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1. High-resolution spectroscopy of gaseous $^\mathrm{83m}$Kr conversion electrons with the KATRIN experiment

Author

Altenmüller, K., Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Block, F., Bobien, S., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Hickford, S., Hilk, D., Hillesheimer, D., Hinz, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Plischke, P., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., Zadoroghny, S., and Zeller, G.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

In this work, we present the first spectroscopic measurements of conversion electrons originating from the decay of metastable gaseous $^\mathrm{83m}$Kr with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The results obtained in this calibration measurement represent a major commissioning milestone for the upcoming direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the full KATRIN beamline. The KATRIN main spectrometer's excellent energy resolution of ~ 1 eV made it possible to determine the narrow K-32 and L$_3$-32 conversion electron line widths with an unprecedented precision of ~ 1 %., Comment: Fixed affiliation of the corresponding author

Published
2019
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2. Gamma-induced background in the KATRIN main spectrometer

Author

Altenmüller, K., Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Berlev, A., Besserer, U., Blaum, K., Block, F., Bobien, S., Bode, T., Bornschein, B., Bornschein, L., Bouquet, H., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A., Huber, A., Jansen, A., Karl, C., Kellerer, J., Kernert, N., Kippenbrock, L., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, A., Kraus, M., Lasserre, T., Lebeda, O., Lehnert, B., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schlüter, L., Schrank, M., Seitz-Moskaliuk, H., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Tcherniakhovski, D., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., Zadoroghny, S., and Zeller, G.

Subjects
Physics - Instrumentation and Detectors
Abstract

The KATRIN experiment aims to measure the effective electron antineutrino mass $m_{\overline{\nu}_e}$ with a sensitivity of 0.2 eV/c$^2$ using a gaseous tritium source combined with the MAC-E filter technique. A low background rate is crucial to achieving the proposed sensitivity, and dedicated measurements have been performed to study possible sources of background electrons. In this work, we test the hypothesis that gamma radiation from external radioactive sources significantly increases the rate of background events created in the main spectrometer (MS) and observed in the focal-plane detector. Using detailed simulations of the gamma flux in the experimental hall, combined with a series of experimental tests that artificially increased or decreased the local gamma flux to the MS, we set an upper limit of 0.006 count/s (90% C.L.) from this mechanism. Our results indicate the effectiveness of the electrostatic and magnetic shielding used to block secondary electrons emitted from the inner surface of the MS.

Published
2019
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3. The KATRIN Superconducting Magnets: Overview and First Performance Results

Author

Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, n W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, uE., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

The KATRIN experiment aims for the determination of the effective electron anti-neutrino mass from the tritium beta-decay with an unprecedented sub-eV sensitivity. The strong magnetic fields, designed for up to 6~T, adiabatically guide $\beta$-electrons from the source to the detector within a magnetic flux of 191~Tcm$^2$. A chain of ten single solenoid magnets and two larger superconducting magnet systems have been designed, constructed, and installed in the 70-m-long KATRIN beam line. The beam diameter for the magnetic flux varies from 0.064~m to 9~m, depending on the magnetic flux density along the beam line. Two transport and tritium pumping sections are assembled with chicane beam tubes to avoid direct "line-of-sight" molecular beaming effect of gaseous tritium molecules into the next beam sections. The sophisticated beam alignment has been successfully cross-checked by electron sources. In addition, magnet safety systems were developed to protect the complex magnet systems against coil quenches or other system failures. The main functionality of the magnet safety systems has been successfully tested with the two large magnet systems. The complete chain of the magnets was operated for several weeks at 70$\%$ of the design fields for the first test measurements with radioactive krypton gas. The stability of the magnetic fields of the source magnets has been shown to be better than 0.01$\%$ per month at 70$\%$ of the design fields. This paper gives an overview of the KATRIN superconducting magnets and reports on the first performance results of the magnets.

Published
2018
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4. Muon-induced background in the KATRIN main spectrometer

Author

Altenmüller, K., Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bobien, S., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Leiber, B., Letnev, J., Linek, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Rink, R., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Rovedo, P., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Wandkowsky, N., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., Zadoroghny, S., and Zeller, G.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to make a model-independent determination of the effective electron antineutrino mass with a sensitivity of 0.2 eV/c$^{2}$. It investigates the kinematics of $\beta$-particles from tritium $\beta$-decay close to the endpoint of the energy spectrum. Because the KATRIN main spectrometer (MS) is located above ground, muon-induced backgrounds are of particular concern. Coincidence measurements with the MS and a scintillator-based muon detector system confirmed the model of secondary electron production by cosmic-ray muons inside the MS. Correlation measurements with the same setup showed that about $12\%$ of secondary electrons emitted from the inner surface are induced by cosmic-ray muons, with approximately one secondary electron produced for every 17 muon crossings. However, the magnetic and electrostatic shielding of the MS is able to efficiently suppress these electrons, and we find that muons are responsible for less than $17\%$ ($90\%$ confidence level) of the overall MS background.

Published
2018
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5. Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment

Author

KATRIN Collaboration, Arenz, M., Baek, W. -J., Bauer, S., Beck, M., Beglarian, A., Behrens, J., Berendes, R., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buglak, W., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Furse, D., Gil, W., Glück, F., Urena, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Wandkowsky, N., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of $0.2\,{\text{eV}/c^2}$ (90\% C.L.) by precision measurement of the shape of the tritium \textbeta-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. A common background source in this setup is the decay of short-lived isotopes, such as $\textsuperscript{219}$Rn and $\textsuperscript{220}$Rn, in the spectrometer volume. Active and passive countermeasures have been implemented and tested at the KATRIN main spectrometer. One of these is the magnetic pulse method, which employs the existing air coil system to reduce the magnetic guiding field in the spectrometer on a short timescale in order to remove low- and high-energy stored electrons. Here we describe the working principle of this method and present results from commissioning measurements at the main spectrometer. Simulations with the particle-tracking software Kassiopeia were carried out to gain a detailed understanding of the electron storage conditions and removal processes., Comment: 16 pages, 9 figures, 4 tables

Published
2018
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6. Background model for the NaI(Tl) crystals in COSINE-100

Author

Adhikari, P., Adhikari, G., de Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W. G., Kauer, M., Kang, W. S., Kim, B. H., Kim, H., Kim, H. J., Kim, K. W., Kim, M. C., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Kudryavtsev, V. A., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Leonard, D. S., Lynch, W. A., Maruyama, R. H., Mouton, F., Olsen, S. L., Park, H. K., Park, H. S., Park, J. S., Park, K. S., Pettus, W., Prihtiadi, H., Ra, S., Rott, C., Scarff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., and Yong, S. H.

