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138 results on '"McCarrick, H."'

1. A Microwave SQUID Multiplexer Optimized for Bolometric Applications

Author

Dober, B., Ahmed, Z., Arnold, K., Becker, D. T., Bennett, D. A., Connors, J. A., Cukierman, A., D'Ewart, J. M., Duff, S. M., Dusatko, J. E., Frisch, J. C., Gard, J. D., Henderson, S. W., Herbst, R., Hilton, G. C., Hubmayr, J., Li, Y., Mates, J. A. B., McCarrick, H., Reintsema, C. D, Silva-Feaver, M., Ruckman, L., Ullom, J. N., Vale, L. R., Van Winkle, D. D., Vasquez, J., Wang, Y., Young, E., Yu, C., and Zheng, K.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

A microwave SQUID multiplexer ($\mu$MUX) has been optimized for coupling to large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic multiplexer chip design in a 1820-channel multiplexer configuration for the 4-8 GHz rf band. The key metrics of yield, sensitivity, and crosstalk are determined through measurements of 455 readout channels, which span 4-5 GHz. The median white-noise level is 45 pA/$\sqrt{\textrm{Hz}}$, evaluated at 2 Hz, with a 1/f knee $\leq$ 20 mHz after common-mode subtraction. The white-noise level decreases the sensitivity of a TES bolometer optimized for detection of the cosmic microwave background at 150 GHz by only 3%. The measured crosstalk between any channel pair is $\leq$ 0.3%., Comment: 6 pages, 5 figures

Published
2020
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2. The Simons Observatory: Gain, bandpass and polarization-angle calibration requirements for B-mode searches

Author

Abitbol, MH, Alonso, D, Simon, SM, Lashner, J, Crowley, KT, Ali, AM, Azzoni, S, Baccigalupi, C, Barron, D, Brown, ML, Calabrese, E, Carron, J, Chinone, Y, Chluba, J, Coppi, G, Crowley, KD, Devlin, M, Dunkley, J, Errard, J, Fanfani, V, Galitzki, N, Gerbino, M, Hill, JC, Johnson, BR, Jost, B, Keating, B, Krachmalnicoff, N, Kusaka, A, Lee, AT, Louis, T, Madhavacheril, MS, McCarrick, H, McMahon, J, Meerburg, PD, Nati, F, Nishino, H, Page, LA, Poletti, D, Puglisi, G, Randall, MJ, Rotti, A, Spisak, J, Suzuki, A, Teply, GP, Verges, C, Wollack, EJ, Xu, Z, and Zannoni, M

Subjects
CMBR experiments, CMBR polarisation, gravitational waves and CMBR polarization, cosmological parameters from CMBR, astro-ph.CO, astro-ph.IM, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

We quantify the calibration requirements for systematic uncertainties for next-generation ground-based observatories targeting the large-angle B-mode polarization of the Cosmic Microwave Background, with a focus on the Simons Observatory (SO). We explore uncertainties on gain calibration, bandpass center frequencies, and polarization angles, including the frequency variation of the latter across the bandpass. We find that gain calibration and bandpass center frequencies must be known to percent levels or less to avoid biases on the tensor-to-scalar ratio r on the order of Δ r∼10-3, in line with previous findings. Polarization angles must be calibrated to the level of a few tenths of a degree, while their frequency variation between the edges of the band must be known to O(10) degrees. Given the tightness of these calibration requirements, we explore the level to which residual uncertainties on these systematics would affect the final constraints on r if included in the data model and marginalized over. We find that the additional parameter freedom does not degrade the final constraints on r significantly, broadening the error bar by O(10%) at most. We validate these results by reanalyzing the latest publicly available data from the collaboration within an extended parameter space covering both cosmological, foreground and systematic parameters. Finally, our results are discussed in light of the instrument design and calibration studies carried out within SO.

Published
2021

3. Development of Multi-Chroic MKIDs for Next-Generation CMB Polarization Studies

Author

Johnson, B. R., Flanigan, D., Abitbol, M. H., Ade, P. A. R., Bryan, S., Cho, H. -M., Datta, R., Day, P., Doyle, S., Irwin, K., Jones, G., Li, D., Mauskopf, P., McCarrick, H., McMahon, J., Miller, A., Pisano, G., Song, Y., Surdi, H., and Tucker, C.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We report on the status of an ongoing effort to develop arrays of horn-coupled, polarization-sensitive microwave kinetic inductance detectors (MKIDs) that are each sensitive to two spectral bands between 125 and 280 GHz. These multi-chroic MKID arrays are tailored for next-generation, large-detector-count experiments that are being designed to simultaneously characterize the polarization properties of both the cosmic microwave background (CMB) and Galactic dust emission. We present our device design and describe laboratory-based measurement results from two 23-element prototype arrays. From dark measurements of our first engineering array we demonstrated a multiplexing factor of 92, showed the resonators respond to bath temperature changes as expected, and found that the fabrication yield was 100%. From our first optically loaded array we found the MKIDs respond to millimeter-wave pulses, additional optical characterization measurements are ongoing. We end by discussing our plans for scaling up this technology to kilo-pixel arrays over the next two years., Comment: LTD-17 paper accepted by Journal of Low Temperature Physics

Published
2017
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4. Design and performance of dual-polarization lumped-element kinetic inductance detectors for millimeter-wave polarimetry

Author

McCarrick, H., Jones, G., Johnson, B. R., Abitbol, M. H., Ade, P. A. R., Bryan, S., Day, P., Essinger-Hileman, T., Flanigan, D., Leduc, H. G., Limon, M., Mauskopf, P., Miller, A., and Tucker, C.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Lumped-element kinetic inductance detectors (LEKIDs) are an attractive technology for millimeter-wave observations that require large arrays of extremely low-noise detectors. We designed, fabricated and characterized 64-element (128 LEKID) arrays of horn-coupled, dual-polarization LEKIDs optimized for ground-based CMB polarimetry. Our devices are sensitive to two orthogonal polarizations in a single spectral band centered on 150 GHz with $\Delta\nu/\nu=0.2$. The $65\times 65$ mm square arrays are designed to be tiled into the focal plane of an optical system. We demonstrate the viability of these dual-polarization LEKIDs with laboratory measurements. The LEKID modules are tested with an FPGA-based readout system in a sub-kelvin cryostat that uses a two-stage adiabatic demagnetization refrigerator. The devices are characterized using a blackbody and a millimeter-wave source. The polarization properties are measured with a cryogenic stepped half-wave plate. We measure the resonator parameters and the detector sensitivity, noise spectrum, dynamic range, and polarization response. The resonators have internal quality factors approaching $1\times 10^{6}$. The detectors have uniform response between orthogonal polarizations and a large dynamic range. The detectors are photon-noise limited above 1 pW of absorbed power. The noise-equivalent temperatures under a 3.4 K blackbody load are $<100~\mu\mathrm{K\sqrt{s}}$. The polarization fractions of detectors sensitive to orthogonal polarizations are >80%. The entire array is multiplexed on a single readout line, demonstrating a multiplexing factor of 128. The array and readout meet the requirements for 4 arrays to be read out simultaneously for a multiplexing factor of 512. This laboratory study demonstrates the first dual-polarization LEKID array optimized for CMB polarimetry and shows the readiness of the detectors for on-sky observations., Comment: Accepted in Astronomy & Astrophysics, revised version. 11 pages, 8 figures

Published
2017
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5. High quality factor manganese-doped aluminum lumped-element kinetic inductance detectors sensitive to frequencies below 100 GHz

