The radiation gas detectors with novel nanoporous converter for medical imaging applications

H. Zarei, S. Saramad

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


For many reason it is tried to improve the quantum efficiency (QE) of position sensitive gas detectors. For energetic X-rays, the imaging systems usually consist of a bulk converter and gas amplification region. But the bulk converters have their own limitation. For X-rays, the converter thickness should be increased to achieve a greater detection efficiency, however in this case, the chance of escaping the photoelectrons is reduced. To overcome this limitation, a new type of converter, called a nanoporous converter such as Anodizing Aluminum Oxide (AAO) membrane with higher surface to volume ratio is proposed. According to simulation results with GATE code, for this nanoporous converter with the 1 mm thickness and inter pore distance of 627 nm, for 20-100 keV X-ray energies with a reasonable gas pressure and different pore diameters, the QE can be one order of magnitude greater than the bulk ones, which is a new approach for proposing high QE position sensitive gas detectors for medical imaging application and also high energy physics.

Original languageEnglish
Article numberC02053
JournalJournal of Instrumentation
Issue number2
Publication statusPublished - 2018 Feb 27
Externally publishedYes


  • Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)
  • Gaseous detectors
  • X-ray detectors

ASJC Scopus subject areas

  • Mathematical Physics
  • Instrumentation


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