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

The COSINE-100 dark matter search experiment is an array of NaI(Tl) crystal detectors located in the Yangyang Underground Laboratory (Y2L). To understand measured backgrounds in the NaI(Tl) crystals we have performed Monte Carlo simulations using the Geant4 toolkit and developed background models for each crystal that consider contributions from both internal and external sources, including cosmogenic nuclides. The background models are based on comparisons of measurement data with Monte Carlo simulations that are guided by a campaign of material assays and are used to evaluate backgrounds and identify their sources. The average background level for the six crystals (70 kg total mass) that are studied is 3.5 counts/day/keV/kg in the (2-6) keV energy interval. The dominant contributors in this energy region are found to be $^{210}$Pb and $^3$H.

Published
2018
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7. Calibration of high voltages at the ppm level by the difference of $^{83\mathrm{m}}$Kr conversion electron lines at the KATRIN experiment

Author

Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Fischer, S., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at -18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage dividers were developed and built in cooperation with the German national metrology institute Physikalisch-Technische Bundesanstalt (PTB). Until now, regular absolute calibration of the voltage dividers required bringing the equipment to the specialised metrology laboratory. Here we present a new method based on measuring the energy difference of two $^{83\mathrm{m}}$Kr conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN's commissioning measurements in July 2017. The measured scale factor $M=1972.449(10)$ of the high-voltage divider K35 is in agreement with the last PTB calibration four years ago. This result demonstrates the utility of the calibration method, as well as the long-term stability of the voltage divider., Comment: 7 pages, 5 figures

Published
2018
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8. First transmission of electrons and ions through the KATRIN beamline

Author

Arenz, M., Baek, W. -J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Fischer, S., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Naumann, U., Neumann, H., Niemes, S., Off, A., Ortjohann, H. -W., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C. -O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Karlsruhe Tritium Neutrino (KATRIN) experiment is a large-scale effort to probe the absolute neutrino mass scale with a sensitivity of 0.2 eV (90% confidence level), via a precise measurement of the endpoint spectrum of tritium beta decay. This work documents several KATRIN commissioning milestones: the complete assembly of the experimental beamline, the successful transmission of electrons from three sources through the beamline to the primary detector, and tests of ion transport and retention. In the First Light commissioning campaign of Autumn 2016, photoelectrons were generated at the rear wall and ions were created by a dedicated ion source attached to the rear section; in July 2017, gaseous Kr-83m was injected into the KATRIN source section, and a condensed Kr-83m source was deployed in the transport section. In this paper we describe the technical details of the apparatus and the configuration for each measurement, and give first results on source and system performance. We have successfully achieved transmission from all four sources, established system stability, and characterized many aspects of the apparatus., Comment: Minor updates; as published in JINST

Published
2018
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9. Muon detector for the COSINE-100 experiment

Author

Collaboration, COSINE-100, Prihtiadi, H., Adhikari, G., Adhikari, P., de Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W., Kang, W. G., Kauer, M., Kim, B. H., Kim, H., Kim, H. J., Kim, K. W., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Kudryavtsev, V. A., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Leonard, D. S., Lim, K. E., Lynch, W. A., Maruyama, R. H., Mouton, F., Olsen, S. L., Park, H. K., Park, H. S., Park, J. S., Park, K. S., Pettus, W., Pierpoint, Z. P., Ra, S., Rogers, F. R., Rott, C., Scarff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., and Yong, S. H.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

The COSINE-100 dark matter search experiment has started taking physics data with the goal of performing an independent measurement of the annual modulation signal observed by DAMA/LIBRA. A muon detector was constructed by using plastic scintillator panels in the outermost layer of the shield surrounding the COSINE-100 detector. It is used to detect cosmic ray muons in order to understand the impact of the muon annual modulation on dark matter analysis. Assembly and initial performance test of each module have been performed at a ground laboratory. The installation of the detector in Yangyang Underground Laboratory (Y2L) was completed in the summer of 2016. Using three months of data, the muon underground flux was measured to be 328 $\pm$ 1(stat.)$\pm$ 10(syst.) muons/m$^2$/day. In this report, the assembly of the muon detector and the results from the analysis are presented., Comment: 11 pages, 19 figures

Published
2017
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10. Initial Performance of the COSINE-100 Experiment

Author

Adhikari, G., Adhikari, P., de Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W., Kang, W. G., Kauer, M., Kim, B. H., Kim, H., Kim, H. J., Kim, K. W., Kim, M. C., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Kudryavtsev, V. A., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Leonard, D. S., Lim, K. E., Lynch, W. A., Maruyama, R. H., Mouton, F., Olsen, S. L., Park, H. K., Park, H. S., Park, J. S., Park, K. S., Pettus, W., Pierpoint, Z. P., Prihtiadi, H., Ra, S., Rogers, F. R., Rott, C., Scarff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., and Yong, S. H.

Subjects
Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract

COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly of COSINE-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the DAMA/LIBRA experiment that reported an annual modulation signal. Stable operation has been achieved and will continue for at least two years. Here, we describe the design of COSINE-100, including the shielding arrangement, the configuration of the NaI(Tl) crystal detection elements, the veto systems, and the associated operational systems, and we show the current performance of the experiment., Comment: 19 pages, 25 figures, EPJC accepted

Published
2017
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11. Spectral Measurement of the Electron Antineutrino Oscillation Amplitude and Frequency using 500 Live Days of RENO Data

Author

Seo, S. H., Choi, W. Q., Seo, H., Choi, J. H., Choi, Y., Jang, H. I., Jang, J. S., Joo, K. K., Kim, B. R., Kim, H. S., Kim, J. Y., Kim, S. B., Kim, S. Y., Kim, W., Kwon, E., Lee, D. H., Lee, Y. C., Lim, I. T., Pac, M. Y., Park, I. G., Park, J. S., Park, R. G., Seon, Y. G., Shin, C. D., Yang, J. H., Yang, J. Y., Yeo, I. S., and Yu, I.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The Reactor Experiment for Neutrino Oscillation (RENO) has been taking electron antineutrino ($\overline{\nu}_{e}$) data from the reactors in Yonggwang, Korea, using two identical detectors since August 2011. Using roughly 500 live days of data through January 2013 we observe 290,775 (31,514) reactor $\overline{\nu}_{e}$ candidate events with 2.8 (4.9)% background in the near (far) detector. The observed visible positron spectra from the reactor $\overline{\nu}_{e}$ events in both detectors show discrepancy around 5 MeV with regard to the prediction from the current reactor $\overline{\nu}_{e}$ model. Based on a far-to-near ratio measurement using the spectral and rate information we have obtained $\sin^2 2 \theta_{13} = 0.082 \pm 0.009({\rm stat.}) \pm 0.006({\rm syst.})$ and $|\Delta m_{ee}^2| =[2.62_{-0.23}^{+0.21}({\rm stat.})_{-0.13}^{+0.12}({\rm syst.})]\times 10^{-3}$eV$^2$., Comment: 24 pages, 30 figures. Submitted to PRD. Total detection efficiency change from 76.44% to 76.47%. Some modifications of text to improve readability and clarification of the paper