Author

Jones, G., Johnson, B. R., Abitbol, M. H., Ade, P. A. R., Bryan, S., Cho, H. -M., Day, P., Flanigan, D., Irwin, K. D., Li, D., Mauskopf, P., McCarrick, H., Miller, A., Song, Y. R., and Tucker, C.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Condensed Matter - Superconductivity
Abstract

Aluminum lumped-element kinetic inductance detectors (LEKIDs) sensitive to millimeter-wave photons have been shown to exhibit high quality factors, making them highly sensitive and multiplexable. The superconducting gap of aluminum limits aluminum LEKIDs to photon frequencies above 100 GHz. Manganese-doped aluminum (Al-Mn) has a tunable critical temperature and could therefore be an attractive material for LEKIDs sensitive to frequencies below 100 GHz if the internal quality factor remains sufficiently high when manganese is added to the film. To investigate, we measured some of the key properties of Al-Mn LEKIDs. A prototype eight-element LEKID array was fabricated using a 40 nm thick film of Al-Mn deposited on a 500 {\mu}m thick high-resistivity, float-zone silicon substrate. The manganese content was 900 ppm, the measured $T_c = 694\pm1$ mK, and the resonance frequencies were near 150 MHz. Using measurements of the forward scattering parameter $S_{21}$ at various bath temperatures between 65 and 250 mK, we determined that the Al-Mn LEKIDs we fabricated have internal quality factors greater than $2 \times 10^5$, which is high enough for millimeter-wave astrophysical observations. In the dark conditions under which these devices were measured, the fractional frequency noise spectrum shows a shallow slope that depends on bath temperature and probe tone amplitude, which could be two-level system noise. The anticipated white photon noise should dominate this level of low-frequency noise when the detectors are illuminated with millimeter-waves in future measurements. The LEKIDs responded to light pulses from a 1550 nm light-emitting diode, and we used these light pulses to determine that the quasiparticle lifetime is 60 {\mu}s., Comment: 5 pages, 4 figures. This revised version has been accepted for publication by Appl. Phys. Lett

Published
2017
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6. A Titanium Nitride Absorber for Controlling Optical Crosstalk in Horn-Coupled Aluminum LEKID Arrays for Millimeter Wavelengths

Author

McCarrick, H., Flanigan, D., Jones, G., Johnson, B. R., Ade, P. A. R., Bradford, K., Bryan, S., Cantor, R., Che, G., Day, P., Doyle, S., Leduc, H., Limon, M., Mauskopf, P., Miller, A., Mroczkowski, T., Tucker, C., and Zmuidzinas, J.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We discuss the design and measured performance of a titanium nitride (TiN) mesh absorber we are developing for controlling optical crosstalk in horn-coupled lumped-element kinetic inductance detector arrays for millimeter-wavelengths. This absorber was added to the fused silica anti-reflection coating attached to previously-characterized, 20-element prototype arrays of LEKIDs fabricated from thin-film aluminum on silicon substrates. To test the TiN crosstalk absorber, we compared the measured response and noise properties of LEKID arrays with and without the TiN mesh. For this test, the LEKIDs were illuminated with an adjustable, incoherent electronic millimeter-wave source. Our measurements show that the optical crosstalk in the LEKID array with the TiN absorber is reduced by 66\% on average, so the approach is effective and a viable candidate for future kilo-pixel arrays., Comment: 7 pages, 5 figures, accepted for publication in the Journal of Low Temperature Physics

Published
2015
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7. Horn-Coupled, Commercially-Fabricated Aluminum Lumped-Element Kinetic Inductance Detectors for Millimeter Wavelengths

Author

McCarrick, H., Flanigan, D., Jones, G., Johnson, B. R., Ade, P., Araujo, D., Bradford, K., Cantor, R., Che, G., Day, P., Doyle, S., Leduc, H., Limon, M., Luu, V., Mauskopf, P., Miller, A., Mroczkowski, T., Tucker, C., and Zmuidzinas, J.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We discuss the design, fabrication, and testing of prototype horn-coupled, lumped-element kinetic inductance detectors (LEKIDs) designed for cosmic microwave background (CMB) studies. The LEKIDs are made from a thin aluminum film deposited on a silicon wafer and patterned using standard photolithographic techniques at STAR Cryoelectronics, a commercial device foundry. We fabricated twenty-element arrays, optimized for a spectral band centered on 150 GHz, to test the sensitivity and yield of the devices as well as the multiplexing scheme. We characterized the detectors in two configurations. First, the detectors were tested in a dark environment with the horn apertures covered, and second, the horn apertures were pointed towards a beam-filling cryogenic blackbody load. These tests show that the multiplexing scheme is robust and scalable, the yield across multiple LEKID arrays is 91%, and the noise-equivalent temperatures (NET) for a 4 K optical load are in the range 26$\thinspace\pm6 \thinspace \mu \mbox{K} \sqrt{\mbox{s}}$.

Published
2014
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8. A LEKID-based CMB instrument design for large-scale observations in Greenland

Author

Araujo, D. C., Ade, P. A. R., Bond, J. R., Bradford, K. J., Chapman, D., Che, G., Day, P. K., Didier, J., Doyle, S., Eriksen, H. K., Flanigan, D., Groppi, C. E., Hillbrand, S. N., Johnson, B. R., Jones, G., Limon, M., Miller, A. D., Mauskopf, P., McCarrick, H., Mroczkowski, T., Reichborn-Kjennerud, B., Smiley, B., Sobrin, J., Wehus, I. K., and Zmuidzinas, J.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present the results of a feasibility study, which examined deployment of a ground-based millimeter-wave polarimeter, tailored for observing the cosmic microwave background (CMB), to Isi Station in Greenland. The instrument for this study is based on lumped-element kinetic inductance detectors (LEKIDs) and an F/2.4 catoptric, crossed-Dragone telescope with a 500 mm aperture. The telescope is mounted inside the receiver and cooled to $<\,4$ K by a closed-cycle $^4$He refrigerator to reduce background loading on the detectors. Linearly polarized signals from the sky are modulated with a metal-mesh half-wave plate that is rotated at the aperture stop of the telescope with a hollow-shaft motor based on a superconducting magnetic bearing. The modular detector array design includes at least 2300 LEKIDs, and it can be configured for spectral bands centered on 150~GHz or greater. Our study considered configurations for observing in spectral bands centered on 150, 210 and 267~GHz. The entire polarimeter is mounted on a commercial precision rotary air bearing, which allows fast azimuth scan speeds with negligible vibration and mechanical wear over time. A slip ring provides power to the instrument, enabling circular scans (360 degrees of continuous rotation). This mount, when combined with sky rotation and the latitude of the observation site, produces a hypotrochoid scan pattern, which yields excellent cross-linking and enables 34\% of the sky to be observed using a range of constant elevation scans. This scan pattern and sky coverage combined with the beam size (15~arcmin at 150~GHz) makes the instrument sensitive to $5 < \ell < 1000$ in the angular power spectra.

