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@article{WU2021165756,
title = {Test of a small prototype of the COMET cylindrical drift chamber},
journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
volume = {1015},
pages = {165756},
year = {2021},
issn = {0168-9002},
doi = {https://doi.org/10.1016/j.nima.2021.165756},
url = {https://www.sciencedirect.com/science/article/pii/S0168900221007415},
author = {C. Wu and T.S. Wong and Y. Kuno and M. Moritsu and Y. Nakazawa and A. Sato and H. Sakamoto and N.H. Tran and M.L. Wong and H. Yoshida and T. Yamane and J. Zhang},
keywords = {Drift chamber, Helium-based gas, Spatial resolution, COMET},
abstract = {The performance of a small prototype of a cylindrical drift chamber (CDC) used in the COMET Phase-I experiment was studied by using an electron beam. The prototype chamber was constructed with alternating all-stereo wire configuration and operated with the He−iC4H10(90/10) gas mixture without a magnetic field. The drift space–time relation, drift velocity, dE/dx resolution, hit efficiency, and spatial resolution as a function of distance from the wire were investigated. The average spatial resolution of 150 μm with the hit efficiency of 99% was obtained at applied voltages higher than 1800V. We have demonstrated that the design and gas mixture of the prototype match the operation of the COMET CDC.}
}