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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


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
HGF-Programm 51.13.01 (POF IV, LK 01) Neutrinophysik und Dunkle Materie
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
Schlagwörter Raman spectroscopy, tritium, gas composition monitoring, hydrogen isotopes, mixtures
Referent/Betreuer Drexlin, G.
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