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https://hdl.handle.net/10316/4375
Título: | Xenon GPSC high-pressure operation with large-area avalanche photodiode readout | Autor: | Coelho, L. C. C. Lopes, J. A. M. Covita, D. S. Conceição, A. S. Santos, J. M. F. dos |
Palavras-chave: | X-ray detection; Gas proportional counter | Data: | 2007 | Citação: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 575:3 (2007) 444-448 | Resumo: | The performance of a xenon high-pressure gas proportional scintillation counter (GPSC) instrumented with a large area avalanche photodiode (LAAPD) as the VUV-photosensor has been investigated for filling pressures from 1 up to 10 bar, for 22- and 60-keV photons. The LAAPD photosensor is placed directly within the xenon envelope, as a substitute for the photomultiplier tube, avoiding the constraints of 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 pressures around 5 bar (4.5% and 3.0% full width at half-maximum (FWHM), for 22- and 60-keV photons, respectively). Increasing the pressure to the 8 bar range, competitive energy resolutions of 5.0% and 3.6% 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. | URI: | https://hdl.handle.net/10316/4375 | DOI: | 10.1016/j.nima.2007.02.111 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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file9bd3beff04a14d628881201c1da02af9.pdf | 290.54 kB | Adobe PDF | Ver/Abrir |
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