Commissioning of the Cylindrical Drift Chamber for the COMET experimenthttp://www-comet.kek.jp/COMET5/publications/commissioning-of-the-cylindrical-drift-chamber-for-the-comet-experimenthttp://www-comet.kek.jp/COMET5/@@site-logo/logo.png
Commissioning of the Cylindrical Drift Chamber for the COMET experiment
M. Moritsu*, Y. Kuno, Y. Matsuda, Y. Nakazawa, S. Ohta, H. Sakamoto, A. Sato, M.L. Wong, T. Wong, C. Wu, H. Yoshida, X. Jiang, H.b. Li, Y. Nakatsugawa and J. Zhang
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.
