High-pressure operation of a xenon-GPSC/MSGC hybrid detector for hard X-ray spectrometry

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Coelho, LCC (Author) Other; Veloso, JFCA (Author) Other; Covita, DS (Author) Other; Requicha Ferreira, LF (Author) Other; dos Santos, JMF (Author) Other

Journal

Title: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

Vol. 569

Pages: 796-802

ISSN: 0168-9002

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 5 Citations

Other information

Authenticus ID: P-004-FF5

DOI: 10.1016/j.nima.2006.09.061

Abstract (EN): The performance of a high-pressure xenon gas proportional scintillation counter/microstrip gas chamber (GPSC/MSGC) hybrid detector has been investigated for filling pressures from 1 up to 10 bar, for 22-, 30- and 60-keV photons. GPSC/MSGC hybrid detectors are based on a xenon-GPSC instrumented with a CsI-coated microstrip plate photosensor placed directly within the xenon envelope, as a substitute for the photomultiplier tube. This design avoids the constraints due to the use of a quartz scintillation window for GPSC-photosensor coupling, which absorbs a significant amount of scintillation and is a drawback for applications where large detection areas and high filling pressures are needed. The lowest energy resolutions are achieved for 2 bar (5.5% and 3.4%, FWHM, for 22- and 60-keV photons, respectively). Increasing the pressure to the 5-6 bar range, competitive energy resolutions of 7 % and 4.5 % are still achieved for 22- and 60-keV photons, respectively. This detector could be a compelling alternative in applications where compactness, large detection area, insensitivity to strong magnetic fields, room temperature operation, large signal-to-noise ratio and good energy resolution are important requirements.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7