Virtual Frisch-grid ionization chambers filled with high-pressure Xe

Aleksey E. Bolotnikov; Robert Austin; Alexander Bolozdynya; John D. Richards

doi:10.1117/12.564432

21 October 2004 Virtual Frisch-grid ionization chambers filled with high-pressure Xe

Aleksey E. Bolotnikov, Robert Austin, Alexander Bolozdynya, John D. Richards

Proceedings Volume 5540, Hard X-Ray and Gamma-Ray Detector Physics VI; (2004) https://doi.org/10.1117/12.564432
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

New approaches to the design of high-pressure Xe (HPXe) ionization chambers are described. HPXe ionization chambers represent a well-known technique for detecting gamma rays in the energy range between 50 keV and 3 MeV. Since the HPXe detector is an electron-only carrier device, its commonly accepted design includes a Frisch-grid-a metal mesh employed for the electrostatic shielding from the immobile positive ions. The grid is a key element of the device’s design which provides good energy resolution of the detector, typically 2-3% FWHM at 662 keV. However, the grid makes the design more complex and less rugged, especially for field applications. Recently, we developed several designs of HPXe ionization chambers without shielding grids. The results obtained from the testing of these devices are presented here.

Citation Download Citation

Aleksey E. Bolotnikov, Robert Austin, Alexander Bolozdynya, and John D. Richards "Virtual Frisch-grid ionization chambers filled with high-pressure Xe", Proc. SPIE 5540, Hard X-Ray and Gamma-Ray Detector Physics VI, (21 October 2004); https://doi.org/10.1117/12.564432

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