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Proceedings Paper

X-ray imaging gas scintillation detector with CsI-wire chamber UV-photon readout
Author(s): Volker Dangendorf; Amos Breskin; Rachel Chechik; Horst W. Schmidt-Boecking
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Paper Abstract

UV-photons from an Xe-filled gas scintillation counter are detected with a CsI photocathode coupled to a double stage, low-pressure wire chamber. The high quantum efficiency, (9 pct), of the UV-detector yields a high detection efficiency of both primary and secondary scintillation photons. An energy resolution of 4.1 pct (FWHM) was recorded with 60 keV X-rays, inducing secondary scintillation in 5 bar of Xe; the wire chamber operated at 20 Torr of CH4. The two-dimensional planar localization of UV-photons, combined with the drift time measurement of primary electrons, provides a three-dimensional, multihit, imaging capability of X-ray photon interactions, with a resolution of 2-3 mm (FWHM). The stability of the CsI photocathode under different operation conditions and its sensitivity to exposure to air are discussed.

Paper Details

Date Published: 1 July 1990
PDF: 15 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19153
Show Author Affiliations
Volker Dangendorf, Weizmann Institute of Science (Israel)
Amos Breskin, Weizmann Institute of Science (Israel)
Rachel Chechik, Weizmann Institute of Science (Israel)
Horst W. Schmidt-Boecking, Univ. Frankfurt (Germany)

Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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