Pixelated designs of high pressure xenon gamma-ray spectrometers and position sensing

Yuxin Feng, James E. Baciak, Clair Sullivan, Gary Gardner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The energy resolution and position sensing with two types of pixelated anode designs of high pressure xenon Gamma-ray spectrometer were investigated. The first design is composed of a single planar cathode and four anode pixels embedded in the center of a "non-collecting" anode plate. The second design is composed of a cylindrical surface cathode and seven pixelated central cylinder anodes. These designs remove the Frisch grid which can suffer from excessive micro-phonics in real-world applications. The distribution of electron cloud created by interaction between gamma-rays and Xe was obtained with Monte Carlo (GEANT4) simulations and shows the dimension of electron clouds increasing from approximately 0.1 mm to ∼100 mm for gamma-ray energy range from 50 keV to 10 MeV in Xe at ∼50 atm pressure (∼0.5g/cm 3 density). The charge collecting efficiency and waveform of induced charge on each anode were obtained by tracking electron cloud drifting. The position sensing based on both position dependence of weighting potential and the distribution of induced charge among anode pixels were also probed.

Original languageEnglish (US)
Title of host publicationHard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII
DOIs
StatePublished - Nov 13 2006
EventHard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII - San Diego, CA, United States
Duration: Aug 14 2006Aug 17 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6319
ISSN (Print)0277-786X

Other

OtherHard X-Ray and Gamma-Ray Detector Physics and Penetrating Radiation Systems VIII
CountryUnited States
CitySan Diego, CA
Period8/14/068/17/06

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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