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1. Tilt-to-length coupling in LISA Pathfinder: long-term stability

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, Silva, M de Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Giardini, D, Gibert, F, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Hartig, M-S, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspé, H, Jennrich, O, Jetzer, P, Johann, U, Johlander, B, Karnesis, N, Kaune, B, Killow, C J, Korsakova, N, Lobo, J A, López-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Martín, V, Martin-Polo, L, Martin-Porqueras, F, Martino, J, McNamara, P W, Mendes, J, Mendes, L, Meshksar, N, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Plagnol, E, Ramos-Castro, J, Reiche, J, Rivas, F, Robertson, D I, Russano, G, Sanjuan, J, Slutsky, J, Sopuerta, C F, Sumner, T, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P J, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular timespans. In this work, we investigate the long-term stability of the coupling coefficients of this noise. We show that they drifted slowly (by 1\,$\mu$m/rad and 6$\times10^{-6}$ in 100 days) and strongly correlated to temperature changes within the satellite (8\,$\mu$m/rad/K and 30$\times10^{-6}$/K). Based on analytical TTL coupling models, we attribute the temperature-driven coupling changes to rotations of the test masses and small distortions in the optical setup. Particularly, we show that LISA Pathfinder's optical baseplate was bent during the cooldown experiment, which started in late 2016 and lasted several months.

Published
2024
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2. Precision measurements of the magnetic parameters of LISA Pathfinder test masses

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, Silva, M De Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Giardini, D, Gibert, F, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Hartig, M S, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspé, H, Jennrich, O, Jetzer, P, Karnesis, N, Kaune, B, Korsakova, N, Killow, C J, Liu, L, Lobo, J A, López-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Martín, V, Martino, J, Martin-Polo, L, Martin-Porqueras, F, McNamara, P W, Mendes, J, Mendes, L, Meshksar, N, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Pivato, P, Plagnol, E, Ramos-Castro, J, Reiche, J, Rivas, F, Robertson, D I, Russano, G, Serrano, D, Slutsky, J, Sopuerta, C F, Sumner, T, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract

A precise characterization of the magnetic properties of LISA Pathfinder free falling test-masses is of special interest for future gravitational wave observatory in space. Magnetic forces have an important impact on the instrument sensitivity in the low frequency regime below the millihertz. In this paper we report on the magnetic injection experiments performed throughout LISA Pathfinder operations. We show how these experiments allowed a high precision estimate of the instrument magnetic parameters. The remanent magnetic moment was found to have a modulus of $(0.245\pm0.081)\,\rm{nAm}^2$, the x-component of the background magnetic field within the test masses position was measured to be $(414 \pm 74)$ nT and its gradient had a value of $(-7.4\pm 2.1)\,\mu$T/m. Finally, we also measured the test mass magnetic susceptibility to be $(-3.35\pm0.15)\times$10$^{-5}$ in the low frequency regime. All results are in agreement with on-ground estimates.

Published
2024

3. Magnetic-induced force noise in LISA Pathfinder free-falling test masses

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, Silva, M De Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Giardini, D, Gibert, F, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Hartig, M S, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspé, H, Jennrich, O, Jetzer, P, Karnesis, N, Kaune, B, Korsakova, N, Killow, C J, Liu, L, Lobo, J A, López-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Martín, V, Martino, J, Martin-Polo, L, Martin-Porqueras, F, McNamara, P W, Mendes, J, Mendes, L, Meshksar, N, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Pivato, P, Plagnol, E, Ramos-Castro, J, Reiche, J, Rivas, F, Robertson, D I, Russano, G, Serrano, D, Slutsky, J, Sopuerta, C F, Sumner, T, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract

LISA Pathfinder was a mission designed to test key technologies required for gravitational wave detection in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime, which corresponds to the measurement band of interest for future space-borne gravitational wave observatories. Magnetic-induced forces couple to the test mass motion, introducing a contribution to the relative acceleration noise between the free falling test masses. In this Letter we present the first complete estimate of this term of the instrument performance model. Our results set the magnetic-induced acceleration noise during the February 2017 noise run of $\rm 0.25_{-0.08}^{+0.15}\,fm\,s^{-2}/\sqrt{Hz}$ at 1 mHz and $\rm 1.01_{-0.24}^{+0.73}\, fm\,s^{-2}/\sqrt{Hz}$ at 0.1 mHz. We also discuss how the non-stationarities of the interplanetary magnetic field can affect these values during extreme space weather conditions.

Published
2024

4. In-depth analysis of LISA Pathfinder performance results: Time evolution, noise projection, physical models, and implications for LISA

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Chiavegato, V., Cruise, A. M., Bosco, D. Dal, Danzmann, K., Silva, M. De Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M. S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martın, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D. I., Russano, G., Sala, L., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W. J., Wissel, L., Wittchen, A., Zanoni, C., and Zweifel, P.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over the entire course of its science operations, spanning approximately 500 days. We find that: 1) the evolution of the Brownian noise that dominates the acceleration amplitude spectral density (ASD), for frequencies $f\gtrsim 1\,\text{mHz}$, is consistent with the decaying pressure due to the outgassing of a single gaseous species. 2) between $f=36\,\mu\text{Hz}$ and $1\,\text{mHz}$, the acceleration ASD shows a $1/f$ tail in excess of the Brownian noise of almost constant amplitude, with $\simeq 20\%$ fluctuations over a period of a few days, with no particular time pattern over the course of the mission; 3) at the lowest considered frequency of $f=18\,\mu\text{Hz}$, the ASD significantly deviates from the $1/f$ behavior, because of temperature fluctuations that appear to modulate a quasi-static pressure gradient, sustained by the asymmetries of the outgassing pattern. We also present the results of a projection of the observed acceleration noise on the potential sources for which we had either a direct correlation measurement, or a quantitative estimate from dedicated experiments. These sources account for approximately $40\%$ of the noise power in the $1/f$ tail. Finally, we analyze the possible sources of the remaining unexplained fraction, and identify the possible measures that may be taken to keep those under control in LISA.

Published
2024
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5. NanoNewton electrostatic force actuators for femtoNewton-sensitive measurements: system performance test in the LISA Pathfinder mission

Author

Armano, M, Audley, H, Baird, J, Bassan, M, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Chiavegato, V, Cruise, A M, Bosco, D Dal, Danzmann, K, Silva, M De Deus, De Rosa, R, Di Fiore, L, Diepholz, I, Dixon, G, Dolesi, R, Ferroni, L Ferraioli V, Fitzsimons, E D, Freschi, M, Gesa, L, Giardini, D, Gibert, F, Giusteri, R, Grado, A, Grimani, C, Grzymisch, J, Harrison, I, Hartig, M S, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspé, H, Jennrich, O, Jetzer, P, Johlander, B, Karnesis, N, Kaune, B, Korsakova, N, Killow, C J, Liu, L, Lobo, J A, López-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Martín, V, Martin-Polo, L, Martin-Porqueras, F, Martino, J, McNamara, P W, Mendes, J, Mendes, L, Meshksar, N, Moerschell, J, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Plagnol, E, Praplan, C, Ramos-Castro, J, Reiche, J, Rivas, F, Robertson, D I, Russano, G, Sala, L, Sarra, P, Schule-Walewski, S L, Slutsky, J, Sopuerta, C F, Stanga, R, Sumner, T, Pierick, J ten, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P, Weber, W J, Wissel, L, Wittchen, A, Zanoni, C, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract

