Electron and ion transmission of the gating foil for the TPC in the ILC experiment. (April 2020)

• Record Type: Journal Article
• Authors: Kobayashi, M; Ogawa, T; Shoji, A; Aoki, Y; Ikematsu, K; Gros, P; Kawaguchi, T; Arai, D; Iwamura, M; Katsuki, K; Koto, A; Yoshikai, M; Fujii, K; Fusayasu, T; Kato, Y; Kawada, S; Matsuda, T; Narita, S; Negishi, K; Qi, H; Settles, R D; Sugiyama, A; Takahashi, T; Tian, J; Watanabe, T; Yonamine, R
• Is Part Of: Journal of physics. Volume 1498(2020)
• Publication Date: 2020-04
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1498/1/012020
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We have developed a gating foil for the time projection chamber envisaged as a central tracker for the international linear collider experiment. It has a structure similar to the Gas Electron Multiplier (GEM) with a higher optical aperture ratio and functions as an ion gate without gas amplification. The transmission rate for electrons was measured in a counting mode for a wide range of the voltages applied across the foil using an 55 Fe source and a laser in the absence of a magnetic field. The upper limit of the transmission rate for positive ions was estimated to be 3.36 ± 0.05 (stat. only)) × 10 −4 from the measured electron transmission at a relatively low reverse bias voltage applied to the foil (Δ V =−15.5 V). The blocking power of the gating foil was confirmed to be high enough to suppress the influence of ion backflow.