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T: Fachverband Teilchenphysik

T 106: Experimental Techniques in Astroparticle Physics 4

T 106.3: Talk

Thursday, March 24, 2022, 16:45–17:00, T-H38

First Results of the PMT Acceptance Tests for the IceCube Upgrade mDOMs — •Johannes Werthebach¹, Hannah Erpenbeck², Maja Freienhofer¹, Lasse Halve², Konstantin Mrozik¹, and Christopher Wiebusch² for the IceCube collaboration — ¹Astroparticle Physics WG Rhode, TU Dortmund University, Germany — ²III. Physikalisches Institut B, RWTH Aachen University

For the IceCube Upgrade seven new strings will be deployed in the centre of the IceCube Neutrino Observatory. Each string contains several types of modules and in total more than 400 multiple-PMT Digital Optical Modules (mDOMs), with 24 3No-dq Photomultiplier Tubes (PMTs) each, will be frozen into the glacial ice at the South Pole. Testing these PMTs for compliance with manufacturer specifications is crucial before integration into the final mDOM. Utilizing two test facilities at RWTH Aachen University and TU Dortmund University with fully automated operation allows for mass testing of all PMTs. Here, we present the results of the characterization tests for the first batch of PMTs.