Electrostatic force actuation is a key component of the system of geodesic reference test masses (TM) for the LISA orbiting gravitational wave observatory and in particular for performance at low frequencies, below 1 mHz, where the observatory sensitivity is limited by stray force noise. The system needs to apply forces of order 10$^{-9}$ N while limiting fluctuations in the measurement band to levels approaching 10$^{-15}$ N/Hz$^{1/2}$. We present here the LISA actuation system design, based on audio-frequency voltage carrier signals, and results of its in-flight performance test with the LISA Pathfinder test mission. In LISA, TM force actuation is used to align the otherwise free-falling TM to the spacecraft-mounted optical metrology system, without any forcing along the critical gravitational wave-sensitive interferometry axes. In LISA Pathfinder, on the other hand, the actuation was used also to stabilize the TM along the critical $x$ axis joining the two TM, with the commanded actuation force entering directly into the mission's main differential acceleration science observable. The mission allowed demonstration of the full compatibility of the electrostatic actuation system with the LISA observatory requirements, including dedicated measurement campaigns to amplify, isolate, and quantify the two main force noise contributions from the actuation system, from actuator gain noise and from low frequency ``in band'' voltage fluctuations. These campaigns have shown actuation force noise to be a relevant, but not dominant, noise source in LISA Pathfinder and have allowed performance projections for the conditions expected in the LISA mission.

Published
2023

6. Tilt-to-length coupling in LISA Pathfinder: a data analysis

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, Silva, M de Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Giardini, D, Gibert, F, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Hartig, M-S, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspé, H, Jennrich, O, Jetzer, P, Johann, U, Johlander, B, Karnesis, N, Kaune, B, Killow, C J, Korsakova, N, Lobo, J A, López-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Martín, V, Martin-Polo, L, Martin-Porqueras, F, Martino, J, McNamara, P W, Mendes, J, Mendes, L, Meshksar, N, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Plagnol, E, Ramos-Castro, J, Reiche, J, Rivas, F, Robertson, D I, Russano, G, Sanjuan, J, Slutsky, J, Sopuerta, C F, Sumner, T, Tevlin, L, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P J, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present a study of the tilt-to-length coupling noise during the LISA Pathfinder mission and how it depended on the system's alignment. Tilt-to-length coupling noise is the unwanted coupling of angular and lateral spacecraft or test mass motion into the primary interferometric displacement readout. It was one of the major noise sources in the LISA Pathfinder mission and is likewise expected to be a primary noise source in LISA. We demonstrate here that a recently derived and published analytical model describes the dependency of the LISA Pathfinder tilt-to-length coupling noise on the alignment of the two freely falling test masses. This was verified with the data taken before and after the realignments performed in March (engineering days) and June 2016, and during a two-day experiment in February 2017 (long cross-talk experiment). The latter was performed with the explicit goal of testing the tilt-to-length coupling noise dependency on the test mass alignment. Using the analytical model, we show that all realignments performed during the mission were only partially successful and explain the reasons why. In addition to the analytical model, we computed another physical tilt-to-length coupling model via a minimising routine making use of the long cross-talk experiment data. A similar approach could prove useful for the LISA mission.

Published
2023
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7. Charging of free-falling test masses in orbit due to cosmic rays: results from LISA Pathfinder

Author

LISA Pathfinder Collaboration, Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cesarini, A. Cavalleri A., Cruise, A. M, Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M. -S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Killow, C. J., Korsakova, N., Lobo, J. A., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martino, J., Martin-Polo, L., Martin-Porqueras, F., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D. I., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T. J., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

A comprehensive summary of the measurements made to characterize test mass charging due to the space environment during the LISA Pathfinder mission is presented. Measurements of the residual charge of the test mass after release by the grabbing and positioning mechanism, show that the initial charge of the test masses was negative after all releases, leaving the test mass with a potential in the range $-12$ mV to $-512$ mV. Variations in the neutral test mass charging rate between $21.7$ e s$^{-1}$ and $30.7$ e s$^{-1}$ were observed over the course of the 17-month science operations produced by cosmic ray flux changes including a Forbush decrease associated with a small solar energetic particle event. A dependence of the cosmic ray charging rate on the test mass potential between $-30.2$ e s$^{-1}$ V$^{-1}$ and $-40.3$ e s$^{-1}$ V$^{-1}$ was observed and this is attributed to a contribution to charging from low-energy electrons emitted from the gold surfaces of the gravitational reference sensor. Data from the on-board particle detector show a reliable correlation with the charging rate and with other environmental monitors of the cosmic ray flux. This correlation is exploited to extrapolate test mass charging rates to a 20-year period giving useful insight into the expected range of charging rate that may be observed in the LISA mission., Comment: 17 pages, 10 figures

Published
2022
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8. Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D. I., Roma-Dollase, D., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Telloni, D., Texier, D., Thorpe, J. I., Trenkel, C., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for a gravitational wave observatory in space. Magnetically driven forces play a key role in the instrument sensitivity in the low-frequency regime (mHz and below), the measurement band of interest for a space-based observatory. The magnetic field can couple to the magnetic susceptibility and remanent magnetic moment from the test masses and disturb them from their geodesic movement. LISA Pathfinder carried on-board a dedicated magnetic measurement subsystem with noise levels of 10 $ \rm nT \ Hz^{-1/2}$ from 1 Hz down to 1 mHz. In this paper we report on the magnetic measurements throughout LISA Pathfinder operations. We characterise the magnetic environment within the spacecraft, study the time evolution of the magnetic field and its stability down to 20 $\mu$Hz, where we measure values around 200 $ \rm nT \ Hz^{-1/2}$ and identify two different frequency regimes, one related to the interplanetary magnetic field and the other to the magnetic field originating inside the spacecraft. Finally, we characterise the non-stationary component of the fluctuations of the magnetic field below the mHz and relate them to the dynamics of the solar wind., Comment: 16 pages, 17 figures. MNRAS LaTeX style file version 3.0

Published
2020
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9. LISA Pathfinder Performance Confirmed in an Open-Loop Configuration: Results from the Free-Fall Actuation Mode

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Liu, L., Llopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martìn, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Physics - Space Physics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We report on the results of the LISA Pathfinder (LPF) free-fall mode experiment, in which the control force needed to compensate the quasistatic differential force acting on two test masses is applied intermittently as a series of "impulse" forces lasting a few seconds and separated by roughly 350 s periods of true free fall. This represents an alternative to the normal LPF mode of operation in which this balancing force is applied continuously, with the advantage that the acceleration noise during free fall is measured in the absence of the actuation force, thus eliminating associated noise and force calibration errors. The differential acceleration noise measurement presented here with the free-fall mode agrees with noise measured with the continuous actuation scheme, representing an important and independent confirmation of the LPF result. An additional measurement with larger actuation forces also shows that the technique can be used to eliminate actuation noise when this is a dominant factor.

