Operating range of a gas electron multiplier for portal imaging
2001 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 471, no 02-jan, 151-155 p.Article in journal (Refereed) Published
At the Karolinska Institute in Stockholm, Sweden a new detector for portal imaging is under development, which could greatly improve the alignment of the radiation beam with respect to the tumor during radiation treatment. The detector is based on solid converters combined with gas electron multipliers (GEMs) as an amplification structure. The detector has a large area and will be operated in a very high rate environment in the presence of heavy ionizing particles. As was discovered recently high rates and alpha particles could cause discharges in GEM and discharge propagation from GEM to GEM and to the readout electronics. Since reliability is one of the main requirements for the portal imaging device, we performed systematic studies to find a safe operating range of the device, free from typical high rate problems, such as discharges.
Place, publisher, year, edition, pages
2001. Vol. 471, no 02-jan, 151-155 p.
portal imaging device, gas electron multiplier, discharge study, detectors, gem
IdentifiersURN: urn:nbn:se:kth:diva-20965ISI: 000171206500029OAI: oai:DiVA.org:kth-20965DiVA: diva2:339662
QC 201005252010-08-102010-08-10Bibliographically approved