Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 20: Neutrinophysik I
T 20.1: Gruppenbericht
Montag, 19. März 2018, 16:00–16:20, Z6 - SR 2.012
The nEXO experiment — •Michael Wagenpfeil for the nEXO collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP
The nEXO experiment will be a multi-tonne LXe TPC to search for the neutrinoless double beta decay in Xe-136 with a target half-life sensitivity of approximately 1028 years. This improvement of two orders of magnitude over current experimental half-life limits is realised by using 5000 kg of isotopically enriched xenon, careful material selection and an improved design of the TPC. MC simulations derive a sensitivity to the effective Majorana neutrino mass between 5.7 and 17.7 meV on a 90 % C.L. depending on the nuclear matrix element calculation after 10 years live-time.
In order to realise this goal, it is crucial to achieve an excellent energy resolution which puts strong requirements on the performance of the TPC detector systems for both VUV scintillation photons and secondary charge carriers.
We give an overview of current sensitivity studies as well as the investigation of the charge-detecting anode tiles foreseen for nEXO. We also discuss the progress of the characterisation efforts of VUV-sensitive SiPMs which are planned to be employed as photo detectors covering the inside wall of the TPC.