Published
2014
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9. The Detector System for the Stratospheric Kinetic Inductance Polarimeter (SKIP)

Author

Johnson, B. R., Ade, P. A. R., Araujo, D., Bradford, K. J., Chapman, D., Day, P. K., Didier, J., Doyle, S., Eriksen, H. K., Flanigan, D., Groppi, C., Hillbrand, S., Jones, G., Limon, M., Mauskopf, P., McCarrick, H., Miller, A., Mroczkowski, T., Reichborn-Kjennerud, B., Smiley, B., Sobrin, J., Wehus, I. K., and Zmuidzinas, J.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

The Stratospheric Kinetic Inductance Polarimeter (SKIP) is a proposed balloon-borne experiment designed to study the cosmic microwave background, the cosmic infrared background and Galactic dust emission by observing 1133 square degrees of sky in the Northern Hemisphere with launches from Kiruna, Sweden. The instrument contains 2317 single-polarization, horn-coupled, aluminum lumped-element kinetic inductance detectors (LEKID). The LEKIDs will be maintained at 100 mK with an adiabatic demagnetization refrigerator. The polarimeter operates in two configurations, one sensitive to a spectral band centered on 150 GHz and the other sensitive to 260 and 350 GHz bands. The detector readout system is based on the ROACH-1 board, and the detectors will be biased below 300 MHz. The detector array is fed by an F/2.4 crossed-Dragone telescope with a 500 mm aperture yielding a 15 arcmin FWHM beam at 150 GHz. To minimize detector loading and maximize sensitivity, the entire optical system will be cooled to 1 K. Linearly polarized sky signals will be modulated with a metal-mesh half-wave plate that is mounted at the telescope aperture and rotated by a superconducting magnetic bearing. The observation program consists of at least two, five-day flights beginning with the 150 GHz observations., Comment: J Low Temp Phys DOI 10.1007/s10909-013-1014-3 The final publication is available at link.springer.com

Published
2013
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13. A microwave SQUID multiplexer optimized for bolometric applications

Author

Dober, B., primary, Ahmed, Z., additional, Arnold, K., additional, Becker, D. T., additional, Bennett, D. A., additional, Connors, J. A., additional, Cukierman, A., additional, D'Ewart, J. M., additional, Duff, S. M., additional, Dusatko, J. E., additional, Frisch, J. C., additional, Gard, J. D., additional, Henderson, S. W., additional, Herbst, R., additional, Hilton, G. C., additional, Hubmayr, J., additional, Li, Y., additional, Mates, J. A. B., additional, McCarrick, H., additional, Reintsema, C. D., additional, Silva-Feaver, M., additional, Ruckman, L., additional, Ullom, J. N., additional, Vale, L. R., additional, Van Winkle, D. D., additional, Vasquez, J., additional, Wang, Y., additional, Young, E., additional, Yu, C., additional, and Zheng, K., additional

Published
2021
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14. Design and performance of dual-polarization lumped-element kinetic inductance detectors for millimeter-wave polarimetry

Author

McCarrick, H., primary, Jones, G., additional, Johnson, B. R., additional, Abitbol, M. H., additional, Ade, P. A. R., additional, Bryan, S., additional, Day, P., additional, Essinger-Hileman, T., additional, Flanigan, D., additional, Leduc, H. G., additional, Limon, M., additional, Mauskopf, P., additional, Miller, A., additional, and Tucker, C., additional

Published
2018
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15. High quality factor manganese-doped aluminum lumped-element kinetic inductance detectors sensitive to frequencies below 100 GHz

Author

Jones, G., primary, Johnson, B. R., additional, Abitbol, M. H., additional, Ade, P. A. R., additional, Bryan, S., additional, Cho, H.-M., additional, Day, P., additional, Flanigan, D., additional, Irwin, K. D., additional, Li, D., additional, Mauskopf, P., additional, McCarrick, H., additional, Miller, A., additional, Song, Y. R., additional, and Tucker, C., additional

Published
2017
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17. Photon noise from chaotic and coherent millimeter-wave sources measured with horn-coupled, aluminum lumped-element kinetic inductance detectors

Author

Flanigan, D., primary, McCarrick, H., additional, Jones, G., additional, Johnson, B. R., additional, Abitbol, M. H., additional, Ade, P., additional, Araujo, D., additional, Bradford, K., additional, Cantor, R., additional, Che, G., additional, Day, P., additional, Doyle, S., additional, Kjellstrand, C. B., additional, Leduc, H., additional, Limon, M., additional, Luu, V., additional, Mauskopf, P., additional, Miller, A., additional, Mroczkowski, T., additional, Tucker, C., additional, and Zmuidzinas, J., additional

Published
2016
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18. A Titanium Nitride Absorber for Controlling Optical Crosstalk in Horn-Coupled Aluminum LEKID Arrays for Millimeter Wavelengths

Author

McCarrick, H., primary, Flanigan, D., additional, Jones, G., additional, Johnson, B. R., additional, Ade, P. A. R., additional, Bradford, K., additional, Bryan, S., additional, Cantor, R., additional, Che, G., additional, Day, P., additional, Doyle, S., additional, Leduc, H., additional, Limon, M., additional, Mauskopf, P., additional, Miller, A., additional, Mroczkowski, T., additional, Tucker, C., additional, and Zmuidzinas, J., additional

Published
2015
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19. Horn-coupled, commercially-fabricated aluminum lumped-element kinetic inductance detectors for millimeter wavelengths

Author

McCarrick, H., primary, Flanigan, D., additional, Jones, G., additional, Johnson, B. R., additional, Ade, P., additional, Araujo, D., additional, Bradford, K., additional, Cantor, R., additional, Che, G., additional, Day, P., additional, Doyle, S., additional, Leduc, H., additional, Limon, M., additional, Luu, V., additional, Mauskopf, P., additional, Miller, A., additional, Mroczkowski, T., additional, Tucker, C., additional, and Zmuidzinas, J., additional

Published
2014
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20. A LEKID-based CMB instrument design for large-scale observations in Greenland

Author

Araujo, D. C., additional, Ade, P. A. R., additional, Bond, J. R., additional, Bradford, K. J., additional, Chapman, D., additional, Che, G., additional, Day, P. K., additional, Didier, J., additional, Doyle, S., additional, Eriksen, H. K., additional, Flanigan, D., additional, Groppi, C. E., additional, Hillbrand, Seth N., additional, Johnson, B. R., additional, Jones, G., additional, Limon, Michele, additional, Miller, A. D., additional, Mauskopf, P., additional, McCarrick, H., additional, Mroczkowski, T., additional, Reichborn-Kjennerud, B., additional, Smiley, B., additional, Sobrin, Joshua, additional, Wehus, I. K., additional, and Zmuidzinas, J., additional

Published
2014
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21. The Detector System for the Stratospheric Kinetic Inductance Polarimeter (Skip)

Author

Johnson, B. R., primary, Ade, P. A. R., additional, Araujo, D., additional, Bradford, K. J., additional, Chapman, D., additional, Day, P. K., additional, Didier, J., additional, Doyle, S., additional, Eriksen, H. K., additional, Flanigan, D., additional, Groppi, C., additional, Hillbrand, S., additional, Jones, G., additional, Limon, M., additional, Mauskopf, P., additional, McCarrick, H., additional, Miller, A., additional, Mroczkowski, T., additional, Reichborn-Kjennerud, B., additional, Smiley, B., additional, Sobrin, J., additional, Wehus, I. K., additional, and Zmuidzinas, J., additional

Published
2013
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22. A LEKID-based CMB instrument design for large-scale observations in Greenland

Author

Holland, Wayne S., Zmuidzinas, Jonas, Araujo, D. C., Ade, P. A. R., Bond, J. R., Bradford, K. J., Chapman, D., Che, G., Day, P. K., Didier, J., Doyle, S., Eriksen, H. K., Flanigan, D., Groppi, C. E., Hillbrand, Seth N., Johnson, B. R., Jones, G., Limon, Michele, Miller, A. D., Mauskopf, P., McCarrick, H., Mroczkowski, T., Reichborn-Kjennerud, B., Smiley, B., Sobrin, Joshua, Wehus, I. K., and Zmuidzinas, J.

