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Suppression of Penning discharges between the KATRIN spectrometers

  • M. Aker
  • , K. Altenmüller
  • , A. Beglarian
  • , J. Behrens
  • , A. Berlev
  • , U. Besserer
  • , K. Blaum
  • , F. Block
  • , S. Bobien
  • , B. Bornschein
  • , L. Bornschein
  • , H. Bouquet
  • , T. Brunst
  • , T. S. Caldwell
  • , S. Chilingaryan
  • , W. Choi
  • , K. Debowski
  • , M. Deffert
  • , M. Descher
  • , D. Díaz Barrero
  • P. J. Doe, O. Dragoun, G. Drexlin, S. Dyba, K. Eitel, E. Ellinger, R. Engel, S. Enomoto, D. Eversheim, M. Fedkevych, A. Felden, J. A. Formaggio, F. Fränkle, G. B. Franklin, H. Frankrone, F. Friedel, A. Fulst, K. Gauda, W. Gil, F. Glück, S. Grohmann, R. Grössle, R. Gumbsheimer, M. Hackenjos, V. Hannen, J. Hartmann, N. Haußmann, F. Heizmann, J. Heizmann, K. Helbing, S. Hickford, D. Hillesheimer, D. Hinz, T. Höhn, B. Holzapfel, S. Holzmann, T. Houdy, A. Jansen, C. Karl, J. Kellerer, N. Kernert, L. Kippenbrock, M. Klein, C. Köhler, L. Köllenberger, A. Kopmann, M. Korzeczek, A. Kovalík, B. Krasch, H. Krause, B. Kuffner, N. Kunka, T. Lasserre, L. La Cascio, O. Lebeda, B. Lehnert, J. Letnev, F. Leven, T. L. Le, S. Lichter, A. Lokhov, M. Machatschek, E. Malcherek, A. Marsteller, E. L. Martin, C. Melzer, A. Menshikov, S. Mertens, S. Mirz, B. Monreal, K. Müller, U. Naumann, H. Neumann, S. Niemes, M. Noe, H. W. Ortjohann, A. Osipowicz, E. Otten, D. S. Parno, A. Pollithy, A. W.P. Poon, J. M.L. Poyato, F. Priester, P. C.O. Ranitzsch, O. Rest, R. Rinderspacher, R. G.H. Robertson, C. Rodenbeck, P. Rohr, M. Röllig, C. Röttele, M. Ryšavý, R. Sack, A. Saenz, P. Schäfer, L. Schimpf, K. Schlösser, M. Schlösser, L. Schlüter, M. Schrank, B. Schulz, H. Seitz-Moskaliuk, W. Seller, V. Sibille, D. Siegmann, M. Slezák, F. Spanier, M. Steidl, M. Steven, M. Sturm, M. Suesser, M. Sun, D. Tcherniakhovski, H. H. Telle, L. A. Thorne, T. Thümmler, N. Titov, I. Tkachev, N. Trost, K. Valerius, D. Vénos, R. Vianden, A. P. Vizcaya Hernández, M. Weber, C. Weinheimer, C. Weiss, S. Welte, J. Wendel, J. F. Wilkerson, J. Wolf, S. Wüstling, W. Xu, Y. R. Yen, S. Zadoroghny, G. Zeller
  • Kernforschungszentrum Karlsruhe
  • Technical University of Munich
  • CEA
  • Humanoid Technologies Lab (H2T)
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • Max-Planck-Institut für Kernphysik
  • Max-Planck-Institut für Physik
  • University of North Carolina
  • Triangle Universities Nuclear Laboratory
  • Bergische Universität Wuppertal
  • Universidad Autónoma de Madrid
  • University of Washington
  • Nuclear Physics Institute of the Cas
  • University of Münster
  • Rheinische Friedrich-Wilhelms-Universität Bonn
  • Massachusetts Institute of Technology
  • Carnegie Mellon University
  • Lawrence Berkeley National Laboratory
  • University of Applied Sciences (HFD) Fulda
  • Case Western Reserve University
  • Johannes Gutenberg University
  • Humboldt-Universität zu Berlin

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)-neutrino mass with a sensitivity of 0.2eV/c2 by precisely measuring the endpoint region of the tritium β-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.

Original languageEnglish
Article number821
JournalEuropean Physical Journal C
Volume80
Issue number9
DOIs
StatePublished - 1 Sep 2020
Externally publishedYes

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