MCP-PMT development for Belle-II TOP counter

11 Jun 2011, 08:30
25m
Chicago Ballroom 9 (Sheraton Hotel)

Chicago Ballroom 9

Sheraton Hotel

Oral Presentation Photon Detectors Photon Detectors

Speaker

Dr Kenji Inami (Nagoya university)

Description

We present recent R&D results for a multiple-anode MCP-PMT being developed for the Belle-II Time Of Propagation (TOP) counter. This detector is a hybrid cherenkov ring imaging and timing detector for particle identification in the barrel region of the upgraded detector. The Belle-II experiment will operate at high event rates and needs to withstand the correspondingly high background environment. MCP-PMTs have demonstrated excellent single photon timing resolution. However, the lifetime of photocathode is a known issue. Recently, we successfully improved the lifetime of a 25mm square-shape MCP-PMT by a factor of ~10, which is adequate for estimates of the nominal Belle-II background rates in the TOP counter. We have also developed a new MCP-PMT with Hamamatsu that adopts a super-bialkali photocathode. Currently a peak quantum efficiency of 28% for 400nm photons has been achieved.

Author

Dr Kenji Inami (Nagoya university)

Presentation materials