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Suppression of Penning discharges between the KATRIN spectrometers
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SYSNO ASEP 0532607 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Suppression of Penning discharges between the KATRIN spectrometers Author(s) Aker, M. (DE)
Altenmuller, K. (DE)
Beglarian, A. (DE)
Behrens, J. (DE)
Berlev, A. I. (RU)
Besserer, U. (DE)
Blaum, K. (DE)
Dragoun, Otokar (UJF-V) RID, SAI
Fedkevych, M. (DE)
Kovalík, Alojz (UJF-V) RID, ORCID, SAI
Lebeda, Ondřej (UJF-V) RID, ORCID, SAI
Ryšavý, Miloš (UJF-V) RID, ORCID, SAI
Vénos, Drahoslav (UJF-V) RID, SAI, ORCIDNumber of authors 155 Article number 821 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 80, č. 9 (2020)Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords KATRIN ; neutrino ; spectrometers Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Particles and field physics R&D Projects LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTT19005 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000569786700005 EID SCOPUS 85090276093 DOI 10.1140/epjc/s10052-020-8278-y Annotation 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 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. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021 Electronic address https://doi.org/10.1140/epjc/s10052-020-8278-y
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