Published
2016
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12. In-Situ Measurement of Relative Attenuation Length of Gadolinium-Loaded Liquid Scintillator Using Source Data at RENO Experiment

Author

Kim, H. S., Kim, S. Y., Choi, J. H., Choi, W. Q., Choi, Y., Jang, H. I., Jang, J. S., Joo, K. K., Kim, B. R., Kim, J. Y., Kim, S. B., Kim, W., Kwon, E., Lee, D. H., Lim, I. T., Pac, M. Y., Park, I. G., Park, J. S., Park, R. G., Seo, H., Seo, S. H., Seon, Y. G., Shin, C. D., Yeo, I. S., and Yu, I.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We present in situ measurements of the relative attenuation length of the gadolinium loaded liquid scintillator in the RENO (Reactor Experiment Neutrino Oscillation) detectors using radioactive source calibration data. We observed a steady decrease in the attenuation length of the Gd-LS in the RENO detectors by 50% in about four years since the commissioning of the detectors., Comment: 11 pages, 5 figures

Published
2016
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13. Slow Control Systems of the Reactor Experiment for Neutrino Oscillation

Author

Choi, J. H., Jang, H. I., Choi, W. Q., Choi, Y., Jang, J. S., Jeon, E. J., Joo, K. K., Kim, B. R., Kim, H. S., Kim, J. Y., Kim, S. B., Kim, S. Y., Kim, W., Kim, Y. D., Ko, Y. J., Lee, J. K., Lim, I. T., Pac, M. Y., Park, I. G., Park, J. S., Park, R. G., Seo, H. K., Shin, C. D., Siyeon, K., Yeo, I. S., and Yu, I.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The RENO experiment has been in operation since August 2011 to measure reactor antineutrino disappearance using identical near and far detectors. For accurate measurements of neutrino mixing parameters and efficient data taking, it is crucial to monitor and control the detector in real time. Environmental conditions also need to be monitored for stable operation of detectors as well as for safety reasons. In this article, we report the design, hardware, operation, and performance of the slow control system.

Published
2013

14. Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment

Author

Arenz, M., Baek, W.-J., Bauer, S., Beck, M., Beglarian, A., Behrens, J., Berendes, R., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buglak, W., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Furse, D., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C.-O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Wandkowsky, N., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Published
2018
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15. Initial performance of the COSINE-100 experiment

Author

Adhikari, G., Adhikari, P., de Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W. G., Kang, W., Kauer, M., Kim, B. H., Kim, H., Kim, H. J., Kim, K. W., Kim, M. C., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Kudryavtsev, V. A., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Leonard, D. S., Lim, K. E., Lynch, W. A., Maruyama, R. H., Mouton, F., Olsen, S. L., Park, H. K., Park, H. S., Park, J. S., Park, K. S., Pettus, W., Pierpoint, Z. P., Prihtiadi, H., Ra, S., Rogers, F. R., Rott, C., Scarff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., and Yong, S. H.

Published
2018
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16. High-resolution spectroscopy of gaseous 83mKr conversion electrons with the KATRIN experiment

Author

Altenmüller, K, Arenz, M, Baek, W-J, Beck, M, Beglarian, A, Behrens, J, Bergmann, T, Berlev, A, Besserer, U, Blaum, K, Block, F, Bobien, S, Bode, T, Bornschein, B, Bornschein, L, Brunst, T, Buzinsky, N, Chilingaryan, S, Choi, W Q, Deffert, M, Doe, P J, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Eversheim, D, Fedkevych, M, Formaggio, J A, Fränkle, F M, Franklin, G B, Friedel, F, Fulst, A, Gil, W, Glück, F, Ureña, A Gonzalez, Grohmann, S, Grössle, R, Gumbsheimer, R, Hackenjos, M, Hannen, V, Harms, F, Haußmann, N, Heizmann, F, Helbing, K, Hickford, S, Hilk, D, Hillesheimer, D, Hinz, D, Howe, M A, Huber, A, Jansen, A, Kellerer, J, Kernert, N, Kippenbrock, L, Klein, M, Kopmann, A, Korzeczek, M, Kovalík, A, Krasch, B, Kraus, M, Lasserre, T, Lebeda, O, Letnev, J, Lokhov, A, Machatschek, M, Marsteller, A, Martin, E L, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, D S, Plischke, P, Pollithy, A, Poon, A W P, Priester, F, C-O Ranitzsch, P, Rest, O, Robertson, R G H, Roccati, F, Rodenbeck, C, Röllig, M, Röttele, C, Ryšavý, M, Sack, R, Saenz, A., Schimpf, L, Schlösser, K, Schlösser, M, Schönung, K, Schrank, M, Seitz-Moskaliuk, H, Altenmüller, K, Arenz, M, Baek, W-J, Beck, M, Beglarian, A, Behrens, J, Bergmann, T, Berlev, A, Besserer, U, Blaum, K, Block, F, Bobien, S, Bode, T, Bornschein, B, Bornschein, L, Brunst, T, Buzinsky, N, Chilingaryan, S, Choi, W Q, Deffert, M, Doe, P J, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Eversheim, D, Fedkevych, M, Formaggio, J A, Fränkle, F M, Franklin, G B, Friedel, F, Fulst, A, Gil, W, Glück, F, Ureña, A Gonzalez, Grohmann, S, Grössle, R, Gumbsheimer, R, Hackenjos, M, Hannen, V, Harms, F, Haußmann, N, Heizmann, F, Helbing, K, Hickford, S, Hilk, D, Hillesheimer, D, Hinz, D, Howe, M A, Huber, A, Jansen, A, Kellerer, J, Kernert, N, Kippenbrock, L, Klein, M, Kopmann, A, Korzeczek, M, Kovalík, A, Krasch, B, Kraus, M, Lasserre, T, Lebeda, O, Letnev, J, Lokhov, A, Machatschek, M, Marsteller, A, Martin, E L, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, D S, Plischke, P, Pollithy, A, Poon, A W P, Priester, F, C-O Ranitzsch, P, Rest, O, Robertson, R G H, Roccati, F, Rodenbeck, C, Röllig, M, Röttele, C, Ryšavý, M, Sack, R, Saenz, A., Schimpf, L, Schlösser, K, Schlösser, M, Schönung, K, Schrank, M, and Seitz-Moskaliuk, H