Published
2019
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10. Temperature stability in the sub-milliHertz band with LISA Pathfinder

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Mansanet, C., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Sanjuán, J., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Trenkel, C., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, General Relativity and Quantum Cosmology
Abstract

LISA Pathfinder (LPF) was a technology pioneering mission designed to test key technologies required for gravitational wave detection in space. In the low frequency regime (milli-Hertz and below), where space-based gravitational wave observatories will operate, temperature fluctuations play a crucial role since they can couple into the interferometric measurement and the test masses' free-fall accuracy in many ways. A dedicated temperature measurement subsystem, with noise levels in 10$\,\mu$K$\,$Hz$^{-1/2}$ down to $1\,$mHz was part of the diagnostics unit on board LPF. In this paper we report on the temperature measurements throughout mission operations, characterize the thermal environment, estimate transfer functions between different locations and report temperature stability (and its time evolution) at frequencies as low as 10$\,\mu$Hz, where typically values around $1\,$K$\,$Hz$^{-1/2}$ were measured., Comment: 13 pages, 16 figures. MNRAS LaTeX style file version 3.0

Published
2019
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11. Micrometeoroid Events in LISA Pathfinder

Author

Thorpe, James Ira, Slutsky, Jacob, Baker, John, Littenberg, Tyson, Hourihane, Sophie, Pagane, Nicole, Pokorny, Petr, Janches, Diego, Armano, Michele, Audley, Heather, Auger, G., Baird, Jonathan, Bassan, Massimo, Binetruy, Pierre, Born, Michael, Bortoluzzi, D., Brandt, N., Caleno, M., Cavalleri, A, Cesarini, A, Cruise, A. M., Danzmann, K., Silva, M. de Deus, De Rosa, R., Di Fiore, L., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E., Flatscher, R., Freschi, M., Marirrodriga, C. Garcia, Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grado, A., Grimani, C., Gryzmisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspe, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C., Lobo, J. A., Lloro, I., Liu, L., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martin, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Madden, S., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Ramos-Castro, J., Reiche, J., Robertson, D., Rozemeijer, H., Rivas, F., Russano, G., Sarra, P., Schleicher, A., Shaul, D., Soperta, C., Stanga, R., Sumner, T., Texier, D., Trobs, M., Vetrungno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., Ziegler, T., and Zweifel, P.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The zodiacal dust complex, a population of dust and small particles that pervades the Solar System, provides important insight into the formation and dynamics of planets, comets, asteroids, and other bodies. Here we present a new set of data obtained using a novel technique: direct measurements of momentum transfer to a spacecraft from individual particle impacts. This technique is made possible by the extreme precision of the instruments flown on the LISA Pathfinder spacecraft, a technology demonstrator for a future space-based gravitational wave observatory that operated near the first Sun-Earth Lagrange point from early 2016 through Summer of 2017. Using a simple model of the impacts and knowledge of the control system, we show that it is possible to detect impacts and measure properties such as the transferred momentum (related to the particle's mass and velocity), direction of travel, and location of impact on the spacecraft. In this paper, we present the results of a systematic search for impacts during 4348 hours of Pathfinder data. We report a total of 54 candidates with momenta ranging from 0.2$\,\mu\textrm{Ns}$ to 230$\,\mu\textrm{Ns}$. We furthermore make a comparison of these candidates with models of micrometeoroid populations in the inner solar system including those resulting from Jupiter-family comets, Oort-cloud comets, Hailey-type comets, and Asteroids. We find that our measured population is consistent with a population dominated by Jupiter-family comets with some evidence for a smaller contribution from Hailey-type comets. This is in agreement with consensus models of the zodiacal dust complex in the momentum range sampled by LISA Pathfinder., Comment: 22 pages, 14 figures, accepted in ApJ

Published
2019
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12. Forbush decreases and $<$ 2-day GCR flux non-recurrent variations studied with LISA Pathfinder

Author

Grimani, C., Armano, M., Audley, H., Baird, J., Benella, S., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Fabi, M., Ferraioli, L., Ferroni, V., Finetti, N., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Kudela, K., Laurenza, M., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Telloni, D., Texier, D., Thorpe, J. I., Vetrugno, D., Villani, M., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Physics - Space Physics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

Non-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n$^{-1}$ were observed between 2016 February 18 and 2017 July 3 aboard the European Space Agency LISA Pathfinder (LPF) mission orbiting around the Lagrange point L1 at 1.5$\times$10$^6$ km from Earth. The energy dependence of three Forbush decreases (FDs) is studied and reported here. A comparison of these observations with others carried out in space down to the energy of a few tens of MeV n$^{-1}$ shows that the same GCR flux parameterization applies to events of different intensity during the main phase. FD observations in L1 with LPF and geomagnetic storm occurrence is also presented. Finally, the characteristics of GCR flux non-recurrent variations (peaks and depressions) of duration $<$ 2 days and their association with interplanetary structures are investigated. It is found that, most likely, plasma compression regions between subsequent corotating high-speed streams cause peaks, while heliospheric current sheet crossing cause the majority of the depressions.

Published
2019
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13. Experimental results from the ST7 mission on LISA Pathfinder

Author

Anderson, G, Anderson, J, Anderson, M, Aveni, G, Bame, D, Barela, P, Blackman, K, Carmain, A, Chen, L, Cherng, M, Clark, S, Connally, M, Connolly, W, Conroy, D, Cooper, M, Cutler, C, D'Agostino, J, Demmons, N, Dorantes, E, Dunn, C, Duran, M, Ehrbar, E, Evans, J, Fernandez, J, Franklin, G, Girard, M, Gorelik, J, Hruby, V, Hsu, O, Jackson, D, Javidnia, S, Kern, D, Knopp, M, Kolasinski, R, Kuo, C, Le, T, Li, I, Liepack, O, Littlefield, A, Maghami, P, Malik, S, Markley, L, Martin, R, Marrese-Reading, C, Mehta, J, Mennela, J, Miller, D, Nguyen, D, O'Donnell, J, Parikh, R, Plett, G, Ramsey, T, Randolph, T, Rhodes, S, Romero-Wolf, A, Roy, T, Ruiz, A, Shaw, H, Slutsky, J, Spence, D, Stocky, J, Tallon, J, Thorpe, I, Tolman, W, Umfress, H, Valencia, R, Valerio, C, Warner, W, Wellman, J, Willis, P, Ziemer, J, Zwahlen, J, Armano, M, Audley, H, Baird, J, Binetruy, P, Born, a M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, A M, Danzmann, K, Silva, M de Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Fitzsimons, E D, Freschi, M, Gesa, L, Gibert, F, Giardini, D, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspe, H, Jennrich, O, Jetzer, P, Karnesis, N, Kaune, B, Korsakova, N, Killow, C J, Lobo, J A, Lloro, I, Liu, L, Lopez-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Meshksar, N, Martin, V, Martin-Polo, L, Martino, J, Martin-Porqueras, F, Mateos, I, McNamara, P W, Mendes, J, Mendes, L, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Pivato, P, Plagnol, E, Ramos-Castro, J, Reiche, J, Robertson, D I, Rivas, F, Russano, G, Sopuerta, C F, Sumner, T, Texier, D, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P J, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July of 2017 on the European Space Agency's LISA Pathfinder spacecraft. The joint goal of the NASA and ESA missions was to validate key technologies for a future space-based gravitational wave observatory targeting the source-rich milliHertz band. The two primary components of ST7-DRS are a micropropulsion system based on colloidal micro-Newton thrusters (CMNTs) and a control system that simultaneously controls the attitude and position of the spacecraft and the two free-flying test masses (TMs). This paper presents our main experimental results and summarizes the overall the performance of the CMNTs and control laws. We find that the CMNT performance to be consistent with pre-flight predictions, with a measured system thrust noise on the order of $100\,\textrm{nN}/\sqrt{\textrm{Hz}}$ in the $1\,\textrm{mHz}\leq f \leq 30\,\textrm{mHz}$ band. The control system maintained the TM-spacecraft separation with an RMS error of less than 2$\,$nm and a noise spectral density of less than $3\,\textrm{nm}/\sqrt{\textrm{Hz}}$ in the same band. Thruster calibration measurements yield thrust values consistent with the performance model and ground-based thrust-stand measurements, to within a few percent. We also report a differential acceleration noise between the two test masses with a spectral density of roughly $3\,\textrm{fm}/\textrm{s}^2/\sqrt{\textrm{Hz}}$ in the $1\,\textrm{mHz}\leq f \leq 30\,\textrm{mHz}$ band, slightly less than twice as large as the best performance reported with the baseline LISA Pathfinder configuration and below the current requirements for the Laser Interferometer Space Antenna (LISA) mission.

