Speaker
Samo Korpar
(Uni Maribor)
Description
A proximity focusing RICH with aerogel radiator has been studied to further
improve the pion-kaon separation in the forward region of the Belle
spectrometer. Such a proximity focusing RICH counter is also a very fast
detector, in particular if a micro-channel plate (MCP) PMT is used as the
photon detector. With its excellent timing properties, the same device could
also serve as a time-of-flight counter and thus supplement other
identification methods, in particular for low momentum tracks. Cherenkov
photons emitted in the radiator medium (aerogel) as well as in the entrance
window of the PMT could be used for the time-of-flight measurement. A
prototype of this novel device using BURLE 85011 64-anode, microchannel
plate PMT, was tested on the bench and in the test beam at KEK. Excellent
performance of this counter could be demonstrated. In particular, a good
separation of pions and protons was observed in the test beam data with a
time-of-flight resolution of about 35ps (rms) for Cherenkov photons
produced in the PMT window.
Primary author
Samo Korpar
(Uni Maribor)
