R&D on Proton Extinction Monitor for COMET Project | Zendy

Naoyuki Nakadozono | Zendy; A. Masaharu | Zendy; Y. Kuno | Zendy; Akira Sato | Zendy; T. Yano | Zendy; N. Ito | Zendy; Takashi Taniguchi | Zendy; Daniel M. Kaplan | Zendy; Maury Goodman | Zendy; Zack Sullivan | Zendy

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R&D on Proton Extinction Monitor for COMET Project

Author(s) -

Naoyuki Nakadozono,

A. Masaharu,

Y. Kuno,

Akira Sato,

T. Yano,

N. Ito,

Takashi Taniguchi,

Daniel M. Kaplan,

Maury Goodman,

Zack Sullivan

Publication year - 2010

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.3399356

Subject(s) - photomultiplier , physics , detector , proton , extinction (optical mineralogy) , muon , nuclear physics , comet , extinction ratio , radiator (engine cooling) , optics , astronomy , wavelength

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 Cerenkov detector with gating photomultiplier tubes(PMT). The result of the investigation is that ethane is a promising gas for the Cerenkov 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.

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