Abstract

In this work, we present the first spectroscopic measurements of conversion electrons originating from the decay of metastable gaseous 83mKr with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The obtained results represent one of the major commissioning milestones for the subsequent direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the KATRIN beamline. Precise measurement of the narrow K-32, L3-32, and N2,3-32 conversion electron lines allowed to verify the eV-scale energy resolution of the KATRIN main spectrometer necessary for competitive measurement of the absolute neutrino mass scale., Bundesministerium für Bildung und Forschunghttps://doi.org/10.13039/501100002347, Helmholtz Alliance for Astroparticle Physics, Helmholtz Young Investigator Group, Ministerstvo Školství, Mládeže a Tělovýchovyhttps://doi.org/10.13039/501100001823, Helmholtz Associationhttps://doi.org/10.13039/501100009318, United States Department of Energy, Peer Reviewed

Published
2020

17. High-resolution spectroscopy of gaseous 83mKr conversion electrons with the KATRIN experiment

Author

Altenmüller, K, primary, Arenz, M, additional, Baek, W-J, additional, Beck, M, additional, Beglarian, A, additional, Behrens, J, additional, Bergmann, T, additional, Berlev, A, additional, Besserer, U, additional, Blaum, K, additional, Block, F, additional, Bobien, S, additional, Bode, T, additional, Bornschein, B, additional, Bornschein, L, additional, Brunst, T, additional, Buzinsky, N, additional, Chilingaryan, S, additional, Choi, W Q, additional, Deffert, M, additional, Doe, P J, additional, Dragoun, O, additional, Drexlin, G, additional, Dyba, S, additional, Edzards, F, additional, Eitel, K, additional, Ellinger, E, additional, Engel, R, additional, Enomoto, S, additional, Eversheim, D, additional, Fedkevych, M, additional, Formaggio, J A, additional, Fränkle, F M, additional, Franklin, G B, additional, Friedel, F, additional, Fulst, A, additional, Gil, W, additional, Glück, F, additional, Ureña, A Gonzalez, additional, Grohmann, S, additional, Grössle, R, additional, Gumbsheimer, R, additional, Hackenjos, M, additional, Hannen, V, additional, Harms, F, additional, Haußmann, N, additional, Heizmann, F, additional, Helbing, K, additional, Hickford, S, additional, Hilk, D, additional, Hillesheimer, D, additional, Hinz, D, additional, Howe, M A, additional, Huber, A, additional, Jansen, A, additional, Kellerer, J, additional, Kernert, N, additional, Kippenbrock, L, additional, Klein, M, additional, Kopmann, A, additional, Korzeczek, M, additional, Kovalík, A, additional, Krasch, B, additional, Kraus, M, additional, Lasserre, T, additional, Lebeda, O, additional, Letnev, J, additional, Lokhov, A, additional, Machatschek, M, additional, Marsteller, A, additional, Martin, E L, additional, Mertens, S, additional, Mirz, S, additional, Monreal, B, additional, Neumann, H, additional, Niemes, S, additional, Off, A, additional, Osipowicz, A, additional, Otten, E, additional, Parno, D S, additional, Plischke, P, additional, Pollithy, A, additional, Poon, A W P, additional, Priester, F, additional, C-O Ranitzsch, P, additional, Rest, O, additional, Robertson, R G H, additional, Roccati, F, additional, Rodenbeck, C, additional, Röllig, M, additional, Röttele, C, additional, Ryšavý, M, additional, Sack, R, additional, Saenz, A, additional, Schimpf, L, additional, Schlösser, K, additional, Schlösser, M, additional, Schönung, K, additional, Schrank, M, additional, Seitz-Moskaliuk, H, additional, Sentkerestiová, J, additional, Sibille, V, additional, Slezák, M, additional, Steidl, M, additional, Steinbrink, N, additional, Sturm, M, additional, Suchopar, M, additional, Suesser, M, additional, Telle, H H, additional, Thorne, L A, additional, Thümmler, T, additional, Titov, N, additional, Tkachev, I, additional, Trost, N, additional, Valerius, K, additional, Vénos, D, additional, Vianden, R, additional, Hernández, A P Vizcaya, additional, Weber, M, additional, Weinheimer, C, additional, Welte, S, additional, Wendel, J, additional, Wilkerson, J F, additional, Wolf, J, additional, Wüstling, S, additional, Zadoroghny, S, additional, and Zeller, G, additional

Published
2020
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18. The KATRIN Superconducting Magnets: Overview and First Performance Results

Author

KATRIN Collaboration, Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Frankle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Urena, A. G., Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalik, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C.-O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. V., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., Zadoroghny, S., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and KATRIN

Subjects
safety, Speichertechnik - Abteilung Blaum, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, magnet: solenoid, quenching, FOS: Physical sciences, Solenoid, Superconducting magnet, KATRIN, 01 natural sciences, 7. Clean energy, Nuclear physics, beam: alignment, 0103 physical sciences, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation, Mathematical Physics, activity report, Physics, Beam diameter, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), magnet: superconductivity, Magnetic flux, ddc, Magnetic field, Magnet, flux: magnetic, magnetic field: stability, Physics::Accelerator Physics, Beam (structure), performance
Abstract

International audience; The KATRIN experiment aims for the determination of the effective electron anti-neutrino mass from the tritium beta-decay with an unprecedented sub-eV sensitivity. The strong magnetic fields, designed for up to 6 T, adiabatically guide β-electrons from the source to the detector within a magnetic flux of 191 Tcm2. A chain of ten single solenoid magnets and two larger superconducting magnet systems have been designed, constructed, and installed in the 70-m-long KATRIN beam line. The beam diameter for the magnetic flux varies from 0.064 m to 9 m, depending on the magnetic flux density along the beam line. Two transport and tritium pumping sections are assembled with chicane beam tubes to avoid direct "line-of-sight" molecular beaming effect of gaseous tritium molecules into the next beam sections. The sophisticated beam alignment has been successfully cross-checked by electron sources. In addition, magnet safety systems were developed to protect the complex magnet systems against coil quenches or other system failures. The main functionality of the magnet safety systems has been successfully tested with the two large magnet systems. The complete chain of the magnets was operated for several weeks at 70% of the design fields for the first test measurements with radioactive krypton gas. The stability of the magnetic fields of the source magnets has been shown to be better than 0.01% per month at 70% of the design fields. This paper gives an overview of the KATRIN superconducting magnets and reports on the first performance results of the magnets.

