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A novel technique for the measurement of the avalanche fluctuations of a GEM stack using a gating foil.

Authors :
Kobayashi, M.
Yumino, K.
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.
Mizuno, T.
Nakajima, J.
Source :
Nuclear Instruments & Methods in Physics Research Section A. Sep2022, Vol. 1039, pN.PAG-N.PAG. 1p.
Publication Year :
2022

Abstract

We have developed a novel technique for the measurement of the size of avalanche fluctuations of gaseous detectors using a gating device (gating foil) prepared for the time projection chamber in the international linear collider experiment (ILD-TPC). In addition to the gating function, the gating foil is capable of controlling the average fraction of drift electrons detected after gas amplification. The signal charge width and shape (skewness) for electron–ion pairs created by a pulsed UV laser as a function of the transmission rate of the gating foil can be used to determine the relative variance of gas gain for single electrons. We present the measurement principle and the result obtained using a stack of gas electron multipliers (GEMs) operated in a gas mixture of Ar-C F 4 (3%)-isobutane (2%) at atmospheric pressure. Also discussed is the influence of the avalanche fluctuations on the spatial resolution of the ILD-TPC. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01689002
Volume :
1039
Database :
Academic Search Index
Journal :
Nuclear Instruments & Methods in Physics Research Section A
Publication Type :
Academic Journal
Accession number :
158513778
Full Text :
https://doi.org/10.1016/j.nima.2022.166872