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

Aker, M.; Altenmüller, K.; Beglarian, A.; Behrens, J.; Berlev, A.; Besserer, U.; Bieringer, B.; Blaum, K.; Block, F.; Bornschein, B.; Bornschein, L.; Böttcher, M.; Brunst, T.; Caldwell, T. C.; Chilingaryan, S.; Choi, W.; Díaz Barrero, D. D.; Debowski, K.; Deffert, M.; Descher, M.; ... mehr

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 concentrations c$_{x}$ 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. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124103
Veröffentlicht am 15.10.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Institut für Experimentelle Teilchenphysik (ETP)
Projekt-, Prozess- und Qualitätsmanagement (PPQ)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1424-8220
KITopen-ID: 1000124103
Erschienen in Sensors
Band 20
Heft 17
Seiten Art. Nr.: 4827
Vorab online veröffentlicht am 26.08.2020
Schlagwörter Raman spectroscopy, tritium, gas composition monitoring, KATRIN
Nachgewiesen in Web of Science
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