Published
2018

19. First transmission of electrons and ions through the KATRIN beamline

Author

KATRIN Collaboration, Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Fischer, S., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Naumann, U., Neumann, H., Niemes, S., Off, A., Ortjohann, H.-W., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C.-O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Ion sources (positive ions, architecture, Spectrometers, Physics, Beam-line instrumentation (beam position and profile monitors, Detector control systems (detector and experiment monitoring and slow-control systems, negative ions, electron beam (EBIS)), algorithms, beamintensity monitors, bunch length monitors), hardware, ddc:530, electron cyclotron resonance (ECR), databases)
Abstract

The Karlsruhe Tritium Neutrino (KATRIN) experiment is a large-scale effort to probe the absolute neutrino mass scale with a sensitivity of 0.2 eV (90% confidence level), via a precise measurement of the endpoint spectrum of tritium ß-decay. This work documents several KATRIN commissioning milestones: the complete assembly of the experimental beamline, the successful transmission of electrons from three sources through the beamline to the primary detector, and tests of ion transport and retention. In the First Light commissioning campaign of autumn 2016, photoelectrons were generated at the rear wall and ions were created by a dedicated ion source attached to the rear section; in July 2017, gaseous 83mKr was injected into the KATRIN source section, and a condensed 83mKr source was deployed in the transport section. In this paper we describe the technical details of the apparatus and the configuration for each measurement, and give first results on source and system performance. We have successfully achieved transmission from all four sources, established system stability, and characterized many aspects of the apparatus.

Published
2018

20. Gamma-induced background in the KATRIN main spectrometer

Author

Altenmüller, K., primary, Arenz, M., additional, Baek, W.-J., additional, Beck, M., additional, Beglarian, A., additional, Behrens, J., additional, Berlev, A., additional, Besserer, U., additional, Blaum, K., additional, Block, F., additional, Bobien, S., additional, Bode, T., additional, Bornschein, B., additional, Bornschein, L., additional, Bouquet, H., additional, Brunst, T., additional, Buzinsky, N., additional, Chilingaryan, S., additional, Choi, W. Q., additional, Deffert, M., additional, Doe, P. J., additional, Dragoun, O., additional, Drexlin, G., additional, Dyba, S., additional, Eitel, K., additional, Ellinger, E., additional, Engel, R., additional, Enomoto, S., additional, Erhard, M., additional, Eversheim, D., additional, Fedkevych, M., additional, Formaggio, J. A., additional, Fränkle, F. M., additional, Franklin, G. B., additional, Friedel, F., additional, Fulst, A., additional, Gil, W., additional, Glück, F., additional, Ureña, A. Gonzalez, additional, Grössle, R., additional, Gumbsheimer, R., additional, Hackenjos, M., additional, Hannen, V., additional, Harms, F., additional, Haußmann, N., additional, Heizmann, F., additional, Helbing, K., additional, Herz, W., additional, Hickford, S., additional, Hilk, D., additional, Hillesheimer, D., additional, Howe, M. A., additional, Huber, A., additional, Jansen, A., additional, Karl, C., additional, Kellerer, J., additional, Kernert, N., additional, Kippenbrock, L., additional, Klein, M., additional, Kopmann, A., additional, Korzeczek, M., additional, Kovalík, A., additional, Krasch, B., additional, Kraus, A., additional, Kraus, M., additional, Lasserre, T., additional, Lebeda, O., additional, Lehnert, B., additional, Letnev, J., additional, Lokhov, A., additional, Machatschek, M., additional, Marsteller, A., additional, Martin, E. L., additional, Mertens, S., additional, Mirz, S., additional, Monreal, B., additional, Neumann, H., additional, Niemes, S., additional, Osipowicz, A., additional, Otten, E., additional, Parno, D. S., additional, Pollithy, A., additional, Poon, A. W. P., additional, Priester, F., additional, Ranitzsch, P. C.-O., additional, Rest, O., additional, Robertson, R. G. H., additional, Rodenbeck, C., additional, Röllig, M., additional, Röttele, C., additional, Ryšavý, M., additional, Sack, R., additional, Saenz, A., additional, Schimpf, L., additional, Schlösser, K., additional, Schlösser, M., additional, Schlüter, L., additional, Schrank, M., additional, Seitz-Moskaliuk, H., additional, Sibille, V., additional, Slezák, M., additional, Steidl, M., additional, Steinbrink, N., additional, Sturm, M., additional, Suchopar, M., additional, Tcherniakhovski, D., additional, Telle, H. H., additional, Thorne, L. A., additional, Thümmler, T., additional, Titov, N., additional, Tkachev, I., additional, Trost, N., additional, Valerius, K., additional, Vénos, D., additional, Vianden, R., additional, Hernández, A. P. Vizcaya, additional, Weber, M., additional, Weinheimer, C., additional, Weiss, C., additional, Welte, S., additional, Wendel, J., additional, Wilkerson, J. F., additional, Wolf, J., additional, Wüstling, S., additional, Zadoroghny, S., additional, and Zeller, G., additional

Published
2019
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21. Calibration of high voltages at the ppm level by the difference of [superscript 83m]Kr conversion electron lines at the KATRIN experiment

Author

Massachusetts Institute of Technology. Department of Physics, Buzinsky, Nicholas Gregory, Formaggio, Joseph A, Sibille, Valerian, Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Chilingaryan, S., Choi, W. Q, Deffert, M., Doe, P. J, Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Fischer, S., Fränkle, F. M, Franklin, G. B, Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. G, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A, Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L, Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S, Pollithy, A., Poon, A. W P, Priester, F., Ranitzsch, P. C, Rest, O., Robertson, R. G H, Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H, Thorne, L. A, Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P V, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F, Wolf, J., Wüstling, S., Zadoroghny, S., Massachusetts Institute of Technology. Department of Physics, Buzinsky, Nicholas Gregory, Formaggio, Joseph A, Sibille, Valerian, Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Chilingaryan, S., Choi, W. Q, Deffert, M., Doe, P. J, Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Fischer, S., Fränkle, F. M, Franklin, G. B, Friedel, F., Fulst, A., Gil, W., Glück, F., Ureña, A. G, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Hillesheimer, D., Howe, M. A, Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L, Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S, Pollithy, A., Poon, A. W P, Priester, F., Ranitzsch, P. C, Rest, O., Robertson, R. G H, Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Suesser, M., Telle, H. H, Thorne, L. A, Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P V, Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F, Wolf, J., Wüstling, S., and Zadoroghny, S.