Published
2018
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14. Precision Charge Control for Isolated Free-Falling Test Masses: LISA Pathfinder Results

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Liu, L., Lloro, I., Lobo, J. A., López-Zaragoza, J. P., Maarschalkerweerd, R., Mailland, F., Mance, D., Martín, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshskar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pfeil, M., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Santoruvo, G., Sarra, P., Shaul, D., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Trenkel, C., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Waschke, S., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Physics - Instrumentation and Detectors
Abstract

The LISA Pathfinder charge management device was responsible for neutralising the cosmic ray induced electric charge that inevitably accumulated on the free-falling test masses at the heart of the experiment. We present measurements made on ground and in-flight that quantify the performance of this contactless discharge system which was based on photo-emission under UV illumination. In addition, a two-part simulation is described that was developed alongside the hardware. Modelling of the absorbed UV light within the Pathfinder sensor was carried out with the GEANT4 software toolkit and a separate MATLAB charge transfer model calculated the net photocurrent between the test masses and surrounding housing in the presence of AC and DC electric fields. We confront the results of these models with observations and draw conclusions for the design of discharge systems for future experiments like LISA that will also employ free-falling test masses.

Published
2018
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15. Calibrating the system dynamics of LISA Pathfinder

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

LISA Pathfinder (LPF) was a European Space Agency mission with the aim to test key technologies for future space-borne gravitational-wave observatories like LISA. The main scientific goal of LPF was to demonstrate measurements of differential acceleration between free-falling test masses at the sub-femto-g level, and to understand the residual acceleration in terms of a physical model of stray forces, and displacement readout noise. A key step toward reaching the LPF goals was the correct calibration of the dynamics of LPF, which was a three-body system composed by two test-masses enclosed in a single spacecraft, and subject to control laws for system stability. In this work, we report on the calibration procedures adopted to calculate the residual differential stray force per unit mass acting on the two test-masses in their nominal positions. The physical parameters of the adopted dynamical model are presented, together with their role on LPF performance. The analysis and results of these experiments show that the dynamics of the system was accurately modeled and the dynamical parameters were stationary throughout the mission. Finally, the impact and importance of calibrating system dynamics for future space-based gravitational wave observatories is discussed.

Published
2018
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16. Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a Forbush decrease with LISA Pathfinder

Author

Armano, M., Audley, H., Baird, J., Bassan, M., Benella, S., Binetruy, P., Born, M., Bortoluzzi, D., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., Silva, M. de Deus, Diepholz, I., Dixon, G., Dolesi, R., Fabi, M., Ferraioli, L., Ferroni, V., Finetti, N., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Laurenza, M., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Sabbatini, F., Slutsky, J., Sopuerta, C. F., Sumner, T., Telloni, D., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., and Zweifel, P.

Subjects
Physics - Space Physics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin. A high counting rate particle detector (PD) aboard LISA Pathfinder (LPF), meant for subsystems diagnostics, was devoted to the measurement of galactic cosmic-ray and solar energetic particle integral fluxes above 70 MeV n$^{-1}$ up to 6500 counts s$^{-1}$. PD data were gathered with a sampling time of 15 s. Characteristics and energy-dependence of GCR flux recurrent depressions and of a Forbush decrease dated August 2, 2016 are reported here. The capability of interplanetary missions, carrying PDs for instrument performance purposes, in monitoring the passage of interplanetary coronal mass ejections (ICMEs) is also discussed.

Published
2018
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17. Measuring the Galactic Cosmic Ray Flux with the LISA Pathfinder Radiation Monitor

Author

Armano, M, Audley, H, Baird, J, Binetruy, P, Born, M, Bortoluzzi, D, Castelli, E, Cavalleri, A, Cesarini, A, Cruise, M, Danzmann, K, Silva, M de Deus, Diepholz, I, Dixon, G, Dolesi, R, Ferraioli, L, Ferroni, V, Finetti, N, Fitzsimons, E D, Freschi, M, Gesa, L, Gibert, F, Giardini, D, Giusteri, R, Grimani, C, Grzymisch, J, Harrison, I, Heinzel, G, Hewitson, M, Hollington, D, Hoyland, D, Hueller, M, Inchauspe, H, Jennrich, O, Jetzer, P, Karnesis, N, Kaune, B, Korsakova, N, Killow, C J, Lobo, J A, Lloro, I, Liu, L, Lopez-Zaragoza, J P, Maarschalkerweerd, R, Mance, D, Meshskar, N, Martin, V, Martin-Polo, L, Martino, J, Martin-Porqueras, F, Mateos, I, McNamara, P W, Mendes, J, Mendes, L, Nofrarias, M, Paczkowski, S, Perreur-Lloyd, M, Petiteau, A, Pivato, P, Plagnol, E, Ramos-Castro, J, Reiche, J, Robertson, D I, Rivas, F, Russano, G, Slutsky, J, Sopuerta, C F, Sumner, T, Texier, D, Thorpe, J I, Vetrugno, D, Vitale, S, Wanner, G, Ward, H, Wass, P, Weber, W J, Wissel, L, Wittchen, A, and Zweifel, P

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Test mass charging caused by cosmic rays will be a significant source of acceleration noise for space-based gravitational wave detectors like LISA. Operating between December 2015 and July 2017, the technology demonstration mission LISA Pathfinder included a bespoke monitor to help characterise the relationship between test mass charging and the local radiation environment. The radiation monitor made in situ measurements of the cosmic ray flux while also providing information about its energy spectrum. We describe the monitor and present measurements which show a gradual 40% increase in count rate coinciding with the declining phase of the solar cycle. Modulations of up to 10% were also observed with periods of 13 and 26 days that are associated with co-rotating interaction regions and heliospheric current sheet crossings. These variations in the flux above the monitor detection threshold (approximately 70 MeV) are shown to be coherent with measurements made by the IREM monitor on-board the Earth orbiting INTEGRAL spacecraft. Finally we use the measured deposited energy spectra, in combination with a GEANT4 model, to estimate the galactic cosmic ray differential energy spectrum over the course of the mission.

