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)