Published
2014
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23. The Stratospheric Kinetic Inductance Polarimeter (SKIP)

Author

Flanigan, Daniel, Ade, P., Araujo, D., Bradford, K. J., Chapman, D., Che, G., Day, P., Didier, J., Doyle, S., Eriksen, H., Groppi, C. E., Hillbrand, S. N., Johnson, B., Jones, G., Michele Limon, Mauskopf, P., Mccarrick, H., Miller, A. D., Mroczkowski, T., Reichborn-Kjennerud, B., Smiley, B., Sobrin, J., Wehus, I. K., and Zmuidzinas, J.

24. CMB-S4

Author

Collaboration, The CMB-S4, Abazajian, Kevork, Addison, Graeme E., Adshead, Peter, Ahmed, Zeeshan, Akerib, Daniel, Ali, Aamir, Allen, Steven W., Alonso, David, Alvarez, Marcelo, Amin, Mustafa A., Anderson, Adam, Arnold, Kam S., Ashton, Peter, Baccigalupi, Carlo, Bard, Debbie, Barkats, Denis, Barron, Darcy, Barry, Peter S., Bartlett, James G., Thakur, Ritoban Basu, Battaglia, Nicholas, Bean, Rachel, Bebek, Chris, Bender, Amy N., Benson, Bradford A., Bianchini, Federico, Bischoff, Colin A., Bleem, Lindsey, Bock, James J., Bocquet, Sebastian, Boddy, Kimberly K., Bond, J. Richard, Borrill, Julian, Bouchet, François R., Brinckmann, Thejs, Brown, Michael L., Bryan, Sean, Buza, Victor, Byrum, Karen, Caimapo, Carlos Hervias, Calabrese, Erminia, Calafut, Victoria, Caldwell, Robert, Carlstrom, John E., Carron, Julien, Cecil, Thomas, Challinor, Anthony, Chang, Clarence L., Chinone, Yuji, Cho, Hsiao-Mei Sherry, Cooray, Asantha, Coulton, Will, Crawford, Thomas M., Crites, Abigail, Cukierman, Ari, Cyr-Racine, Francis-Yan, de Haan, Tijmen, Delabrouille, Jacques, Devlin, Mark, Di Valentino, Eleonora, Dierickx, Marion, Dobbs, Matt, Duff, Shannon, Dunkley, Jo, Dvorkin, Cora, Eimer, Joseph, Elleflot, Tucker, Errard, Josquin, Essinger-Hileman, Thomas, Fabbian, Giulio, Feng, Chang, Ferraro, Simone, Filippini, Jeffrey P., Flauger, Raphael, Flaugher, Brenna, Fraisse, Aurelien A., Frolov, Andrei, Galitzki, Nicholas, Gallardo, Patricio A., Galli, Silvia, Ganga, Ken, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Green, Daniel, Grin, Daniel, Grohs, Evan, Gualtieri, Riccardo, Gudmundsson, Jon E., Gullett, Ian, Gupta, Nikhel, Habib, Salman, Halpern, Mark, Halverson, Nils W., Hanany, Shaul, Harrington, Kathleen, Hasegawa, Masaya, Hasselfield, Matthew, Hazumi, Masashi, Heitmann, Katrin, Henderson, Shawn, Hensley, Brandon, Hill, Charles, Hill, J. Colin, Hlozek, Renée, Ho, Shuay-Pwu Patty, Hoang, Thuong, Holder, Gil, Holzapfel, William, Hood, John, Hubmayr, Johannes, Huffenberger, Kevin M., Hui, Howard, Irwin, Kent, Jeong, Oliver, Johnson, Bradley R., Jones, William C., Kang, Jae Hwan, Karkare, Kirit S., Katayama, Nobuhiko, Keskitalo, Reijo, Kisner, Theodore, Knox, Lloyd, Koopman, Brian J., Kosowsky, Arthur, Kovac, John, Kovetz, Ely D., Kuhlmann, Steve, Kuo, Chao-lin, Kusaka, Akito, Lähteenmäki, Anne, Lawrence, Charles R., Lee, Adrian T., Lewis, Antony, Li, Dale, Linder, Eric, Loverde, Marilena, Lowitz, Amy, Lubin, Phil, Madhavacheril, Mathew S., Mantz, Adam, Marques, Gabriela, Matsuda, Frederick, Mauskopf, Philip, McCarrick, Heather, McMahon, Jeffrey, Meerburg, P. Daniel, Melin, Jean-Baptiste, Menanteau, Felipe, Meyers, Joel, Millea, Marius, Mohr, Joseph, Moncelsi, Lorenzo, Monzani, Maria, Mroczkowski, Tony, Mukherjee, Suvodip, Nagy, Johanna, Namikawa, Toshiya, Nati, Federico, Natoli, Tyler, Newburgh, Laura, Niemack, Michael D., Nishino, Haruki, Nord, Brian, Novosad, Valentine, O'Brient, Roger, Padin, Stephen, Palladino, Steven, Partridge, Bruce, Petravick, Don, Pierpaoli, Elena, Pogosian, Levon, Prabhu, Karthik, Pryke, Clement, Puglisi, Giuseppe, Racine, Benjamin, Rahlin, Alexandra, Rao, Mayuri Sathyanarayana, Raveri, Marco, Reichardt, Christian L., Remazeilles, Mathieu, Rocha, Graca, Roe, Natalie A., Roy, Anirban, Ruhl, John E., Salatino, Maria, Saliwanchik, Benjamin, Schaan, Emmanuel, Schillaci, Alessandro, Schmitt, Benjamin, Schmittfull, Marcel M., Scott, Douglas, Sehgal, Neelima, Shandera, Sarah, Sherwin, Blake D., Shirokoff, Erik, Simon, Sara M., Slosar, Anze, Spergel, David, Germaine, Tyler St., Staggs, Suzanne T., Stark, Antony, Starkman, Glenn D., Stompor, Radek, Stoughton, Chris, Suzuki, Aritoki, Tajima, Osamu, Teply, Grant P., Thompson, Keith, Thorne, Ben, Timbie, Peter, Tomasi, Maurizio, Tristram, Matthieu, Tucker, Gregory, Umiltà, Caterina, van Engelen, Alexander, Vavagiakis, Eve M., Vieira, Joaquin D., Vieregg, Abigail G., Wagoner, Kasey, Wallisch, Benjamin, Wang, Gensheng, Watson, Scott, Westbrook, Ben, Whitehorn, Nathan, Wollack, Edward J., Wu, W. L. Kimmy, Xu, Zhilei, Yang, H. Y. Eric, Yasini, Siavash, Yefremenko, Volodymyr G., Yoon, Ki Won, Young, Edward, Yu, Cyndia, Zonca, Andrea, AstroParticule et Cosmologie (APC (UMR_7164)), 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), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CMB-S4, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris-Sud - Paris 11 (UP11), Apollo - University of Cambridge Repository, Van Swinderen Institute for Particle Physics and G, Cosmic Frontier, Abazajian, K, Addison, G, Adshead, P, Ahmed, Z, Akerib, D, Ali, A, Allen, S, Alonso, D, Alvarez, M, Amin, M, Anderson, A, Arnold, K, Ashton, P, Baccigalupi, C, Bard, D, Barkats, D, Barron, D, Barry, P, Bartlett, J, Basu Thakur, R, Battaglia, N, Bean, R, Bebek, C, Bender, A, Benson, B, Bianchini, F, Bischoff, C, Bleem, L, Bock, J, Bocquet, S, Boddy, K, Richard Bond, J, Borrill, J, Bouchet, F, Brinckmann, T, Brown, M, Bryan, S, Buza, V, Byrum, K, Hervias Caimapo, C, Calabrese, E, Calafut, V, Caldwell, R, Carlstrom, J, Carron, J, Cecil, T, Challinor, A, Chang, C, Chinone, Y, Sherry Cho, H, Cooray, A, Coulton, W, Crawford, T, Crites, A, Cukierman, A, Cyr-Racine, F, De Haan, T, Delabrouille, J, Devlin, M, Di Valentino, E, Dierickx, M, Dobbs, M, Duff, S, Dvorkin, C, Eimer, J, Elleflot, T, Errard, J, Essinger-Hileman, T, Fabbian, G, Feng, C, Ferraro, S, Filippini, J, Flauger, R, Flaugher, B, Fraisse, A, Frolov, A, Galitzki, N, Gallardo, P, Galli, S, Ganga, K, Gerbino, M, Gluscevic, V, Goeckner-Wald, N, Green, D, Grin, D, Grohs, E, Gualtieri, R, Gudmundsson, J, Gullett, I, Gupta, N, Habib, S, Halpern, M, Halverson, N, Hanany, S, Harrington, K, Hasegawa, M, Hasselfield, M, Hazumi, M, Heitmann, K, Henderson, S, Hensley, B, Hill, C, Colin Hill, J, Hlozek, R, Patty Ho, S, Hoang, T, Holder, G, Holzapfel, W, Hood, J, Hubmayr, J, Huffenberger, K, Hui, H, Irwin, K, Jeong, O, Johnson, B, Jones, W, Hwan Kang, J, Karkare, K, Katayama, N, Keskitalo, R, Kisner, T, Knox, L, Koopman, B, Kosowsky, A, Kovac, J, Kovetz, E, Kuhlmann, S, Kuo, C, Kusaka, A, Lahteenmaki, A, Lawrence, C, Lee, A, Lewis, A, Li, D, Linder, E, Loverde, M, Lowitz, A, Lubin, P, Madhavacheril, M, Mantz, A, Marques, G, Matsuda, F, Mauskopf, P, Mccarrick, H, Mcmahon, J, Daniel Meerburg, P, Melin, J, Menanteau, F, Meyers, J, Millea, M, Mohr, J, Moncelsi, L, Monzani, M, Mroczkowski, T, Mukherjee, S, Nagy, J, Namikawa, T, Nati, F, Natoli, T, Newburgh, L, Niemack, M, Nishino, H, Nord, B, Novosad, V, O'Brient, R, Padin, S, Palladino, S, Partridge, B, Petravick, D, Pierpaoli, E, Pogosian, L, Prabhu, K, Pryke, C, Puglisi, G, Racine, B, Rahlin, A, Sathyanarayana Rao, M, Raveri, M, Reichardt, C, Remazeilles, M, Rocha, G, Roe, N, Roy, A, Ruhl, J, Salatino, M, Saliwanchik, B, Schaan, E, Schillaci, A, Schmitt, B, Schmittfull, M, Scott, D, Sehgal, N, Shandera, S, Sherwin, B, Shirokoff, E, Simon, S, Slosar, A, Spergel, D, S, T, Staggs, S, Stark, A, Starkman, G, Stompor, R, Stoughton, C, Suzuki, A, Tajima, O, Teply, G, Thompson, K, Thorne, B, Timbie, P, Tomasi, M, Tristram, M, Tucker, G, Umilta, C, Van Engelen, A, Vavagiakis, E, Vieira, J, Vieregg, A, Wagoner, K, Wallisch, B, Wang, G, Watson, S, Westbrook, B, Whitehorn, N, Wollack, E, Kimmy Wu, W, Xu, Z, Eric Yang, H, Yasini, S, Yefremenko, V, Won Yoon, K, Young, E, Yu, C, Zonca, A, University of California Irvine, Johns Hopkins University, University of Illinois at Urbana-Champaign, SLAC National Accelerator Laboratory, University of California Berkeley, Stanford University, University of Oxford, Rice University, Fermi National Accelerator Laboratory, University of California San Diego, International School for Advanced Studies, Lawrence Berkeley National Laboratory, Harvard University, University of New Mexico, Argonne National Laboratory, Université Paris-Diderot, California Institute of Technology, Cornell University, University of Melbourne, University of Cincinnati, Ludwig Maximilian University of Munich, University of Toronto, UMR7095, Stony Brook University, University of Manchester, Arizona State University, Florida State University, Cardiff University, Dartmouth College, University of Geneva, University of Cambridge, The University of Tokyo, University of Groningen, University of Chicago, University of Pennsylvania, McGill University, National Institute of Standards and Technology, NASA Goddard Space Flight Center, University of Sussex, Princeton University, Simon Fraser University, National Institute for Nuclear Physics, Haverford College, Stockholm University, Case Western Reserve University, University of British Columbia, University of Colorado Boulder, University of Minnesota Twin Cities, University of Michigan, Ann Arbor, Simons Foundation, Columbia University, University of Virginia, University of California Davis, Yale University, University of Pittsburgh, Ben-Gurion University of the Negev, Department of Electronics and Nanoengineering, Jet Propulsion Laboratory, University of California Santa Barbara, Perimeter Institute for Theoretical Physics, Service d'Astrophysique CEA, European Southern Observatory, Washington University St. Louis, University of Milan - Bicocca, University of Southern California, Institute for Advanced Studies, Pennsylvania State University, Brookhaven National Laboratory, Kyoto University, University of Wisconsin-Madison, University of Milano, Université Paris-Saclay, Brown University, Syracuse University, University of California Los Angeles, Aalto-yliopisto, and Aalto University

