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Calibration of a Laser-Raman-System using gas samples of all hydrogen isotopologues for KATRIN

Niemes, Simon

Abstract (englisch):
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to measure the effective electron anti-neutrino mass via high-precision spectroscopy of the energy spectrum of the β-electrons from tritium decay near the 18.6 keV endpoint. In order to achieve the design sensitivity of m(νₑ) = 0.2 eV (90% C.L.), KATRIN uses a high-luminosity Windowless Gaseous Tritium Source (WGTS), which is temperature and activity stabilised on the part-per-mille level.

Due to technical reasons, the molecular T₂ inside the WGTS will always contain residues of other hydrogen isotopologues (H₂, HD, D₂, HT and DT). As the gas composition influences the shape of the β-spectrum, it must be considered in the neutrino mass analysis and hence continuously monitored. At the Tritium Laboratory Karlsruhe (TLK), tritium-compatible Laser Raman systems (LARA) were developed in order to meet the performance requirements of KATRIN. For quantitative composition analysis, the system- and isotopologue-specific response function must be obtained.

The main focus of this work is the direct experimental validation of the KATRIN-relevant calibration factors for the radioactive isotopologues T₂, HT and DT. ... mehr

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Volltext §
DOI: 10.5445/IR/1000128966
Veröffentlicht am 02.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Hochschulschrift
Publikationsdatum 02.02.2021
Sprache Englisch
Identifikator KITopen-ID: 1000128966
Auflage IX, 184 S.
Verlag Karlsruher Institut für Technologie (KIT)
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Institut für Astroteilchenphysik (IAP)
Prüfungsdatum 15.01.2021
Referent/Betreuer Prof. G. Drexlin
Schlagwörter Raman spectroscopy, tritium, gas composition monitoring, hydrogen isotopes, mixtures
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