Published
2017
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18. Sensor noise in LISA Pathfinder : Laser frequency noise and its coupling to the optical test mass readout

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Brandt, N., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Flatscher, R., additional, Freschi, M., additional, García, A., additional, Gerndt, R., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Guzman, F., additional, Harrison, I., additional, Hartig, M.-S., additional, Hechenblaikner, G., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Johann, U., additional, Johlander, B., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, Lobo, J. A., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martin-Porqueras, F., additional, Martino, J., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Monsky, A., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Sanjuan, J., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Steier, F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wand, V., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2024
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19. In-flight testing of the injection of the LISA Pathfinder test mass into a geodesic

Author

Bortoluzzi, D., Vignotto, D., Zambotti, A., Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A.M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M.-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C.J., Lobo, J.A., Liu, L., López-Zaragoza, J.P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., McNamara, P.W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D.I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C.F., Sumner, T., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P.J., Weber, W.J., Wissel, L., Wittchen, A., Zweifel, P., and Zanoni, Carlo

Published
2021
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20. Tilt-to-length coupling in LISA Pathfinder: A data analysis

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Hartig, M-S., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Johann, U., additional, Johlander, B., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, Lobo, J. A., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martin-Porqueras, F., additional, Martino, J., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Sanjuan, J., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Tevlin, L., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2023
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21. Measuring the Galactic Cosmic Ray flux with the LISA Pathfinder radiation monitor

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A.M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Finetti, N., Fitzsimons, E.D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C.J., Lobo, J.A., Lloro, I., Liu, L., Lopez-Zaragoza, J.P., Maarschalkerweerd, R., Mance, D., Meshskar, N., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P.W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D.I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C.F., Sumner, T., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P., Weber, W.J., Wissel, L., Wittchen, A., and Zweifel, P.

Published
2018
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24. Charging of free-falling test masses in orbit due to cosmic rays: Results from LISA Pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Hartig, M.-S., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, Lobo, J. A., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martino, J., additional, Martin-Polo, L., additional, Martin-Porqueras, F., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T. J., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2023
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25. Charging of free-falling test masses in orbit due to cosmic rays: Results from LISA Pathfinder

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A.M., Danzmann, K., De Deus, Silva M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M.-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Killow, C.J., Korsakova, N., Lobo, J.A., López-Zaragoza, J.P., Maarschalkerweerd, R., Mance, D., Martín, V., Martino, J., Martin-Polo, L., Martin-Porqueras, F., McNamara, P.W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D.I., Russano, G., Slutsky, J., Sopuerta, C.F., Sumner, T.J., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P.J., Weber, W.J., Wissel, L., Wittchen, A., Zweifel, P., Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A.M., Danzmann, K., De Deus, Silva M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Freschi, M., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Hartig, M.-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Killow, C.J., Korsakova, N., Lobo, J.A., López-Zaragoza, J.P., Maarschalkerweerd, R., Mance, D., Martín, V., Martino, J., Martin-Polo, L., Martin-Porqueras, F., McNamara, P.W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D.I., Russano, G., Slutsky, J., Sopuerta, C.F., Sumner, T.J., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P.J., Weber, W.J., Wissel, L., Wittchen, A., and Zweifel, P.

Abstract

A comprehensive summary of the measurements made to characterize test-mass charging due to the space environment during the LISA Pathfinder mission is presented. Measurements of the residual charge of the test mass after release by the grabbing and positioning mechanism show that the initial charge of the test masses was negative after all releases, leaving the test mass with a potential in the range from -12 to -512. Variations in the neutral test-mass charging rate between 21.7 and 30.7 e s-1 were observed over the course of the 17-month science operations produced by cosmic ray flux changes including a Forbush decrease associated with a small solar energetic particle event. A dependence of the cosmic ray charging rate on the test-mass potential between -30.2 and -40.3 e s-1 V-1 was observed resulting in an equilibrium test-mass potential between 670 and 960 mV, and this is attributed to a contribution to charging from low-energy electrons emitted from the gold surfaces of the gravitational reference sensor. Data from the onboard particle detector show a reliable correlation with the charging rate and with other environmental monitors of the cosmic ray flux. This correlation is exploited to extrapolate test-mass charging rates to a 20-year period giving useful insight into the expected range of charging rate that may be observed in the LISA mission.

Published
2023

26. The influence of laser relative intensity noise in the Laser Interferometer Space Antenna

Author

Wissel, L., Hartwig, O., Bayle, J.B., Staab, M., Fitzsimons, E.D., Hewitson, M., Heinzel, G., and HEP, INSPIRE

Subjects
time delay: interferometer, LISA, [PHYS.GRQC] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], satellite, gravitational radiation, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), 07.60.Ly, General Relativity and Quantum Cosmology, laser, 07.87.+v, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], propagation, readout, 95.55.Ym, noise: correlation, 07.05.Kf, 42.62.Eh, 07.50.Qx, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), performance
Abstract

LISA is an upcoming ESA mission that will detect gravitational waves in space by interferometrically measuring the separation between free-falling test masses at picometer precision. To reach the desired performance, LISA will employ the noise reduction technique time-delay interferometry (TDI), in which multiple raw interferometric readouts are time shifted and combined into the final scientific observables. Evaluating the performance in terms of these TDI variables requires careful tracking of how different noise sources propagate through TDI, as noise correlations might affect the performance in unexpected ways. One example of such potentially correlated noise is the relative intensity noise (RIN) of the six lasers aboard the three LISA satellites, which will couple into the interferometric phase measurements. In this article, we calculate the expected RIN levels based on the current mission architecture and the envisaged mitigation strategies. We find that strict requirements on the technical design reduce the effect from approximately 8.7 pm/rtHz per inter-spacecraft interferometer to that of a much lower sub-1 pm/rtHz noise, with typical characteristics of an uncorrelated readout noise after TDI. Our investigations underline the importance of sufficient balanced detection of the interferometric measurements., 15 pages, 10 figures, 2 tables

Published
2022

27. Sensor noise in LISA Pathfinder : An extensive in-flight review of the angular and longitudinal interferometric measurement system

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Brandt, N., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Flatscher, R., additional, Freschi, M., additional, García, A., additional, Gerndt, R., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Guzman, F., additional, Harrison, I., additional, Hartig, M-S, additional, Hechenblaikner, G., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Johann, U., additional, Johlander, B., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, Lobo, J. A., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martin-Porqueras, F., additional, Martino, J., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Monsky, A., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Sanjuan, J., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Steier, F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wand, V., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2022
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29. Sensor Noise in LISA Pathfinder: In-Flight Performance of the Optical Test Mass Readout

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Flatscher, R., Freschi, M., García, A., Gerndt, R., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Guzman, F., Harrison, I., Hartig, M.-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johann, U., Johlander, B., Karnesis, N., Kaune, B., Killow, C.J., Korsakova, N., Lobo, J.A., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., McNamara, P.W., Mendes, J., Mendes, L., Meshksar, N., Monsky, A., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D.I., Russano, G., Sanjuan, J., Slutsky, J., Sopuerta, C.F., Steier, F., Sumner, T., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wand, V., Wanner, G., Ward, H., Wass, P. J., Weber, W.J., Wissel, L., Wittchen, A., Zweifel, P., Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E.D., Flatscher, R., Freschi, M., García, A., Gerndt, R., Gesa, L., Giardini, D., Gibert, F., Giusteri, R., Grimani, C., Grzymisch, J., Guzman, F., Harrison, I., Hartig, M.-S., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johann, U., Johlander, B., Karnesis, N., Kaune, B., Killow, C.J., Korsakova, N., Lobo, J.A., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martin-Porqueras, F., Martino, J., McNamara, P.W., Mendes, J., Mendes, L., Meshksar, N., Monsky, A., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Rivas, F., Robertson, D.I., Russano, G., Sanjuan, J., Slutsky, J., Sopuerta, C.F., Steier, F., Sumner, T., Texier, D., Thorpe, J.I., Vetrugno, D., Vitale, S., Wand, V., Wanner, G., Ward, H., Wass, P. J., Weber, W.J., Wissel, L., Wittchen, A., and Zweifel, P.