Subjects
Astrophysics and Astronomy, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmology, CMB, Settore FIS/05, Space and Planetary Science, astro-ph.CO, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Galaxies and Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

CMB-S4---the next-generation ground-based cosmic microwave background (CMB) experiment---is set to significantly advance the sensitivity of CMB measurements and enhance our understanding of the origin and evolution of the Universe, from the highest energies at the dawn of time through the growth of structure to the present day. Among the science cases pursued with CMB-S4, the quest for detecting primordial gravitational waves is a central driver of the experimental design. This work details the development of a forecasting framework that includes a power-spectrum-based semi-analytic projection tool, targeted explicitly towards optimizing constraints on the tensor-to-scalar ratio, $r$, in the presence of Galactic foregrounds and gravitational lensing of the CMB. This framework is unique in its direct use of information from the achieved performance of current Stage 2--3 CMB experiments to robustly forecast the science reach of upcoming CMB-polarization endeavors. The methodology allows for rapid iteration over experimental configurations and offers a flexible way to optimize the design of future experiments given a desired scientific goal. To form a closed-loop process, we couple this semi-analytic tool with map-based validation studies, which allow for the injection of additional complexity and verification of our forecasts with several independent analysis methods. We document multiple rounds of forecasts for CMB-S4 using this process and the resulting establishment of the current reference design of the primordial gravitational-wave component of the Stage-4 experiment, optimized to achieve our science goals of detecting primordial gravitational waves for $r > 0.003$ at greater than $5��$, or, in the absence of a detection, of reaching an upper limit of $r < 0.001$ at $95\%$ CL., 24 pages, 8 figures, 9 tables, submitted to ApJ. arXiv admin note: text overlap with arXiv:1907.04473

