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Suppression of Penning discharges between the KATRIN spectrometers

Aker, M. 1,2; Altenmüller, K.; Beglarian, A. 3; Behrens, J. 1,4; Berlev, A.; Besserer, U. 1,2; Blaum, K.; Block, F. 4; Bobien, S. 2; Bornschein, B. 1,2; Bornschein, L. 1; Bouquet, H. 3; Brunst, T.; Caldwell, T. S.; Chilingaryan, S. ORCID iD icon 3; Choi, W. 4; Debowski, K.; Deffert, M. 4; Descher, M. 4; ... mehr


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 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.

Verlagsausgabe §
DOI: 10.5445/IR/1000123468
Veröffentlicht am 10.09.2020
DOI: 10.1140/epjc/s10052-020-8278-y
Zitationen: 6
Web of Science
Zitationen: 4
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Institut für Kernphysik (IKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2020
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
KITopen-ID: 1000123468
HGF-Programm 51.03.02 (POF III, LK 01) Katrin
Erschienen in The European physical journal / C
Verlag Springer-Verlag
Band 80
Heft 9
Seiten Article: 821
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Vorab online veröffentlicht am 04.09.2020
Nachgewiesen in arXiv
Web of Science
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