X-ray imaging gas scintillation detector with CsI-wire chamber UV-photon readout

Volker Dangendorf; Amos Breskin; Rachel Chechik; Horst W. Schmidt-Boecking

doi:10.1117/12.19153

1 July 1990 X-ray imaging gas scintillation detector with CsI-wire chamber UV-photon readout

Volker Dangendorf, Amos Breskin, Rachel Chechik, Horst W. Schmidt-Boecking

Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19153
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

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.

Citation Download Citation

Volker Dangendorf, Amos Breskin, Rachel Chechik, and Horst W. Schmidt-Boecking "X-ray imaging gas scintillation detector with CsI-wire chamber UV-photon readout", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19153

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