Abstract

We report on the first subpicometer interferometer flown in space. It was part of ESA's Laser Interferometer Space Antenna (LISA) Pathfinder mission and performed the fundamental measurement of the positional and angular motion of two free-falling test masses. The interferometer worked immediately, stably, and reliably from switch on until the end of the mission with exceptionally low residual noise of 32.0-1.7+2.4 fm/Hz, significantly better than required. We present an upper limit for the sensor performance at millihertz frequencies and a model for the measured sensitivity above 200 mHz.

Published
2021

30. Sensor Noise in LISA Pathfinder : In-Flight Performance of the Optical Test Mass Readout

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Brandt, N., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Flatscher, R., additional, Freschi, M., additional, García, A., additional, Gerndt, R., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Guzman, F., additional, Harrison, I., additional, Hartig, M.-S., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Johann, U., additional, Johlander, B., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, Lobo, J. A., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martin-Porqueras, F., additional, Martino, J., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Monsky, A., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Sanjuan, J., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Steier, F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wand, V., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2021
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32. Spacecraft and interplanetary contributions to the magnetic environment on-board LISA Pathfinder

Author

Armano, M, primary, Audley, H, additional, Baird, J, additional, Binetruy, P, additional, Born, M, additional, Bortoluzzi, D, additional, Castelli, E, additional, Cavalleri, A, additional, Cesarini, A, additional, Cruise, A M, additional, Danzmann, K, additional, de Deus Silva, M, additional, Diepholz, I, additional, Dixon, G, additional, Dolesi, R, additional, Ferraioli, L, additional, Ferroni, V, additional, Fitzsimons, E D, additional, Freschi, M, additional, Gesa, L, additional, Gibert, F, additional, Giardini, D, additional, Giusteri, R, additional, Grimani, C, additional, Grzymisch, J, additional, Harrison, I, additional, Hartig, M-S, additional, Heinzel, G, additional, Hewitson, M, additional, Hollington, D, additional, Hoyland, D, additional, Hueller, M, additional, Inchauspé, H, additional, Jennrich, O, additional, Jetzer, P, additional, Karnesis, N, additional, Kaune, B, additional, Korsakova, N, additional, Killow, C J, additional, Lobo, J A, additional, Liu, L, additional, López-Zaragoza, J P, additional, Maarschalkerweerd, R, additional, Mance, D, additional, Martín, V, additional, Martin-Polo, L, additional, Martino, J, additional, Martin-Porqueras, F, additional, Mateos, I, additional, McNamara, P W, additional, Mendes, J, additional, Mendes, L, additional, Meshksar, N, additional, Nofrarias, M, additional, Paczkowski, S, additional, Perreur-Lloyd, M, additional, Petiteau, A, additional, Pivato, P, additional, Plagnol, E, additional, Ramos-Castro, J, additional, Reiche, J, additional, Rivas, F, additional, Robertson, D I, additional, Roma-Dollase, D, additional, Russano, G, additional, Slutsky, J, additional, Sopuerta, C F, additional, Sumner, T, additional, Telloni, D, additional, Texier, D, additional, Thorpe, J I, additional, Trenkel, C, additional, Vetrugno, D, additional, Vitale, S, additional, Wanner, G, additional, Ward, H, additional, Wass, P J, additional, Wealthy, D, additional, Weber, W J, additional, Wissel, L, additional, Wittchen, A, additional, and Zweifel, P, additional

Published
2020
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33. Analysis of the accuracy of actuation electronics in the laser interferometer space antenna pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Born, M., additional, Bortoluzzi, D., additional, Cardines, N., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Giardini, D., additional, Gibert, F., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Hartig, M.-S., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Killow, C. J., additional, Korsakova, N., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Meshksar, N., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Rivas, F., additional, Robertson, D. I., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, ten Pierick, J., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2020
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34. LISA Pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshskar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2020
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35. Circuit design and modeling for soft errors

Author

KleinOsowski, A., Cannon, E.H., Oldiges, P., and Wissel, L.

Subjects
Circuit designer, Integrated circuit design, Circuit design -- Analysis, Error-correcting codes -- Analysis
Abstract

As semiconductor devices decrease in size, soft errors are becoming a major issue that must be addressed at all stages of product definition. Even before prototype silicon chips are available for measuring, modeling must be able to predict soft-error rates with reasonable accuracy. As the technology matures, circuit test sites are produced and experimentally tested to determine representative rail rates of critical SRAM and flip-flop circuits. Circuit models are then fit to these experimental results and further test-site and product circuits are designed and modeled as needed.

Published
2008

36. Capacitive sensing of test mass motion with nanometer precision over millimeter-wide sensing gaps for space-borne gravitational reference sensors

Author

Armano, M., Audley, H., Auger, G., Baird, J., Bassan, M., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Caleno, M., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., De Rosa, R., Di Fiore, L., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Flatscher, R., Freschi, M., García Marirrodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., GRADO, ANIELLO, Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspé, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., López-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martín, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Madden, S., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rozemeijer, H., Rivas, F., Russano, G., Sarra, P., Schleicher, A., Slutsky, J., Sopuerta, C. F., Stanga, R., Sumner, T. J., Texier, D., Thorpe, J. I., Trenkel, C., Tröbs, M., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., Ziegler, T., Zweifel, P., LISA Pathfinder Collaboration, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), LISA Pathfinder, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Armano, M., Audley, H., Auger, G., Baird, J., Bassan, M., Binetruy, P., Born, M., Bortoluzzi, D., Brandt, N., Caleno, M., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., De Deus Silva, M., De Rosa, R., Di Fiore, L., Diepholz, I., Dixon, G., Dolesi, R., Dunbar, N., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Flatscher, R., Freschi, M., Garcia Marirrodriga, C., Gerndt, R., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grado, A., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspe, H., Jennrich, O., Jetzer, P., Johlander, B., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Martin, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Madden, S., Mateos, I., Mcnamara, P. W., Mendes, J., Mendes, L., Meshksar, N., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Prat, P., Ragnit, U., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rozemeijer, H., Rivas, F., Russano, G., Sarra, P., Schleicher, A., Slutsky, J., Sopuerta, C. F., Stanga, R., Sumner, T. J., Texier, D., Thorpe, J. I., Trenkel, C., Trobs, M., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Wealthy, D., Weber, W. J., Wissel, L., Wittchen, A., Zambotti, A., Zanoni, C., Ziegler, T., and Zweifel, P.

Subjects
noise, detector: performance, Capacitive sensing, gap, Astronomy & Astrophysics, gravitational radiation: direct detection, 01 natural sciences, Noise (electronics), rotation, Displacement (vector), Physics, Particles & Fields, Gravitational waves, Optics, Ones gravitacionals, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, MISSION, Physics, LISA, Science & Technology, Spacecraft, 010308 nuclear & particles physics, business.industry, Gravitational wave, Settore FIS/01 - Fisica Sperimentale, gravitational radiation, Ranging, gravitational radiation detector, FOURIER-TRANSFORM, observatory, Pathfinder, gravitation, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Physical Sciences, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Millimeter, business
Abstract

We report on the performance of the capacitive gap-sensing system of the Gravitational Reference Sensor on board the LISA Pathfinder spacecraft. From in-flight measurements, the system has demonstrated a performance, down to 1 mHz, that is ranging between 0.7 and \ud 1.8\ud \ud \ud aF\ud \ud Hz\ud −\ud 1\ud /\ud 2\ud . That translates into a sensing noise of the test mass motion within 1.2 and \ud 2.4\ud \ud nm\ud \ud Hz\ud −\ud 1\ud /\ud 2\ud in displacement and within 83 and \ud 170\ud \ud nrad\ud \ud Hz\ud −\ud 1\ud /\ud 2\ud in rotation. This matches the performance goals for LISA Pathfinder, and it allows the successful implementation of the gravitational waves observatory LISA. A \ud 1\ud /\ud f\ud tail has been observed for frequencies below 1 mHz, the tail has been investigated in detail with dedicated in-flight measurements, and a model is presented in the paper. A projection of such noise to frequencies below 0.1 mHz shows that an improvement of performance at those frequencies is desirable for the next generation of gravitational reference sensors for space-borne gravitational waves observation.

