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Simulation of the KATRIN Source Plasma using Monte Carlo and Particle in Cell Methods

Kellerer, Jonas 1
1 Institut für Experimentelle Teilchenphysik (ETP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the effective electron anti-neutrino mass with a sensitivity down to 0.2 eV/c$^2$ (90\% CL) through spectroscopy of gaseous tritium $\beta$-decay in the endpoint region. This challenging goal can only be reached through a precise examination of all systematic effects of the experiment. One of these effects is caused by a plasma in the highly luminous windowless gaseous tritium source. The plasma is generated by beta decay, subsequent partial ionization of the surrounding tritium gas. It produces an ab initio inhomogeneous potential throughout the source, which can change the shape of the measured electron spectrum.
The exterior experimental conditions generate unconventional plasma conditions resulting in a highly magnetized, partly collisional, multi-species, non-thermal (with thermal components), bound plasma. The combination of these properties makes an analytical description impossible. This thesis therefore focuses on the development and results of a new model of the plasma, using an iterative approach between the newly developed Monte Carlo code KARL and the particle in cell code ACRONYM.

Volltext §
DOI: 10.5445/IR/1000143868
Veröffentlicht am 25.03.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Hochschulschrift
Publikationsdatum 25.03.2022
Sprache Englisch
Identifikator KITopen-ID: 1000143868
HGF-Programm 51.13.02 (POF IV, LK 01) KATRIN
Verlag Karlsruher Institut für Technologie (KIT)
Umfang 181 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Physik (PHYSIK)
Institut Institut für Experimentelle Teilchenphysik (ETP)
Prüfungsdatum 28.01.2022
Projektinformation 05A2017 - KATRIN (BMBF, 05A17VK2)
Schlagwörter neutrino physics, KATRIN, plasma, simulation, Monte Carlo, Particle in Cell
Referent/Betreuer Drexlin, Guido
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