Gießen 2024 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Instrumentation X
HK 40.2: Talk
Wednesday, March 13, 2024, 16:00–16:15, HBR 19: C 2
Performance of the latest series production MCP-PMTs for the PANDA Barrel DIRC — •Katja Gumbert, Merlin Böhm, Mirijam Götz, Steffen Krauss, Albert Lehmann, and Daniel Miehling for the PANDA collaboration — Physikalisches Institut, Universität Erlangen-Nürnberg
The PANDA detector at FAIR will use two DIRC detectors for particle identification through Cherenkov light. Given the placement of the photosensors within magnetic fields of 1 Tesla, the designated sensors are Microchannel-Plate Photomultipliers (MCP-PMTs). The Barrel DIRC, which surrounds the beam line and the interaction point, will apply 128 MCP-PMTs of the type XP85112-S-BA manufactured by Photonis. These sensors have an active area of 2x2 inch2 with an 8x8 anode pixel configuration and two MCPs with a pore diameter of 10 µ m. 155 MCP-PMTs of this type have been ordered and are subject to a quality control process in Erlangen before deployment in PANDA. This process includes among other measures test measurements of both the quantum and the collection efficiency, gain distribution analysis as well as measurements of the time resolution, the dark count rate, the afterpulse probability and the rate capability. The start of series production of these sensors led to new challenges and revealed new effects that require thorough analysis. The first >30 sensors have arrived in Erlangen and faced the quality control. The perfomance results obtained with the latest tubes will be presented in this talk. Furthermore, an update on the lifetime performance of the latest MCP-PMTs will be shown. - Funded by BMBF and GSI -
Keywords: MCP-PMTs