Abstract

The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at − 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage dividers were developed and built in cooperation with the German national metrology institute Physikalisch-Technische Bundesanstalt (PTB). Until now, regular absolute calibration of the voltage dividers required bringing the equipment to the specialised metrology laboratory. Here we present a new method based on measuring the energy difference of two [superscript 83m]Kr conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN’s commissioning measurements in July 2017. The measured scale factor M = 1972.449(10) of the high-voltage divider K35 is in agreement with the last PTB calibration 4 years ago. This result demonstrates the utility of the calibration method, as well as the long-term stability of the voltage divider., United States. Department of Energy (Grant DEFG02- 97ER41020), United States. Department of Energy (Grant DE-FG02-94ER40818), United States. Department of Energy (Grant DE-SC0004036), United States. Department of Energy (Grant DEFG02-97ER 41033), United States. Department of Energy (Grant DE-FG02-97ER41041), United States. Department of Energy (Grant DE-AC02-05CH11231), United States. Department of Energy (Grant DE-SC00 11091)

Published
2018

22. Initial performance of the COSINE-100 experiment

Author

Massachusetts Institute of Technology. Department of Physics, Rogers, Field Rose, Adhikari, G., Adhikari, P., de Souza, E. B, Carlin, N., Choi, S., Choi, W. Q, Djamal, M., Ezeribe, A. C, Ha, C., Hahn, I. S, Hubbard, A. J F, Jeon, E. J, Jo, J. H, Joo, H. W, Kang, W. G, Kang, W., Kauer, M., Kim, B. H, Kim, H., Kim, H. J, Kim, K. W, Kim, M. C, Kim, N. Y, Kim, S. K, Kim, Y. D, Kim, Y. H, Kudryavtsev, V. A, Lee, H. S, Lee, J., Lee, J. Y, Lee, M. H, Leonard, D. S, Lim, K. E, Lynch, W. A, Maruyama, R. H, Mouton, F., Olsen, S. L, Park, H. K, Park, H. S, Park, J. S, Park, K. S, Pettus, W., Pierpoint, Z. P, Prihtiadi, H., Ra, S., Rott, C., Scarff, A., Spooner, N. J C, Thompson, W. G, Yang, L., Yong, S. H, Massachusetts Institute of Technology. Department of Physics, Rogers, Field Rose, Adhikari, G., Adhikari, P., de Souza, E. B, Carlin, N., Choi, S., Choi, W. Q, Djamal, M., Ezeribe, A. C, Ha, C., Hahn, I. S, Hubbard, A. J F, Jeon, E. J, Jo, J. H, Joo, H. W, Kang, W. G, Kang, W., Kauer, M., Kim, B. H, Kim, H., Kim, H. J, Kim, K. W, Kim, M. C, Kim, N. Y, Kim, S. K, Kim, Y. D, Kim, Y. H, Kudryavtsev, V. A, Lee, H. S, Lee, J., Lee, J. Y, Lee, M. H, Leonard, D. S, Lim, K. E, Lynch, W. A, Maruyama, R. H, Mouton, F., Olsen, S. L, Park, H. K, Park, H. S, Park, J. S, Park, K. S, Pettus, W., Pierpoint, Z. P, Prihtiadi, H., Ra, S., Rott, C., Scarff, A., Spooner, N. J C, Thompson, W. G, Yang, L., and Yong, S. H

Abstract

COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly of COSINE-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the DAMA/LIBRA experiment that reported an annual modulation signal. Stable operation has been achieved and will continue for at least 2 years. Here, we describe the design of COSINE-100, including the shielding arrangement, the configuration of the NaI(Tl) crystal detection elements, the veto systems, and the associated operational systems, and we show the current performance of the experiment., National Science Foundation (U.S.) (Grant PHY-1151795), National Science Foundation (U.S.) (Grant PHY-1457995), National Science Foundation (U.S.) (Grant DGE-1122492), National Science Foundation (U.S.) (Grant DGE- 1256259), United States. Department of Energy (Grant DE-FC52-08NA28752)

Published
2018

23. High-resolution spectroscopy of gaseous 83mKr conversion electrons with the KATRIN experiment.

Author

Altenmüller, K, Arenz, M, Baek, W-J, Beck, M, Beglarian, A, Behrens, J, Bergmann, T, Berlev, A, Besserer, U, Blaum, K, Block, F, Bobien, S, Bode, T, Bornschein, B, Bornschein, L, Brunst, T, Buzinsky, N, Chilingaryan, S, Choi, W Q, and Deffert, M

Subjects
NEUTRINO mass, ELECTRONS, SPECTRUM analysis, MASS measurement, TRITIUM, NEUTRINOS, SOLAR neutrinos
Abstract

In this work, we present the first spectroscopic measurements of conversion electrons originating from the decay of metastable gaseous 83mKr with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The obtained results represent one of the major commissioning milestones for the subsequent direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the KATRIN beamline. Precise measurement of the narrow K-32, L3-32, and N2,3-32 conversion electron lines allowed to verify the eV-scale energy resolution of the KATRIN main spectrometer necessary for competitive measurement of the absolute neutrino mass scale. [ABSTRACT FROM AUTHOR]

Published
2020
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24. Background model for the NaI(Tl) crystals in COSINE-100

Author

Adhikari, P., primary, Adhikari, G., additional, Souza, E. Barbosa de, additional, Carlin, N., additional, Choi, S., additional, Choi, W. Q., additional, Djamal, M., additional, Ezeribe, A. C., additional, Ha, C., additional, Hahn, I. S., additional, Hubbard, A. J. F., additional, Jeon, E. J., additional, Jo, J. H., additional, Joo, H. W., additional, Kang, W. G., additional, Kauer, M., additional, Kang, W. S., additional, Kim, B. H., additional, Kim, H., additional, Kim, H. J., additional, Kim, K. W., additional, Kim, M. C., additional, Kim, N. Y., additional, Kim, S. K., additional, Kim, Y. D., additional, Kim, Y. H., additional, Kudryavtsev, V. A., additional, Lee, H. S., additional, Lee, J., additional, Lee, J. Y., additional, Lee, M. H., additional, Leonard, D. S., additional, Lynch, W. A., additional, Maruyama, R. H., additional, Mouton, F., additional, Olsen, S. L., additional, Park, H. K., additional, Park, H. S., additional, Park, J. S., additional, Park, K. S., additional, Pettus, W., additional, Prihtiadi, H., additional, Ra, S., additional, Rott, C., additional, Scarff, A., additional, Spooner, N. J. C., additional, Thompson, W. G., additional, Yang, L., additional, and Yong, S. H., additional

Published
2018
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25. Calibration of high voltages at the ppm level by the difference of $$^{83{\mathrm{m}}}$$Kr conversion electron lines at the KATRIN experiment

