München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Instrumentation VIII

HK 39.3: Talk

Wednesday, March 20, 2019, 14:45–15:00, HS 11

Performance of most advanced 2-inch MCP-PMT tubes from PHOTONIS and Hamamatsu — •Markus Pfaffinger, Merlin Böhm, Steffen Krauss, Albert Lehmann, Daniel Miehling, Márton Németh-Csóka, Nico Schwarm, and Samuel Stelter — Physikalisches Institut , Universität Erlangen-Nürnberg

The PANDA experiment at the new FAIR facility will use two DIRC detectors for particle identification. The focal plane of both detectors will be located inside a magnetic field of >1 Tesla. Microchannel-Plate Photomultipliers (MCP-PMTs) are the favored sensors for the detection of the Cherenkov photons.

Coating the MCPs with an atomic layer deposition (ALD) technique has increased the lifetime of MCP-PMTs more than a factor of 50 making them durable enough to be used in high luminosity experiments like PANDA. The performance of the most recent lifetime-enhanced tubes from PHOTONIS (XP85112/A1-Q-HA 9002108) and Hamamatsu (R13266-07-M64M YH0250) have been tested in Erlangen. The results concerning QE, gain, time resolution, rate capability, darkcount rate, afterpulsing and crosstalk will be discussed in this talk.

These sensors have meanwhile also been included in the Erlangen lifetime setup where their quantum efficiency (QE) is monitored in correlation with the integrated anode charge (IAC). The lifetime performance of both new devices will be compared to other lifetime-enhanced MCP-PMTs measured with the same setup.

- Funded by BMBF and GSI -