Commissioning of the cylindrical drift chamber for the COMET experiment

Manabu Moritsu, Yoshitaka Kuno, Yugo Matsuda, Yu Nakazawa, Saki Ohta, Hideyuki Sakamoto, Akira Sato, Ming Liang Wong, Ting Sam Wong, Chen Wu, Hisataka Yoshida, Xiaoshan Jiang, Hai Bo Li, Yohei Nakatsugawa, Jie Zhang

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


A cylindrical drift chamber (CDC) has been developed for the COMET Phase-I experiment. To search for the muon-to-electron conversion with a sensitivity of 3 × 1015, the CDC is required to have momentum resolution of 200 keV/c for 100-MeV/c electrons. In order to reduce the multiple scattering, we have selected a chamber gas mixture of 90% helium with 10% isobutane. Construction of the CDC was successfully conducted, and performance evaluation is being carried out. We have confirmed stable operation without a magnetic field thus far based on cosmic-ray tests. In this paper, the motivation, design, construction, and commissioning status of the CDC are presented.

Original languageEnglish
Article number128
JournalProceedings of Science
Publication statusPublished - 2019
Externally publishedYes
Event2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 - Ghent, Belgium
Duration: Jul 10 2019Jul 17 2019

All Science Journal Classification (ASJC) codes

  • General


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