Measurement of electron drift velocities in the mixture of Xe and He for a new high-pressure Xe gamma-ray detector

Shingo Kobayashi^*, Valery V. Dmitrenko, Tadayoshi Doke, Victor M. Grachev, Nobuyuki Hasebe, Tsutomu Igarashi, Takashi Miyachi, Hiroyuki Okada, Eido Shibamura, Masatoshi Takenouchi, Sergey E. Ulin, Konstantin F. Vlasik