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

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

IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC), Norfolk, İngiltere, 10 - 16 Kasım 2002, ss.619-623 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Norfolk
  • Basıldığı Ülke: İngiltere
  • Sayfa Sayıları: ss.619-623
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

We performed studies of operation of various hole-type gas multiplication structures (GEM, capillary plates and others) at very high fluxes of x-rays (<60 keV - brehmstrahlung) and pulsed gamma radiation (< 50 MeV - brehmstrahlung). In the case of x-rays the counting rate was 10(5)-10(6) Hz/mm(2) and in the case of gamma it reached up to 10(9) Hz/mm(2) during the pulses. In most of the measurements all detector-area 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.