Author/Authors :
Emi، نويسنده , , Keiko and Tsukamoto، نويسنده , , Toshifumi and Hirano، نويسنده , , Hiroyuki and Mamada، نويسنده , , Haruhiko and Sakai، نويسنده , , Yoshihide and Uno، نويسنده , , Shoji and Itami، نويسنده , , Shunsuke and Kajikawa، نويسنده , , Ryoichi and Nitoh، نويسنده , , Osamu and Ohishi، نويسنده , , Noritsugu and Sugiyama، نويسنده , , Akira K. Suzuki، نويسنده , , Shiro and Takahashi، نويسنده , , Kaoru a، نويسنده ,
Abstract :
We studied the performance of a dEdx measurement using an actual real-size prototype of the Central Drift Chamber for the KEK B-Factory. The observed dependences on the track incident angles showed a gas-gain saturation effect due to the space-charge. This gas-gain saturation caused the chamber response to dEdx of the incident particles to be weaker. We measured gas-gain saturation as a function of the line-charge density on a sense wire made by an incident charged particle, and observed that the line-charge density dominantly determined the gas-gain saturation.
