Speaker
Kenji Inami
(Nagoya university)
Description
We have been developing a Cherenkov ring-imaging detector as a barrel
particle identification device, named TOP (Time-Of-Propagation), for
the Belle-II experiment. In this presentation, we will show the overview
of TOP detector, the production results and focus on the MCP-PMT development
and its improved performance.
We have successfully produced the detector modules, which consist of the
2.7m long quartz radiator, supporting mechanics, MCP-PMTs and readout
electronics, by developing many tools and method.
Along with the construction, we also have developed the lifetime-improved
MCP-PMT with Hamamatsu photonics, to keep the performance for long period
even under higher background environment than the expected rate at SuperKEKB.
We adopted the ALD technique to the micro-channel-plate and applied further
improvement at the production step, then the mass production for the TOP
detector was successfully done. We will present the obtained performance of
the MCP-PMTs for the gain, time resolution, quantum efficiency and the lifetime.
Author
Kenji Inami
(Nagoya university)