Published
2017

38. LISA Pathfinder Performance Confirmed in an Open-Loop Configuration: Results from the Free-Fall Actuation Mode

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Hartig, M-S., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshksar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2019
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39. Temperature stability in the sub-milliHertz band with LISA Pathfinder

Author

Armano, M, primary, Audley, H, primary, Baird, J, primary, Binetruy, P, primary, Born, M, primary, Bortoluzzi, D, primary, Castelli, E, primary, Cavalleri, A, primary, Cesarini, A, primary, Cruise, A M, primary, Danzmann, K, primary, Silva, M de Deus, primary, Diepholz, I, primary, Dixon, G, primary, Dolesi, R, primary, Ferraioli, L, primary, Ferroni, V, primary, Fitzsimons, E D, primary, Freschi, M, primary, Gesa, L, primary, Gibert, F, primary, Giardini, D, primary, Giusteri, R, primary, Grimani, C, primary, Grzymisch, J, primary, Harrison, I, primary, Heinzel, G, primary, Hewitson, M, primary, Hollington, D, primary, Hoyland, D, primary, Hueller, M, primary, Inchauspé, H, primary, Jennrich, O, primary, Jetzer, P, primary, Karnesis, N, primary, Kaune, B, primary, Korsakova, N, primary, Killow, C J, primary, Lobo, J A, primary, Lloro, I, primary, Liu, L, primary, López-Zaragoza, J P, primary, Maarschalkerweerd, R, primary, Mance, D, primary, Mansanet, C, primary, Martín, V, primary, Martin-Polo, L, primary, Martino, J, primary, Martin-Porqueras, F, primary, Mateos, I, primary, McNamara, P W, primary, Mendes, J, primary, Mendes, L, primary, Meshksar, N, primary, Nofrarias, M, primary, Paczkowski, S, primary, Perreur-Lloyd, M, primary, Petiteau, A, primary, Pivato, P, primary, Plagnol, E, primary, Ramos-Castro, J, primary, Reiche, J, primary, Robertson, D I, primary, Rivas, F, primary, Russano, G, primary, Sanjuán, J, primary, Slutsky, J, primary, Sopuerta, C F, primary, Sumner, T, primary, Texier, D, primary, Thorpe, J I, primary, Trenkel, C, primary, Vetrugno, D, primary, Vitale, S, primary, Wanner, G, primary, Ward, H, primary, Wass, P J, primary, Wealthy, D, primary, Weber, W J, primary, Wissel, L, primary, Wittchen, A, primary, and Zweifel, P, primary

Published
2019
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40. Forbush Decreases and <2 Day GCR Flux Non-recurrent Variations Studied with LISA Pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Benella, S., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, Silva, M. de Deus, additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Fabi, M., additional, Ferraioli, L., additional, Ferroni, V., additional, Finetti, N., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Kudela, K., additional, Laurenza, M., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshksar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Telloni, D., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Villani, M., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2019
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41. Experimental results from the ST7 mission on LISA Pathfinder

Author

Anderson, G., primary, Anderson, J., additional, Anderson, M., additional, Aveni, G., additional, Bame, D., additional, Barela, P., additional, Blackman, K., additional, Carmain, A., additional, Chen, L., additional, Cherng, M., additional, Clark, S., additional, Connally, M., additional, Connolly, W., additional, Conroy, D., additional, Cooper, M., additional, Cutler, C., additional, D’Agostino, J., additional, Demmons, N., additional, Dorantes, E., additional, Dunn, C., additional, Duran, M., additional, Ehrbar, E., additional, Evans, J., additional, Fernandez, J., additional, Franklin, G., additional, Girard, M., additional, Gorelik, J., additional, Hruby, V., additional, Hsu, O., additional, Jackson, D., additional, Javidnia, S., additional, Kern, D., additional, Knopp, M., additional, Kolasinski, R., additional, Kuo, C., additional, Le, T., additional, Li, I., additional, Liepack, O., additional, Littlefield, A., additional, Maghami, P., additional, Malik, S., additional, Markley, L., additional, Martin, R., additional, Marrese-Reading, C., additional, Mehta, J., additional, Mennela, J., additional, Miller, D., additional, Nguyen, D., additional, O’Donnell, J., additional, Parikh, R., additional, Plett, G., additional, Ramsey, T., additional, Randolph, T., additional, Rhodes, S., additional, Romero-Wolf, A., additional, Roy, T., additional, Ruiz, A., additional, Shaw, H., additional, Slutsky, J., additional, Spence, D., additional, Stocky, J., additional, Tallon, J., additional, Thorpe, I., additional, Tolman, W., additional, Umfress, H., additional, Valencia, R., additional, Valerio, C., additional, Warner, W., additional, Wellman, J., additional, Willis, P., additional, Ziemer, J., additional, Zwahlen, J., additional, Armano, M., additional, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshksar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2018
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42. Beyond the Required LISA Free-Fall Performance: New LISA Pathfinder Results down to 20 mu Hz

Author

Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspe, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martin, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., Zweifel, P., Armano, M., Audley, H., Baird, J., Binetruy, P., Born, M., Bortoluzzi, D., Castelli, E., Cavalleri, A., Cesarini, A., Cruise, A. M., Danzmann, K., de Deus Silva, M., Diepholz, I., Dixon, G., Dolesi, R., Ferraioli, L., Ferroni, V., Fitzsimons, E. D., Freschi, M., Gesa, L., Gibert, F., Giardini, D., Giusteri, R., Grimani, C., Grzymisch, J., Harrison, I., Heinzel, G., Hewitson, M., Hollington, D., Hoyland, D., Hueller, M., Inchauspe, H., Jennrich, O., Jetzer, P., Karnesis, N., Kaune, B., Korsakova, N., Killow, C. J., Lobo, J. A., Lloro, I., Liu, L., Lopez-Zaragoza, J. P., Maarschalkerweerd, R., Mance, D., Meshksar, N., Martin, V., Martin-Polo, L., Martino, J., Martin-Porqueras, F., Mateos, I., McNamara, P. W., Mendes, J., Mendes, L., Nofrarias, M., Paczkowski, S., Perreur-Lloyd, M., Petiteau, A., Pivato, P., Plagnol, E., Ramos-Castro, J., Reiche, J., Robertson, D. I., Rivas, F., Russano, G., Slutsky, J., Sopuerta, C. F., Sumner, T., Texier, D., Thorpe, J. I., Vetrugno, D., Vitale, S., Wanner, G., Ward, H., Wass, P. J., Weber, W. J., Wissel, L., Wittchen, A., and Zweifel, P.

