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Study of hole-type gas multiplication structures for portal imaging and other high count rate applications
KTH, Superseded Departments, Physics.
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2003 (English)In: IEEE Transactions on Nuclear Science, ISSN 0018-9499, E-ISSN 1558-1578, Vol. 50, no 4, 809-819 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2003. Vol. 50, no 4, 809-819 p.
Keyword [en]
camillary plates, GEM, high counting rate, portal imaging, rate gaseous detectors, preamplification structures, electron multiplier, gem, limitations, chambers, plate, liga
URN: urn:nbn:se:kth:diva-22750ISI: 000184789000014OAI: diva2:341448
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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