Measurement of electron multiplication and ionization coefficients in high-pressure xenon

Electron multiplication in high-pressure pure xenon was studied in the 0.5–3.0 MPa pressure range using a cylindrical proportional counter. The electron multiplication factor and the first Townsend ionization coefficient were determined, thus expanding collective knowledge beyond the previous studie...

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Published inNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 937; pp. 53 - 58
Main Authors Kusano, Hiroki, Lopes, José A. Matias, Hasebe, Nobuyuki
Format Journal Article
LanguageEnglish
Japanese
Published Elsevier B.V 01.09.2019
Elsevier BV
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ISSN0168-9002
1872-9576
DOI10.1016/j.nima.2019.05.016

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Summary:Electron multiplication in high-pressure pure xenon was studied in the 0.5–3.0 MPa pressure range using a cylindrical proportional counter. The electron multiplication factor and the first Townsend ionization coefficient were determined, thus expanding collective knowledge beyond the previous studies, which were limited to 1.0 MPa. The measured electron multiplication factor falls between 15 and 2400 for the investigated pressure range. The density-reduced first Townsend ionization coefficient in this work is larger than that obtained for low-pressure xenon. In addition, the density-reduced first Townsend ionization coefficient was found to be density dependent. It was also found that the energy resolution deteriorates with increasing pressure. However, when the electron multiplication factor is several hundred, the energy resolution in high-pressure pure xenon was found to be better than that in commonly used xenon-based gas mixtures.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2019.05.016