Abstract

In the months since the publication of the first results, the noise performance of LISA Pathfinder has improved because of reduced Brownian noise due to the continued decrease in pressure around the test masses, from a better correction of noninertial effects, and from a better calibration of the electrostatic force actuation. In addition, the availability of numerous long noise measurement runs, during which no perturbation is purposely applied to the test masses, has allowed the measurement of noise with good statistics down to 20 mu Hz. The Letter presents the measured differential acceleration noise figure, which is at (1.74 +/- 0.01) fm s(-2)/root Hz above 2 mHz and (6 +/- 1) x 10 fm s(-2)/root Hz at 20 mu Hz, and discusses the physical sources for the measured noise. This performance provides an experimental benchmark demonstrating the ability to realize the low-frequency science potential of the LISA mission, recently selected by the European Space Agency.

Published
2018

43. LISA Pathfinder: First steps to observing gravitational waves from space

Author

LISA Pathfinder Collaboration, Audley, H., Born, M., Danzmann, K., Diepholz, I., Heinzel, G., Hewitson, M., Karnesis, N., Kaune, B., Korsakova, N., Paczkowsk, S., Reiche, J., Troebs, M., Wanner, G., Wissel, L., and Wittchen, A.

Subjects
ddc:530, gravitational wave detection, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, ESA, Gravitational waves
Abstract

LISA Pathfinder, the European Space Agency's technology demonstrator mission for future spaceborne gravitational wave observatories, was launched on 3 December 2015, from the European space port of Kourou, French Guiana. After a short duration transfer to the final science orbit, the mission has been gathering science data since. This data has allowed the science community to validate the critical technologies and measurement principle for low frequency gravitational wave detection and thereby confirming the readiness to start the next generation gravitational wave observatories, such as LISA. This paper will briefly describe the mission, followed by a description of the science operations highlighting the performance achieved. Details of the various experiments performed during the nominal science operations phase can be found in accompanying papers in this volume.

Published
2017

44. LISA Pathfinder closed-loop analysis: a model breakdown of the in-loop observables

Author

LISA Pathfinder Collaboration, Audley, H., Born, M., Danzmann, K., Diepholz, I., Heinzel, G., Hewitson, M., Karnesis, N., Kaune, B., Korsakova, N., Paczkowski, S., Reiche, J., Troebs, M., Wanner, G., Wissel, L., and Wittchen, A.

Subjects
analysis, ddc:530, gravitational wave detection, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, LISA Pathfinder
Abstract

This paper describes a methodology to analyze, in the frequency domain, the steady-state control performances of the LISA Pathfinder mission. In particular, it provides a technical framework to give a comprehensive understanding of the spectra of all the degrees of freedom by breaking them down into their various physical origins, hence bringing out the major contributions of the control residuals. A reconstruction of the measured in-loop output, extracted from a model of the closed-loop system, is shown as an instance to illustrate the potential of such a model breakdown of the data.

Published
2017
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45. Calibrating the system dynamics of LISA Pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshksar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2018
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46. Characteristics and Energy Dependence of Recurrent Galactic Cosmic-Ray Flux Depressions and of a Forbush Decrease with LISA Pathfinder

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Bassan, M., additional, Benella, S., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, Silva, M. de Deus, additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Fabi, M., additional, Ferraioli, L., additional, Ferroni, V., additional, Finetti, N., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Laurenza, M., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Sabbatini, F., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Telloni, D., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, Zambotti, A., additional, Zanoni, C., additional, and Zweifel, P., additional

Published
2018
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47. Beyond the Required LISA Free-Fall Performance: New LISA Pathfinder Results down to 20μHz

Author

Armano, M., primary, Audley, H., additional, Baird, J., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Castelli, E., additional, Cavalleri, A., additional, Cesarini, A., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Ferraioli, L., additional, Ferroni, V., additional, Fitzsimons, E. D., additional, Freschi, M., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Grimani, C., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Meshksar, N., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rivas, F., additional, Russano, G., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Vetrugno, D., additional, Vitale, S., additional, Wanner, G., additional, Ward, H., additional, Wass, P. J., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, and Zweifel, P., additional

Published
2018
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50. Sub-Femto-gFree Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results

Author

Armano, M., primary, Audley, H., additional, Auger, G., additional, Baird, J. T., additional, Bassan, M., additional, Binetruy, P., additional, Born, M., additional, Bortoluzzi, D., additional, Brandt, N., additional, Caleno, M., additional, Carbone, L., additional, Cavalleri, A., additional, Cesarini, A., additional, Ciani, G., additional, Congedo, G., additional, Cruise, A. M., additional, Danzmann, K., additional, de Deus Silva, M., additional, De Rosa, R., additional, Diaz-Aguiló, M., additional, Di Fiore, L., additional, Diepholz, I., additional, Dixon, G., additional, Dolesi, R., additional, Dunbar, N., additional, Ferraioli, L., additional, Ferroni, V., additional, Fichter, W., additional, Fitzsimons, E. D., additional, Flatscher, R., additional, Freschi, M., additional, García Marín, A. F., additional, García Marirrodriga, C., additional, Gerndt, R., additional, Gesa, L., additional, Gibert, F., additional, Giardini, D., additional, Giusteri, R., additional, Guzmán, F., additional, Grado, A., additional, Grimani, C., additional, Grynagier, A., additional, Grzymisch, J., additional, Harrison, I., additional, Heinzel, G., additional, Hewitson, M., additional, Hollington, D., additional, Hoyland, D., additional, Hueller, M., additional, Inchauspé, H., additional, Jennrich, O., additional, Jetzer, P., additional, Johann, U., additional, Johlander, B., additional, Karnesis, N., additional, Kaune, B., additional, Korsakova, N., additional, Killow, C. J., additional, Lobo, J. A., additional, Lloro, I., additional, Liu, L., additional, López-Zaragoza, J. P., additional, Maarschalkerweerd, R., additional, Mance, D., additional, Martín, V., additional, Martin-Polo, L., additional, Martino, J., additional, Martin-Porqueras, F., additional, Madden, S., additional, Mateos, I., additional, McNamara, P. W., additional, Mendes, J., additional, Mendes, L., additional, Monsky, A., additional, Nicolodi, D., additional, Nofrarias, M., additional, Paczkowski, S., additional, Perreur-Lloyd, M., additional, Petiteau, A., additional, Pivato, P., additional, Plagnol, E., additional, Prat, P., additional, Ragnit, U., additional, Raïs, B., additional, Ramos-Castro, J., additional, Reiche, J., additional, Robertson, D. I., additional, Rozemeijer, H., additional, Rivas, F., additional, Russano, G., additional, Sanjuán, J., additional, Sarra, P., additional, Schleicher, A., additional, Shaul, D., additional, Slutsky, J., additional, Sopuerta, C. F., additional, Stanga, R., additional, Steier, F., additional, Sumner, T., additional, Texier, D., additional, Thorpe, J. I., additional, Trenkel, C., additional, Tröbs, M., additional, Tu, H. B., additional, Vetrugno, D., additional, Vitale, S., additional, Wand, V., additional, Wanner, G., additional, Ward, H., additional, Warren, C., additional, Wass, P. J., additional, Wealthy, D., additional, Weber, W. J., additional, Wissel, L., additional, Wittchen, A., additional, Zambotti, A., additional, Zanoni, C., additional, Ziegler, T., additional, and Zweifel, P., additional

Published
2016
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