München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 62: Instrumentation XIII

HK 62.6: Talk

Friday, March 22, 2019, 15:30–15:45, HS 11

The eyes of XENONnT: Qualification tests of 494 photomultiplier tubes — •Oliver Wack and Luisa Hoetzsch for the XENON Collaboration — MPIK, Heidelberg, Germany

The next phase of the XENON dark matter direct detection experiments will be the XENONnT detector. Utilizing in total 8.4 tonnes of xenon in a dual-phase liquid xenon time projection chamber, its aim is to increase the sensitivity for direct dark matter detection by one order of magnitude to probe new regions of the parameter space.

The scintillation light induced within the detector volume by particle interactions will be detected with 494 photomultiplier tubes (PMTs). The Hamamatsu R11410 tube has been chosen for its high quantum efficiency and low intrinsic radioactivity to maximize the detector's sensitivity. Applying the knowledge gained during testing and operation of the previous detector, XENON1T, the characteristics and performance of the PMTs for XENONnT have been studied and tested extensively. The general testing procedures and the results of the testing campaign will be presented in this talk.