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Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy

SYSNO ASEP	0532615
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy
Author(s)	Aker, M. (DE) Altenmuller, K. (DE) Beglarian, A. (DE) Behrens, J. (DE) Berlev, A. I. (RU) 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} Schlosser, M. (CH) Šefčík, Michal (UJF-V)_{ORCID, SAI} Slezák, Martin (UJF-V)_{RID, ORCID} Vénos, Drahoslav (UJF-V)_{RID, SAI, ORCID}
Number of authors	129
Article number	4827
Source Title	Sensors. - : MDPI Roč. 20, č. 17 (2020)
Number of pages	29 s.
Publication form	Print - P
Language	eng - English
Country	CH - Switzerland
Keywords	KATRIN ; Raman spectroscopy ; tritium ; gas composition monitoring
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	000570345700001
EID SCOPUS	85090172633
DOI	10.3390/s20174827
Annotation	The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c(2), i.e., improving on previous measurements by an order of magnitude. Neutrino mass data taking with KATRIN commenced in early 2019, and after only a few weeks of data recording, analysis of these data showed the success of KATRIN, improving on the known neutrino mass limit by a factor of about two. This success very much could be ascribed to the fact that most of the system components met, or even surpassed, the required specifications during long-term operation. Here, we report on the performance of the laser Raman (LARA) monitoring system which provides continuous high-precision information on the gas composition injected into the experiment's windowless gaseous tritium source (WGTS), specifically on its isotopic purity of tritium-one of the key parameters required in the derivation of the electron neutrino mass. The concentrationsc(x)for all six hydrogen isotopologues were monitored simultaneously, with a measurement precision for individual components of the order 10(-3)or better throughout the complete KATRIN data taking campaigns to date. From these, the tritium purity,epsilon(T), is derived with precision of <10(-3)and trueness of <3 x 10(-3), being within and surpassing the actual requirements for KATRIN, respectively.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2021
Electronic address	https://doi.org/10.3390/s20174827

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