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Title: Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment

Abstract

The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of 0.2 eV/c 2 (%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.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Helmholtz Association (HGF)
Contributing Org.:
KATRIN collaboration
OSTI Identifier:
1506349
Grant/Contract Number:  
AC02-05CH11231; FG02-94ER40818; SC0004036; FG02-97ER41033; FG02-97ER41041
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 78; Journal Issue: 9; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Arenz, M, Baek, WJ, 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, WQ, Deffert, M, Doe, PJ, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Erhard, M, Eversheim, D, Fedkevych, M, Formaggio, JA, Fränkle, FM, Franklin, GB, Friedel, F, Fulst, A, Furse, D, Gil, W, Glück, F, Ureña, AG, 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, MA, 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, EL, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, DS, Pollithy, A, Poon, AWP, Priester, F, Ranitzsch, PCO, Rest, O, Robertson, RGH, and Roccati, F. Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment. United States: N. p., 2018. Web. doi:10.1140/epjc/s10052-018-6244-8.
Arenz, M, Baek, WJ, 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, WQ, Deffert, M, Doe, PJ, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Erhard, M, Eversheim, D, Fedkevych, M, Formaggio, JA, Fränkle, FM, Franklin, GB, Friedel, F, Fulst, A, Furse, D, Gil, W, Glück, F, Ureña, AG, 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, MA, 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, EL, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, DS, Pollithy, A, Poon, AWP, Priester, F, Ranitzsch, PCO, Rest, O, Robertson, RGH, & Roccati, F. Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment. United States. doi:10.1140/epjc/s10052-018-6244-8.
Arenz, M, Baek, WJ, 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, WQ, Deffert, M, Doe, PJ, Dragoun, O, Drexlin, G, Dyba, S, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Erhard, M, Eversheim, D, Fedkevych, M, Formaggio, JA, Fränkle, FM, Franklin, GB, Friedel, F, Fulst, A, Furse, D, Gil, W, Glück, F, Ureña, AG, 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, MA, 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, EL, Mertens, S, Mirz, S, Monreal, B, Neumann, H, Niemes, S, Off, A, Osipowicz, A, Otten, E, Parno, DS, Pollithy, A, Poon, AWP, Priester, F, Ranitzsch, PCO, Rest, O, Robertson, RGH, and Roccati, F. Wed . "Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment". United States. doi:10.1140/epjc/s10052-018-6244-8. https://www.osti.gov/servlets/purl/1506349.
@article{osti_1506349,
title = {Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment},
author = {Arenz, M and Baek, WJ and Bauer, S and Beck, M and Beglarian, A and Behrens, J and Berendes, R and Bergmann, T and Berlev, A and Besserer, U and Blaum, K and Bode, T and Bornschein, B and Bornschein, L and Brunst, T and Buglak, W and Buzinsky, N and Chilingaryan, S and Choi, WQ and Deffert, M and Doe, PJ and Dragoun, O and Drexlin, G and Dyba, S and Edzards, F and Eitel, K and Ellinger, E and Engel, R and Enomoto, S and Erhard, M and Eversheim, D and Fedkevych, M and Formaggio, JA and Fränkle, FM and Franklin, GB and Friedel, F and Fulst, A and Furse, D and Gil, W and Glück, F and Ureña, AG and Grohmann, S and Grössle, R and Gumbsheimer, R and Hackenjos, M and Hannen, V and Harms, F and Haußmann, N and Heizmann, F and Helbing, K and Herz, W and Hickford, S and Hilk, D and Howe, MA and Huber, A and Jansen, A and Kellerer, J and Kernert, N and Kippenbrock, L and Kleesiek, M and Klein, M and Kopmann, A and Korzeczek, M and Kovalík, A and Krasch, B and Kraus, M and Kuckert, L and Lasserre, T and Lebeda, O and Letnev, J and Lokhov, A and Machatschek, M and Marsteller, A and Martin, EL and Mertens, S and Mirz, S and Monreal, B and Neumann, H and Niemes, S and Off, A and Osipowicz, A and Otten, E and Parno, DS and Pollithy, A and Poon, AWP and Priester, F and Ranitzsch, PCO and Rest, O and Robertson, RGH and Roccati, F},
abstractNote = {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.},
doi = {10.1140/epjc/s10052-018-6244-8},
journal = {European Physical Journal. C, Particles and Fields},
number = 9,
volume = 78,
place = {United States},
year = {2018},
month = {9}
}

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Figures / Tables:

Fig. 1 Fig. 1: The KATRIN beamline with a total length of about 70 m: (a) rear section with calibration devices, (b) windowless gaseous tritium source, (c) differential pumping section, (d) cryogenic pumping section, (e) pre-spectrometer, (f) main spectrometer with air coil system, (g) focal-plane detector. The entire beamline transmits $β$-decay electronsmore » in a 191 T cm2 flux tube to the detector« less

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