Author

Arenz, M., primary, Baek, W.-J., additional, Beck, M., additional, Beglarian, A., additional, Behrens, J., additional, Bergmann, T., additional, Berlev, A., additional, Besserer, U., additional, Blaum, K., additional, Bode, T., additional, Bornschein, B., additional, Bornschein, L., additional, Brunst, T., additional, Buzinsky, N., additional, Chilingaryan, S., additional, Choi, W. Q., additional, Deffert, M., additional, Doe, P. J., additional, Dragoun, O., additional, Drexlin, G., additional, Dyba, S., additional, Edzards, F., additional, Eitel, K., additional, Ellinger, E., additional, Engel, R., additional, Enomoto, S., additional, Erhard, M., additional, Eversheim, D., additional, Fedkevych, M., additional, Fischer, S., additional, Formaggio, J. A., additional, Fränkle, F. M., additional, Franklin, G. B., additional, Friedel, F., additional, Fulst, A., additional, Gil, W., additional, Glück, F., additional, Ureña, A. Gonzalez, additional, Grohmann, S., additional, Grössle, R., additional, Gumbsheimer, R., additional, Hackenjos, M., additional, Hannen, V., additional, Harms, F., additional, Haußmann, N., additional, Heizmann, F., additional, Helbing, K., additional, Herz, W., additional, Hickford, S., additional, Hilk, D., additional, Hillesheimer, D., additional, Howe, M. A., additional, Huber, A., additional, Jansen, A., additional, Kellerer, J., additional, Kernert, N., additional, Kippenbrock, L., additional, Kleesiek, M., additional, Klein, M., additional, Kopmann, A., additional, Korzeczek, M., additional, Kovalík, A., additional, Krasch, B., additional, Kraus, M., additional, Kuckert, L., additional, Lasserre, T., additional, Lebeda, O., additional, Letnev, J., additional, Lokhov, A., additional, Machatschek, M., additional, Marsteller, A., additional, Martin, E. L., additional, Mertens, S., additional, Mirz, S., additional, Monreal, B., additional, Neumann, H., additional, Niemes, S., additional, Off, A., additional, Osipowicz, A., additional, Otten, E., additional, Parno, D. S., additional, Pollithy, A., additional, Poon, A. W. P., additional, Priester, F., additional, Ranitzsch, P. C.-O., additional, Rest, O., additional, Robertson, R. G. H., additional, Roccati, F., additional, Rodenbeck, C., additional, Röllig, M., additional, Röttele, C., additional, Ryšavý, M., additional, Sack, R., additional, Saenz, A., additional, Schimpf, L., additional, Schlösser, K., additional, Schlösser, M., additional, Schönung, K., additional, Schrank, M., additional, Seitz-Moskaliuk, H., additional, Sentkerestiová, J., additional, Sibille, V., additional, Slezák, M., additional, Steidl, M., additional, Steinbrink, N., additional, Sturm, M., additional, Suchopar, M., additional, Suesser, M., additional, Telle, H. H., additional, Thorne, L. A., additional, Thümmler, T., additional, Titov, N., additional, Tkachev, I., additional, Trost, N., additional, Valerius, K., additional, Vénos, D., additional, Vianden, R., additional, Hernández, A. P. Vizcaya, additional, Weber, M., additional, Weinheimer, C., additional, Weiss, C., additional, Welte, S., additional, Wendel, J., additional, Wilkerson, J. F., additional, Wolf, J., additional, Wüstling, S., additional, and Zadoroghny, S., additional

Published
2018
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26. High-resolution spectroscopy of gaseous $^{83m}$Kr conversion electrons with the KATRIN experiment

Author

Altenmüller, K, Arenz, M, Baek, W-J, Beck, M, Beglarian, A, Behrens, J, Bergmann, T, Berlev, A, Besserer, U, Blaum, K, Block, F, Bobien, S, Bode, T, Bornschein, B, Bornschein, L, Brunst, T, Buzinsky, N, Chilingaryan, S, Choi, W Q, Deffert, M, Doe, P J, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Eversheim, D, Fedkevych, M, Formaggio, J A, Fränkle, F M, Franklin, G B, Friedel, F, Fulst, A, Gil, W, Glück, F, Ureña, A Gonzalez, Grohmann, S, Grössle, R, Gumbsheimer, R, Hackenjos, M, Hannen, V, Harms, F, Haußmann, N, Heizmann, F, Helbing, K, Hickford, S, Hilk, D, Hillesheimer, D, Hinz, D, Howe, M A, Huber, A, Jansen, A, Kellerer, J, Kernert, N, Kippenbrock, L, Klein, M, Kopmann, A, Korzeczek, M, Kovalík, A, Krasch, B, Kraus, M, Lasserre, T, Lebeda, O, Letnev, J, Lokhov, A, Machatschek, M, Marsteller, A, Martin, E L, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, D S, Plischke, P, Pollithy, A, Poon, A W P, Priester, F, C-O Ranitzsch, P, Rest, O, Robertson, R G H, Roccati, F, Rodenbeck, C, Röllig, M, Röttele, C, Ryšavý, M, Sack, R, Saenz, A, Schimpf, L, Schlösser, K, Schlösser, M, Schönung, K, Schrank, M, Seitz-Moskaliuk, H, Sentkerestiová, J, Sibille, V, Slezák, M, Steidl, M, Steinbrink, N, Sturm, M, Suchopar, M, Suesser, M, Telle, H H, Thorne, L A, Thümmler, T, Titov, N, Tkachev, I, Trost, N, Valerius, K, Vénos, D, Vianden, R, Hernández, A P Vizcaya, Weber, M, Weinheimer, C, Welte, S, Wendel, J, Wilkerson, J F, Wolf, J, Wüstling, S, Zadoroghny, S, and Zeller, G

Subjects
electrostatic spectrometer, conversion electrons, calibration, 7. Clean energy, neutrino mass, 3. Good health
Abstract

In this work, we present the first spectroscopic measurements of conversion electrons originating fromthe decay ofmetastable gaseous $^{83m}$Kr with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The obtained results represent one of the major commissioning milestones for the subsequent direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the KATRINbeamline. Precisemeasurement of the narrowK- 32, L$_{3}$-32, and N$_{2,3}$-32 conversion electron lines allowed to verify the eV-scale energy resolution of the KATRIN main spectrometer necessary for competitive measurement of the absolute neutrino mass scale.

27. The KATRIN superconducting magnets: Overview and first performance results

Author

Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Frankle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Gil, W., Glück, F., Urena, A. G., Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalik, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C.-O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. V., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
7. Clean energy

28. Initial performance of the COSINE-100 experiment

Author

Adhikari, G., Adhikari, P., De Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W. G., Kang, W., Kauer, M., Kim, B. H., Kim, H., Kim, H. J., Kim, K. W., Kim, M. C., Kim, N. Y., Kim, S. K., Kim, Y. D., Kim, Y. H., Kudryavtsev, V. A., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Leonard, D. S., Lim, K. E., Lynch, W. A., Maruyama, R. H., Mouton, F., Olsen, S. L., Park, H. K., Park, H. S., Park, J. S., Park, K. S., Pettus, W., Pierpoint, Z. P., Prihtiadi, H., Ra, S., Rogers, F. R., Rott, C., Scarff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., and Yong, S. H.