Published
2022

25. The Simons Observatory: Galactic Science Goals and Forecasts

Author

Brandon S. Hensley, Susan E. Clark, Valentina Fanfani, Nicoletta Krachmalnicoff, Giulio Fabbian, Davide Poletti, Giuseppe Puglisi, Gabriele Coppi, Jacob Nibauer, Roman Gerasimov, Nicholas Galitzki, Steve K. Choi, Peter C. Ashton, Carlo Baccigalupi, Eric Baxter, Blakesley Burkhart, Erminia Calabrese, Jens Chluba, Josquin Errard, Andrei V. Frolov, Carlos Hervías-Caimapo, Kevin M. Huffenberger, Bradley R. Johnson, Baptiste Jost, Brian Keating, Heather McCarrick, Federico Nati, Mayuri Sathyanarayana Rao, Alexander van Engelen, Samantha Walker, Kevin Wolz, Zhilei Xu, Ningfeng Zhu, Andrea Zonca, Hensley, B, Clark, S, Fanfani, V, Krachmalnicoff, N, Fabbian, G, Poletti, D, Puglisi, G, Coppi, G, Nibauer, J, Gerasimov, R, Galitzki, N, Choi, S, Ashton, P, Baccigalupi, C, Baxter, E, Burkhart, B, Calabrese, E, Chluba, J, Errard, J, Frolov, A, Herv??as-Caimapo, C, Huffenberger, K, Johnson, B, Jost, B, Keating, B, Mccarrick, H, Nati, F, Sathyanarayana Rao, M, van Engelen, A, Walker, S, Wolz, K, Xu, Z, Zhu, N, Zonca, A, AstroParticule et Cosmologie (APC (UMR_7164)), 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), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, Oort cloud object, Interstellar magnetic field, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Magnetohydrodynamic, Interstellar molecule, Astrophysics - Astrophysics of Galaxies, Interstellar synchrotron emission, Cosmic microwave background radiation, Starlight polarization, Settore FIS/05 - Astronomia e Astrofisica, Space and Planetary Science, Interstellar medium, Astrophysics of Galaxies (astro-ph.GA), Polarimetry, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Interstellar dust
Abstract

Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised to address many questions in Galactic astrophysics in addition to its principal cosmological goals. In this work, we provide quantitative forecasts on astrophysical parameters of interest for a range of Galactic science cases. We find that SO can: constrain the frequency spectrum of polarized dust emission at a level of $\Delta\beta_d \lesssim 0.01$ and thus test models of dust composition that predict that $\beta_d$ in polarization differs from that measured in total intensity; measure the correlation coefficient between polarized dust and synchrotron emission with a factor of two greater precision than current constraints; exclude the non-existence of exo-Oort clouds at roughly 2.9$\sigma$ if the true fraction is similar to the detection rate of giant planets; map more than 850 molecular clouds with at least 50 independent polarization measurements at 1 pc resolution; detect or place upper limits on the polarization fractions of CO(2-1) emission and anomalous microwave emission at the 0.1% level in select regions; and measure the correlation coefficient between optical starlight polarization and microwave polarized dust emission in $1^\circ$ patches for all lines of sight with $N_{\rm H} \gtrsim 2\times10^{20}$ cm$^{-2}$. The goals and forecasts outlined here provide a roadmap for other microwave polarization experiments to expand their scientific scope via Milky Way astrophysics., Comment: Submitted to AAS journals. 33 pages, 10 figures

Published
2022

26. Simons Observatory Small Aperture Telescope overview

Author

Heather McCarrick, Osamu Tajima, Yuji Chinone, Jon E. Gudmundsson, Nicholas Galitzki, Federico Nati, Gabriele Coppi, Andrew Bazako, Joseph Seibert, Kevin D. Crowley, Jason E. Austermann, Masaya Hasegawa, Grant Teply, Jacob Spisak, Tran Tsan, Bradley R. Johnson, Edward J. Wollack, Giulio Fabbian, Brian Keating, Simon Dicker, Mario Zannoni, Mayuri Sathyanarayana Rao, Yume Nishinomiya, Frederick Matsuda, Kam Arnold, Shunsuke Adachi, Ningfeng Zhu, Charles A. Hill, James A. Beall, Tomoki Terasaki, D. Kaneko, Akito Kusaka, Kevin T. Crowley, Bradley Dober, Samantha Walker, Lyman A. Page, Adrian T. Lee, Kenji Kiuchi, Kathleen Harrington, Shuay-Pwu Patty Ho, Nobuhiko Katayama, Makoto Hattori, Peter Ashton, Johannes Hubmayr, Joseph E. Golec, Kana Sakaguri, Masaaki Murata, Shannon M. Duff, Kyohei Yamada, Zhilei Xu, Yuki Sakurai, Jack Lashner, Christian L. Reichardt, Aamir Ali, Marshall, HK, Spyromilio, J, Usuda, T, Kiuchi, K, Adachi, S, Ali, A, Arnold, K, Ashton, P, Austermann, J, Bazako, A, Beall, J, Chinone, Y, Coppi, G, Crowley, K, Dicker, S, Dober, B, Duff, S, Fabbian, G, Galitzki, N, Golec, J, Gudmundsson, J, Harrington, K, Hasegawa, M, Hattori, M, Hill, C, Ho, S, Hubmayr, J, Johnson, B, Kaneko, D, Katayama, N, Keating, B, Kusaka, A, Lashner, J, Lee, A, Matsuda, F, Mccarrick, H, Murata, M, Nati, F, Nishinomiya, Y, Page, L, Rao, M, Reichardt, C, Sakaguri, K, Sakurai, Y, Sibert, J, Spisak, J, Tajima, O, Teply, G, Terasaki, T, Tsan, T, Walker, S, Wollack, E, Xu, Z, Yamada, K, Zannoni, M, and Zhu, N

Subjects
Aperture, Cosmic microwave background, FOS: Physical sciences, Field of view, Astrophysics::Cosmology and Extragalactic Astrophysics, CMB, law.invention, Telescope, FIS/05 - ASTRONOMIA E ASTROFISICA, Optics, law, Observatory, Cosmic Microwave Background, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, business.industry, Gravitational wave, Stray light, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Radio, Primordial gravitational wave, B-mode, Ground-Based Telescope, business, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Simons Observatory (SO) is a cosmic microwave background (CMB) experiment from the Atacama Desert in Chile comprising three small-aperture telescopes (SATs) and one large-aperture telescope (LAT). In total, SO will field over 60,000 transition-edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz in order to achieve the sensitivity necessary to measure or constrain numerous cosmological quantities. In this work, we focus on the SATs which are optimized to search for primordial gravitational waves that are detected as parity-odd polarization patterns called a B-modes on degree scales in the CMB. Each SAT employs a single optics tube with TES arrays operating at 100 mK. The high throughput optics system has a 42 cm aperture and a 35-degree field of view coupled to a 36 cm diameter focal plane. The optics consist of three metamaterial anti-re ection coated silicon lenses. Cryogenic ring baffles with engineered blackbody absorbers are installed in the optics tube to minimize the stray light. The entire optics tube is cooled to 1 K. A cryogenic continuously rotating half-wave plate near the sky side of the aperture stop helps to minimize the effect of atmospheric uctuations. The telescope warm baffling consists of a forebaffle, an elevation stage mounted co-moving shield, and a fixed ground shield that together control the far side-lobes and mitigates ground-synchronous systematics. We present the status of the SAT development., Comment: 8 pages, 6 figures

Published
2021
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27. The Simons Observatory: Magnetic Sensitivity Measurements of Microwave SQUID Multiplexers

Author

Jake Connors, Zhilei Xu, Aamir Ali, Suzanne T. Staggs, Simon Dicker, Kasey Wagoner, Eve M. Vavagiakis, Jason E. Austermann, Steve K. Choi, Gene C. Hilton, Maximiliano Silva-Feaver, Yaqiong Li, Michael D. Niemack, Ningfeng Zhu, Jason R. Stevens, Johannes Hubmayr, Kam Arnold, Michael R. Vissers, Erin Healy, Nicholas F. Cothard, Zeeshan Ahmed, Sarah Marie Bruno, Shawn W. Henderson, Joel N. Ullom, Nicoletta Krachmalnicoff, B. Dober, Shannon M. Duff, Shuay-Pwu Patty Ho, Heather McCarrick, Valentina Fanfani, John A. B. Mates, Federico Nati, Duc-Thuong Hoang, Vavagiakis, E, Ahmed, Z, Ali, A, Arnold, K, Austermann, J, Bruno, S, Choi, S, Connors, J, Cothard, N, Dicker, S, Dober, B, Duff, S, Fanfani, V, Healy, E, Henderson, S, Ho, S, Hoang, D, Hilton, G, Hubmayr, J, Krachmalnicoff, N, Li, Y, Mates, J, Mccarrick, H, Nati, F, Niemack, M, Silva-Feaver, M, Staggs, S, Stevens, J, Vissers, M, Ullom, J, Wagoner, K, Xu, Z, and Zhu, N

