Study of hole-type gas multiplication structures for portal imaging and other high count rate applications
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, vol.50, no.4, pp.809-819, 2003 (SCI-Expanded, Scopus)
- 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.