Development of a bunch-width monitor for low-intensity muon beam below a few MeV
oleh: Yuki Sue, Mai Yotsuzuka, Kenta Futatsukawa, Kazuo Hasegawa, Toru Iijima, Hiromi Iinuma, Kenji Inami, Katsuhiro Ishida, Naritoshi Kawamura, Ryo Kitamura, Yasuhiro Kondo, Tsutomu Mibe, Yasuhiro Miyake, Takatoshi Morishita, Yuga Nakazawa, Masashi Otani, Naohito Saito, Koichiro Shimomura, Yusuke Takeuchi, Takahiro Ushizawa, Takayuki Yamazaki, Hiromasa Yasuda
| Format: | Article |
|---|---|
| Diterbitkan: | American Physical Society 2020-02-01 |
Deskripsi
A destructive monitor to measure the longitudinal bunch width of a low-energy and low-intensity muon beam was developed. This bunch-width monitor (BWM) employed microchannel plates to detect a single muon with high time resolution. In addition, constant-fraction discriminators were adopted to suppress the time-walk effect. The time resolution was measured to be 65 ps in rms using a picosecond-pulsed laser. This resolution satisfied the requirements of the muon linac of the J-PARC E34 experiment. We measured the bunch width of negative-muonium ions (μ^{+}e^{-}e^{-}) accelerated with a radio-frequency quadrupole using the BWM. The bunch width was successfully measured to be σ=0.54±0.11 ns, which is consistent with the simulation.