Open AccessElectron and ion transmission of the gating foil for the TPC in the ILC experiment
Author(s) -
M. Kobayashi,
T. Ogawa,
Aiko Shoji,
Yumi Aoki,
K. Ikematsu,
P. Gros,
Toshiro Kawaguchi,
D. Arai,
M. Iwamura,
K. Katsuki,
A. Koto,
M. Yoshikai,
Kotaro Fujii,
T. Fusayasu,
Y. Kato,
S. Kawada,
Takeshi Matsuda,
S. Narita,
K. Negishi,
Huirong Qi,
R. Settles,
A. Sugiyama,
Tohru Takahashi,
Jinshou Tian,
Takashi Watanabe,
R. Yonamine
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1498/1/012020
Subject(s) - foil method , ion , atomic physics , international linear collider , backflow , electron , gating , physics , voltage , gas electron multiplier , optics , laser , range (aeronautics) , aperture (computer memory) , materials science , nuclear physics , mechanical engineering , physiology , quantum mechanics , detector , acoustics , composite material , inlet , biology , engineering
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.