Physics
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1222..412n&link_type=abstract
NEUTRINO FACTORIES, SUPERBEAMS, AND BETA BEAMS: 11th International Workshop on Neutrino Factories, Superbeams and Beta Beams-NuF
Physics
Muon Capture, Photomultiplier Tubes, Cherenkov Counters, Scintillation, Muons, Gas-Filled Counters: Ionization Chambers, Proportional, And Avalanche Counters, Cherenkov Detectors, Scintillation Detectors
Scientific paper
The COMET experiment searches for a muon to electron conversion process that is one of the lepton flavor violation processes. We use an 8-GeV pulsed proton beam. The proton extinction ratio is an important parameter. In order to measure this ratio pulse-by-pulse, we are developing a monitoring device. This device is called Proton Extinction Monitor and is a gas Čerenkov detector with gating photomultiplier tubes(PMT). The result of the investigation is that ethane is a promising gas for the Čerenkov radiator gas. A gating PMT is under development. We fabricated a divider circuit which switches at 10-kHz and has a cutoff ratio of 10-6.
Ito Nobuyasu
Kuno Yoshitaka
Masaharu A.
Nakadozono N.
Sato Akinori
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