Number of the records: 1
Gamma-induced background in the KATRIN main spectrometer
- 1.
SYSNO ASEP 0509890 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gamma-induced background in the KATRIN main spectrometer Author(s) Altenmuller, K. (DE)
Arenz, M. (DE)
Baek, W. -J. (DE)
Beck, M. (DE)
Beglarian, A. (DE)
Behrens, J. (DE)
Dragoun, Otokar (UJF-V) RID, SAI
Kovalík, Alojz (UJF-V) RID, ORCID, SAI
Lebeda, Ondřej (UJF-V) RID, ORCID, SAI
Ryšavý, Miloš (UJF-V) RID, ORCID, SAI
Suchopár, Martin (UJF-V)
Vénos, Drahoslav (UJF-V) RID, SAI, ORCIDNumber of authors 126 Article number 807 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 79, č. 9 (2019)Number of pages 12 s. Publication form Print - P Language eng - English Country DE - Germany Keywords KATRIN spectrometer ; rate of background ; main spectrometer Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LTT18021 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 000487944300001 EID SCOPUS 85073218479 DOI 10.1140/epjc/s10052-019-7320-4 Annotation he KATRIN experiment aims to measure the effective electron antineutrino mass m nu over bar e with a sensitivity of 0.2eV/c2 using a gaseous tritium source combined with the MAC-E filter technique. A low background rate is crucial to achieving the proposed sensitivity, and dedicated measurements have been performed to study possible sources of background electrons. In this work, we test the hypothesis that gamma radiation from external radioactive sources significantly increases the rate of background events created in the main spectrometer (MS) and observed in the focal-plane detector. Using detailed simulations of the gamma flux in the experimental hall, combined with a series of experimental tests that artificially increased or decreased the local gamma flux to the MS, we set an upper limit of 0.006count/s (90% C.L.) from this mechanism. Our results indicate the effectiveness of the electrostatic and magnetic shielding used to block secondary electrons emitted from the inner surface of the MS. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2020 Electronic address https://doi.org/10.1140/epjc/s10052-019-7320-4
Number of the records: 1