Study of hole-type gas multiplication structures for portal imaging and other high count rate applications

Ostling J., Brahme A., Danielsson M., Francke T., Iacobaeus C., Peskov V.

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol.50, no.4, pp.809-819, 2003 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 50 Issue: 4
  • Publication Date: 2003
  • Doi Number: 10.1109/tns.2003.814562
  • Journal Name: IEEE TRANSACTIONS ON NUCLEAR SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.809-819
  • Keywords: camillary plates, GEM, high counting rate, portal imaging, RATE GASEOUS DETECTORS, PREAMPLIFICATION STRUCTURES, ELECTRON MULTIPLIER, GEM, LIMITATIONS, CHAMBERS, PLATE, LIGA
  • Bursa Uludag University Affiliated: No

Abstract

We performed studies in the operation of various hole-type gaseous multiplication structures (GEM, capillary plates, and others) at very high fluxes of X-rays (<60 keV-bremsstrahlung) and pulsed gamma radiation (<50 MeV-bremsstrahlung). In the case of X-rays, the counting rate was 10(5)-10(6) Hz/mm(2); in the case of gammas it reached levels of up to 10(9) Hz/mm(2) during the pulses. In most measurements, the entire area of the detector was exposed to these extremely high fluxes. Results obtained so far indicate that the GEM and the hydrogen-treated capillary plates could be successfully used in medical imaging applications.