Subjects
7. Clean energy
Abstract

COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly of COSINE-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the DAMA/LIBRA experiment that reported an annual modulation signal. Stable operation has been achieved and will continue for at least 2 years. Here, we describe the design of COSINE-100, including the shielding arrangement, the configuration of the NaI(Tl) crystal detection elements, the veto systems, and the associated operational systems, and we show the current performance of the experiment.

29. Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment

Author

Arenz, M., Baek, W.-J., Bauer, S., Beck, M., Beglarian, A., Behrens, J., Berendes, R., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buglak, W., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., Drexlin, G., Dyba, S., Edzards, F., Eitel, K., Ellinger, E., Engel, R., Enomoto, S., Erhard, M., Eversheim, D., Fedkevych, M., Formaggio, J. A., Fränkle, F. M., Franklin, G. B., Friedel, F., Fulst, A., Furse, D., Gil, W., Glück, F., Ureña, A. Gonzalez, Grohmann, S., Grössle, R., Gumbsheimer, R., Hackenjos, M., Hannen, V., Harms, F., Haußmann, N., Heizmann, F., Helbing, K., Herz, W., Hickford, S., Hilk, D., Howe, M. A., Huber, A., Jansen, A., Kellerer, J., Kernert, N., Kippenbrock, L., Kleesiek, M., Klein, M., Kopmann, A., Korzeczek, M., Kovalík, A., Krasch, B., Kraus, M., Kuckert, L., Lasserre, T., Lebeda, O., Letnev, J., Lokhov, A., Machatschek, M., Marsteller, A., Martin, E. L., Mertens, S., Mirz, S., Monreal, B., Neumann, H., Niemes, S., Off, A., Osipowicz, A., Otten, E., Parno, D. S., Pollithy, A., Poon, A. W. P., Priester, F., Ranitzsch, P. C.-O., Rest, O., Robertson, R. G. H., Roccati, F., Rodenbeck, C., Röllig, M., Röttele, C., Ryšavý, M., Sack, R., Saenz, A., Schimpf, L., Schlösser, K., Schlösser, M., Schönung, K., Schrank, M., Seitz-Moskaliuk, H., Sentkerestiová, J., Sibille, V., Slezák, M., Steidl, M., Steinbrink, N., Sturm, M., Suchopar, M., Telle, H. H., Thorne, L. A., Thümmler, T., Titov, N., Tkachev, I., Trost, N., Valerius, K., Vénos, D., Vianden, R., Hernández, A. P. Vizcaya, Wandkowsky, N., Weber, M., Weinheimer, C., Weiss, C., Welte, S., Wendel, J., Wilkerson, J. F., Wolf, J., Wüstling, S., and Zadoroghny, S.

Subjects
Physics::Instrumentation and Detectors, 13. Climate action
Abstract

The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of 0.2 eV/c2 (%90 CL) by precision measurement of the shape of the tritium β-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. A common background source in this setup is the decay of short-lived isotopes, such as 219Rn and 220Rn, in the spectrometer volume. Active and passive countermeasures have been implemented and tested at the KATRIN main spectrometer. One of these is the magnetic pulse method, which employs the existing air coil system to reduce the magnetic guiding field in the spectrometer on a short timescale in order to remove low- and high-energy stored electrons. Here we describe the working principle of this method and present results from commissioning measurements at the main spectrometer. Simulations with the particle-tracking software Kassiopeia were carried out to gain a detailed understanding of the electron storage conditions and removal processes.

30. Calibration of high voltages at the ppm level by the difference of 83mKr conversion electron lines at the KATRIN experiment.

Author

Arenz, M., Baek, W.-J., Beck, M., Beglarian, A., Behrens, J., Bergmann, T., Berlev, A., Besserer, U., Blaum, K., Bode, T., Bornschein, B., Bornschein, L., Brunst, T., Buzinsky, N., Chilingaryan, S., Choi, W. Q., Deffert, M., Doe, P. J., Dragoun, O., and Drexlin, G.

Subjects
CALIBRATION, HIGH voltages, ELECTRON accelerators, NUCLEAR physics experiments, ENERGY conversion, NUCLEAR energy
Abstract

The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at − 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage dividers were developed and built in cooperation with the German national metrology institute Physikalisch-Technische Bundesanstalt (PTB). Until now, regular absolute calibration of the voltage dividers required bringing the equipment to the specialised metrology laboratory. Here we present a new method based on measuring the energy difference of two 83mKr conversion electron lines with the KATRIN setup, which was demonstrated during KATRIN’s commissioning measurements in July 2017. The measured scale factor M=1972.449(10) of the high-voltage divider K35 is in agreement with the last PTB calibration 4 years ago. This result demonstrates the utility of the calibration method, as well as the long-term stability of the voltage divider. [ABSTRACT FROM AUTHOR]

Published
2018
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31. Muon detector for the COSINE-100 experiment.

Author

Prihtiadi, H., Adhikari, G., Adhikari, P., de Souza, E. Barbosa, Carlin, N., Choi, S., Choi, W. Q., Djamal, M., Ezeribe, A. C., Ha, C., Hahn, I. S., Hubbard, A. J. F., Jeon, E. J., Jo, J. H., Joo, H. W., Kang, W., Kang, W. G., Kauer, M., Kim, B. H., and Kim, H.

Published
2018
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32. Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment.

Author

Choi JH, Choi WQ, Choi Y, Jang HI, Jang JS, Jeon EJ, Joo KK, Kim BR, Kim HS, Kim JY, Kim SB, Kim SY, Kim W, Kim YD, Ko Y, Lee DH, Lim IT, Pac MY, Park IG, Park JS, Park RG, Seo H, Seo SH, Seon YG, Shin CD, Siyeon K, Yang JH, Yeo IS, and Yu I

Abstract

The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor ν[over ¯]_{e} by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observed 31 541 (290 775) electron antineutrino candidate events with a background fraction of 4.9% (2.8%). The measured prompt spectra show an excess of reactor ν[over ¯]_{e} around 5 MeV relative to the prediction from a most commonly used model. A clear energy and baseline dependent disappearance of reactor ν[over ¯]_{e} is observed in the deficit of the observed number of ν[over ¯]_{e}. Based on the measured far-to-near ratio of prompt spectra, we obtain sin^{2}2θ_{13}=0.082±0.009(stat)±0.006(syst) and |Δm_{ee}^{2}|=[2.62_{-0.23}^{+0.21}(stat)_{-0.13}^{+0.12}(syst)]×10^{-3}  eV^{2}.

Published
2016
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