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 × 10−15, 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.
|Journal||Proceedings of Science|
|Publication status||Published - 2019|
|Event||2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 - Ghent, Belgium|
Duration: Jul 10 2019 → Jul 17 2019
All Science Journal Classification (ASJC) codes