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, Cosmic microwave background, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Lenslet, SQUID, 01 natural sciences, 7. Clean energy, microwave multiplexing, law.invention, Telescope, Optics, Settore FIS/05 - Astronomia e Astrofisica, law, Observatory, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, business.industry, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, supercondcuting detector, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Electromagnetic shielding, supercondcuting detectors, Astrophysics - Instrumentation and Methods for Astrophysics, business, SQUIDs, Microwave, Astrophysics - Cosmology and Nongalactic Astrophysics, Magnetic field dependence
Abstract

The Simons Observatory (SO) will be a cosmic microwave background (CMB) survey experiment with three small-aperture telescopes and one large-aperture telescope, which will observe from the Atacama Desert in Chile. In total, SO will field $\sim$70,000 transition-edge sensor (TES) bolometers in six spectral bands centered between 27 and 280 GHz in order to achieve the sensitivity necessary to measure or constrain numerous cosmological quantities. The SO Universal Focal Plane Modules (UFMs) each contain a 150 mm diameter TES detector array, horn or lenslet optical coupling, cold readout components, and magnetic shielding. SO will use a microwave SQUID multiplexing ($\mu$MUX) readout at an initial multiplexing factor of $\sim$1000; the cold (100 mK) readout components are packaged in a $\mu$MUX readout module, which is part of the UFM, and can also be characterized independently. The 100 mK stage TES bolometer arrays and microwave SQUIDs are sensitive to magnetic fields, and their measured response will vary with the degree to which they are magnetically shielded. We present measurements of the magnetic pickup of test microwave SQUID multiplexers as a study of various shielding configurations for the Simons Observatory. We discuss how these measurements motivated the material choice and design of the UFM magnetic shielding., Comment: 5 pages, 6 figures, conference proceedings submitted to IEEE Transactions on Applied Superconductivity

Published
2021

28. The Simons Observatory: the Large Aperture Telescope Receiver (LATR) Integration and Validation Results

Author

Suzanne T. Staggs, Jenna Moore, Jake Connors, John Orlowski-Scherer, Steve K. Choi, Federico Nati, Michael D. Niemack, Erin Healy, Ningfeng Zhu, Joseph Seibert, Bradley Dober, Robert Thornton, Brian J. Koopman, Zhilei Xu, Johannes Hubmayr, Jack Lashner, Tanay Bhandarkar, Christian L. Reichardt, Nicholas F. Cothard, Jason E. Austermann, Giulio Fabbian, Shuay-Pwu Patty Ho, Edward J. Wollack, Gabriele Coppi, Yuhan Wang, Michele Limon, Jeffrey Iuliano, Mark J. Devlin, Kathleen Harrington, Kaiwen Zheng, Shannon M. Duff, Kam Arnold, Heather McCarrick, Samantha Walker, Simon Dicker, Eve M. Vavagiakis, Maximiliano Silva-Feaver, Nicholas Galitzki, A. M. Kofman, Rita Sonka, Michael R. Vissers, Karen Perez Sarmiento, Yaqiong Li, Aamir Ali, Saianeesh K. Haridas, Zmuidzinas J.,Gao J.-R., Xu, Z, Bhandarkar, T, Coppi, G, Kofman, A, Orlowski-Scherer, J, Zhu, N, Ali, A, Arnold, K, Austermann, J, Choi, S, Connors, J, Cothard, N, Devlin, M, Dicker, S, Dober, B, Duff, S, Fabbian, G, Galitzki, N, Haridas, S, Harrington, K, Healy, E, Ho, S, Hubmayr, J, Iuliano, J, Lashner, J, Li, Y, Limon, M, Koopman, B, Mccarrick, H, Moore, J, Nati, F, Niemack, M, Reichardt, C, Sarmiento, K, Seibert, J, Silva-Feaver, M, Sonka, R, Staggs, S, Thornton, R, Vavagiakis, E, Vissers, M, Walker, S, Wang, Y, Wollack, E, and Zheng, K

Subjects
Physics, COSMIC cancer database, Astrophysics::High Energy Astrophysical Phenomena, Cosmic microwave background, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Observa-tional Cosmology, Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Radio spectrum, Cryogenic Technology, law.invention, Astronomical Instrumentation, Telescope, law, Observatory, Observational cosmology, Cosmic Microwave Background, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The Simons Observatory (SO) will observe the cosmic microwave background (CMB) from Cerro Toco in the Atacama Desert of Chile. The observatory consists of three 0.5 m Small Aperture Telescopes (SATs) and one 6 m Large Aperture Telescope (LAT), covering six frequency bands centering around 30, 40, 90, 150, 230, and 280 GHz. The SO observations will transform the understanding of our universe by characterizing the properties of the early universe, measuring the number of relativistic species and the mass of neutrinos, improving our understanding of galaxy evolution, and constraining the properties of cosmic reionization. As a critical instrument, the Large Aperture Telescope Receiver (LATR) is designed to cool $\sim$ 60,000 transition-edge sensors (TES) to $, Comment: 20 pages, 12 figures, submitted to the 2020 SPIE Astronomical Telescopes + Instrumentation

Published
2020

29. Small Aperture Telescopes for the Simons Observatory

Author

Osamu Tajima, Johannes Hubmayr, Suzanne T. Staggs, Aamir Ali, Bejamin Westbrook, Kam Arnold, Trevor Sasse, Charles A. Hill, Frederick Matsuda, Tran Tsan, Kenji Kiuchi, Grant Teply, Andrew Bazarko, Federico Nati, Yuji Chinone, Joseph Seibert, Carlos Sierra, Nicholas Galitzki, Zhilei Xu, Peter Ashton, Ningfeng Zhu, Erin Healy, Haruki Nishino, Sara M. Simon, Shannon M. Duff, Kevin D. Crowley, Mario Zannoni, Edward J. Wollack, Jacob Spisak, Michael D. Niemack, John Orlowski-Scherer, Christopher Raum, Lance Corbett, Adrian T. Lee, Aashrita Mangu, Kathleen Harrington, Michael Ludlam, Yuki Sakurai, Shunsuke Adachi, Gabriele Coppi, Maria Salatino, Neil Goeckner-Wald, Mayuri Sathyanarayana Rao, Maximiliano Silva-Feaver, Mark J. Devlin, Christopher G. Ellis, Heather McCarrick, Kevin T. Crowley, Shuay-Pwu Patty Ho, Akito Kusaka, Brian Keating, Simon Dicker, Ali, A, Adachi, S, Arnold, K, Ashton, P, Bazarko, A, Chinone, Y, Coppi, G, Corbett, L, Crowley, K, Devlin, M, Dicker, S, Duff, S, Ellis, C, Galitzki, N, Goeckner-Wald, N, Harrington, K, Healy, E, Hill, C, Ho, S, Hubmayr, J, Keating, B, Kiuchi, K, Kusaka, A, Lee, A, Ludlam, M, Mangu, A, Matsuda, F, Mccarrick, H, Nati, F, Niemack, M, Nishino, H, Orlowski-Scherer, J, Sathyanarayana Rao, M, Raum, C, Sakurai, Y, Salatino, M, Sasse, T, Seibert, J, Sierra, C, Silva-Feaver, M, Spisak, J, Simon, S, Staggs, S, Tajima, O, Teply, G, Tsan, T, Wollack, E, Westbrook, B, Xu, Z, Zannoni, M, and Zhu, N

