Suppression of Penning discharges between the KATRIN spectrometers

Aker, M.; Altenmüller, K.; Beglarian, A.; Behrens, J.; Berlev, A.; Besserer, U.; Blaum, K.; Block, F.; Bobien, S.; Bornschein, B.; Bornschein, L.; Bouquet, H.; Brunst, T.; Caldwell, T. S.; Chilingaryan, S.; Choi, W.; Debowski, K.; Deffert, M.; Descher, M.; Díaz Barrero, D.; Doe, P. J.; Dragoun, O.; Drexlin, G.; Dyba, S.; Eitel, K.; Ellinger, E.; Engel, R.; Enomoto, S.; Eversheim, D.; Fedkevych, M.; Felden, A.; Formaggio, J. A.; Fränkle, F.; Franklin, G. B.; Frankrone, H.; Friedel, F.; Fulst, A.; Gauda, K.; Gil, W.; Glück, F.; Grohmann, S.; Grössle, R.; Gumbsheimer, R.; Hackenjos, M.; Hannen, V.; Hartmann, J.; Haußmann, N.; Heizmann, F.; Heizmann, J.; Helbing, K.; Hickford, S.; Hillesheimer, D.; Hinz, D.; Höhn, T.; Holzapfel, B.; Holzmann, S.; Houdy, T.; Jansen, A.; Karl, C.; Kellerer, J.; Kernert, N.; Kippenbrock, L.; Klein, M.; Köhler, C.; Köllenberger, L.; Kopmann, A.; Korzeczek, M.; Kovalík, A.; Krasch, B.; Krause, H.; Kuffner, B.; Kunka, N.; Lasserre, T.; La Cascio, L.; Lebeda, O.; Lehnert, B.; Letnev, J.; Leven, F.; Le, T. L.; Lichter, S.; Lokhov, A.; Machatschek, M.; Malcherek, E.; Marsteller, A.; Martin, E. L.; Melzer, C.; Menshikov, A.; Mertens, S.; Mirz, S.; Monreal, B.; Müller, K.; Naumann, U.; Neumann, H.; Niemes, S.; Noe, M.; Ortjohann, H. -W.; Osipowicz, A.; Otten, E.; Parno, D. S.; Pollithy, A.; Poon, A. W. P.; Poyato, J. M. L.; Priester, F.; Ranitzsch, P. C. -O.; Rest, O.; Rinderspacher, R.; Robertson, R. G. H.; Rodenbeck, C.; Rohr, P.; Röllig, M.; Röttele, C.; Ryšavý, M.; Sack, R.; Saenz, A.; Schäfer, P.; Schimpf, L.; Schlösser, K.; Schlösser, M.; Schlüter, L.; Schrank, M.; Schulz, B.; Seitz-Moskaliuk, H.; Seller, W.; Sibille, V.; Siegmann, D.; Slezák, M.; Spanier, F.; Steidl, M.; Steven, M.; Sturm, M.; Suesser, M.; Sun, M.; Tcherniakhovski, D.; Telle, H. H.; Thorne, L. A.; Thümmler, T.; Titov, N.; Tkachev, I.; Trost, N.; Valerius, K.; Vénos, D.; Vianden, R.; Vizcaya Hernández, A. P.; Weber, M.; Weinheimer, C.; Weiss, C.; Welte, S.; Wendel, J.; Wilkerson, J. F.; Wolf, J.; Wüstling, S.; Xu, W.; Yen, Y. -R.; Zadoroghny, S.; Zeller, G.

doi:10.1140/epjc/s10052-020-8278-y

Title: Suppression of Penning discharges between the KATRIN spectrometers

Journal Article · Fri Sep 04 00:00:00 EDT 2020 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-020-8278-y· OSTI ID:1818812

Aker, M.; Altenmüller, K.; Beglarian, A.; Behrens, J.; Berlev, A.; Besserer, U.; Blaum, K.; Block, F.; Bobien, S.; Bornschein, B.; Bornschein, L.; Bouquet, H.; Brunst, T.; Caldwell, T. S.; Chilingaryan, S.; Choi, W.; Debowski, K.; Deffert, M.; Descher, M.; Díaz Barrero, D. more »

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)-neutrino mass with a sensitivity of 0.2eV/c$^2$ by precisely measuring the endpoint region of the tritium $\beta $-decay spectrum. It uses a tandem of electrostatic spectrometers working as magnetic adiabatic collimation combined with an electrostatic (MAC-E) filters. In the space between the pre-spectrometer and the main spectrometer, creating a Penning trap is unavoidable when the superconducting magnet between the two spectrometers, biased at their respective nominal potentials, is energized. The electrons accumulated in this trap can lead to discharges, which create additional background electrons and endanger the spectrometer and detector section downstream. To counteract this problem, “electron catchers” were installed in the beamline inside the magnet bore between the two spectrometers. These catchers can be moved across the magnetic-flux tube and intercept on a sub-ms time scale the stored electrons along their magnetron motion paths. In this paper, we report on the design and the successful commissioning of the electron catchers and present results on their efficiency in reducing the experimental background.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of North Carolina, Chapel Hill, NC (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Ministry for Education and Research (BMBF); German Research Foundation (DFG)

Contributing Organization:: KATRIN Collaboration

Grant/Contract Number:: SC0004036; SC0011091; AC02-05CH11231; FG02- 97ER41041; FG02-94ER4081; FG02-97ER4102; FG02-97ER41033; SC0019304; CANAM-LM2011019; LTT19005; 5A17PDA; 05A17PM3; 05A17PX3; 05A17VK2; 05A17WO3; VH-NG-1055; FG02-97ER41020; FG02-94ER40818; FG02-97ER41041

OSTI ID:: 1818812

Alternate ID(s):: OSTI ID: 1670132; OSTI ID: 1834204

Journal Information:: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Vol. 80 Journal Issue: 9; ISSN 1434-6044

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Germany

Language:: English

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