Michael Schenk evaluates new technologies and methods, such as cryogenic read-out electronics and a UV laser system, developed to optimise the performance of large liquid argon time projection chambers (LAr TPC). Amongst others, the author studies the uniformity of the electric field produced by a Greinacher high-voltage generator operating at cryogenic temperatures, measures the linear energy transfer (LET) of muons and the longitudinal diffusion coefficient of electrons in liquid argon. The results are obtained by analysing events induced by cosmic-ray muons and UV laser beams. The studies are carried out with ARGONTUBE, a prototype LAr TPC in operation at the University of Bern, Switzerland, designed to investigate the feasibility of drift distances of up to five metres for electrons in liquid argon.
สารบัญ
Introduction.- The liquid argon time projection chamber.- The ARGONTUBE detector.- Regeneration system for argon purifiers.- The Greinacher high-voltage generator.- Realization of a GPU-based track finder.- Study of cosmic muon events.- UV laser methods and measurements.- Conclusions.
เกี่ยวกับผู้แต่ง
Michael Schenk obtained his master’s degree in Applied / Experimental Physics from the University of Bern, Switzerland, and is currently doing an internship at CERN, Geneva, Switzerland in the fields of collective effects and beam instabilities in particle accelerators.
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