Subjects
Small aperture telescope, TES, Refractor, Simons Observatory, Cosmic microwave background, CMB, Inflation, Cosmology, media_common.quotation_subject, Cosmic microwave background, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmology, Radio spectrum, 010305 fluids & plasmas, law.invention, Telescope, FIS/05 - ASTRONOMIA E ASTROFISICA, law, Observatory, 0103 physical sciences, General Materials Science, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, media_common, Physics, Astrophysics::Instrumentation and Methods for Astrophysics, Condensed Matter Physics, Polarization (waves), Atomic and Molecular Physics, and Optics, Sky, Refracting telescope, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Simons Observatory (SO) is an upcoming cosmic microwave background (CMB) experiment located on Cerro Toco, Chile, that will map the microwave sky in temperature and polarization in six frequency bands spanning 27 to 285 GHz. SO will consist of one 6-m large aperture telescope fielding $$\sim$$ 30,000 detectors and an array of three 0.42-m small aperture telescopes (SATs) fielding an additional 30,000 detectors. This synergy will allow for the extremely sensitive characterization of the CMB over angular scales ranging from an arcmin to tens of degrees, enabling a wide range of scientific output. Here we focus on the SATs targeting degree angular scales with successive dichroic instruments observing at mid-frequency (MF: 93/145 GHz), ultra-high-frequency (UHF: 225/285 GHz), and low-frequency (LF: 27/39 GHz). The three SATs will be able to map $$\sim$$ 10% of the sky to a noise level of $$\sim$$ $$2\,\upmu {\hbox {K}}$$ -arcmin when combining 93 and 145 GHz. The multiple frequency bands will allow the CMB to be separated from galactic foregrounds (primarily synchrotron and dust), with the primary science goal of characterizing the primordial tensor-to-scalar ratio, r, at a target level of $$\sigma (r) \approx 0.003$$ .

Published
2020

30. The Simons Observatory: gain, bandpass and polarization-angle calibration requirements for B-mode searches

Author

Valentina Fanfani, Mario Zannoni, Mark J. Devlin, J. Colin Hill, Josquin Errard, Aritoki Suzuki, Gabriele Coppi, Edward J. Wollack, Julien Carron, Adrian T. Lee, Thibaut Louis, Davide Poletti, Mathew S. Madhavacheril, Michael L. Brown, Baptiste Jost, Brian Keating, Federico Nati, P. Daniel Meerburg, S. Azzoni, Maximilian H. Abitbol, Haruki Nishino, Sara M. Simon, Michael J. Randall, Jacob Spisak, Lyman A. Page, Bradley R. Johnson, Jo Dunkley, Yuji Chinone, Aamir Ali, David Alonso, Grant Teply, Jeff McMahon, Carlo Baccigalupi, Clara Vergès, Jens Chluba, Aditya Rotti, Giuseppe Puglisi, Nicholas Galitzki, Kevin D. Crowley, Martina Gerbino, Zhilei Xu, Jack Lashner, Erminia Calabrese, Kevin T. Crowley, Darcy Barron, Akito Kusaka, Nicoletta Krachmalnicoff, Heather McCarrick, AstroParticule et Cosmologie (APC (UMR_7164)), 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 de Paris (UP), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Van Swinderen Institute for Particle Physics and G, High-Energy Frontier, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), ANR-17-CE31-0022,BxB,Champs B interstellaires et modes B de l'inflation(2017), ANR-17-CE23-0002,B3DCMB,Big Bang à partir de Big Data (du fond diffus cosmologique)(2017), Abitbol, M, Alonso, D, Simon, S, Lashner, J, Crowley, K, Ali, A, Azzoni, S, Baccigalupi, C, Barron, D, Brown, M, Calabrese, E, Carron, J, Chinone, Y, Chluba, J, Coppi, G, Devlin, M, Dunkley, J, Errard, J, Fanfani, V, Galitzki, N, Gerbino, M, Colin Hill, J, Johnson, B, Jost, B, Keating, B, Krachmalnicoff, N, Kusaka, A, Lee, A, Louis, T, Madhavacheril, M, Mccarrick, H, Mcmahon, J, Daniel Meerburg, P, Nati, F, Nishino, H, Page, L, Poletti, D, Puglisi, G, Randall, M, Rotti, A, Spisak, J, Suzuki, A, Teply, G, Vergès, C, Wollack, E, Xu, Z, and Zannoni, M

Subjects
CMBR polarisation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Calibration (statistics), Cosmic microwave background, FOS: Physical sciences, Parameter space, Residual, Atomic, 01 natural sciences, Particle and Plasma Physics, Settore FIS/05 - Astronomia e Astrofisica, Band-pass filter, Observatory, 0103 physical sciences, CMBR experiments, Nuclear, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, CMBR polarization, Physics, Settore FIS/05, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, cosmological parameters from CMBR, Molecular, Astronomy and Astrophysics, Polarization (waves), Nuclear & Particles Physics, gravitational waves and CMBR polarization, Computational physics, astro-ph.CO, CMBR experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Instrumentation and Methods for Astrophysics, Focus (optics), Astronomical and Space Sciences, astro-ph.IM, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We quantify the calibration requirements for systematic uncertainties for next-generation ground-based observatories targeting the large-angle $B$-mode polarization of the Cosmic Microwave Background, with a focus on the Simons Observatory (SO). We explore uncertainties on gain calibration, bandpass center frequencies, and polarization angles, including the frequency variation of the latter across the bandpass. We find that gain calibration and bandpass center frequencies must be known to percent levels or less to avoid biases on the tensor-to-scalar ratio $r$ on the order of $\Delta r\sim10^{-3}$, in line with previous findings. Polarization angles must be calibrated to the level of a few tenths of a degree, while their frequency variation between the edges of the band must be known to ${\cal O}(10)$ degrees. Given the tightness of these calibration requirements, we explore the level to which residual uncertainties on these systematics would affect the final constraints on $r$ if included in the data model and marginalized over. We find that the additional parameter freedom does not degrade the final constraints on $r$ significantly, broadening the error bar by ${\cal O}(10\%)$ at most. We validate these results by reanalyzing the latest publicly available data from the BICEP2/Keck collaboration within an extended parameter space covering both cosmological, foreground and systematic parameters. Finally, our results are discussed in light of the instrument design and calibration studies carried out within SO., Comment: 41 pages, 18 figures

Published
2021

35. New style surgery.

Author

McCarrick H

Subjects
London, Partnership Practice, Family Practice, Nurses statistics & numerical data
Published
1974

36. Salmon versus the doctors.

Author

McCarrick H

Subjects
Hospital Administration, Interprofessional Relations, Nurse-Patient Relations, Nursing Staff, Hospital, Medical Staff, Hospital, Nursing, Supervisory
Published
1974

38. Men in midwifery.

Author

McCarrick H

Subjects
Female, Humans, Male, Pregnancy, Scotland, Workforce, Midwifery, Nurses, Male
Published
1974

39. A hundred years on.

Author

McCarrick H

Subjects
History, 19th Century, History, 20th Century, London, Hospitals history, Temperature
Published
1973

44. Changing gear.

Author

McCarrick H

Subjects
United Kingdom, Clothing, Nursing Staff, Hospital
Published
1973

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