Dependence of the performance of CsI-covered microstrip plate VUV photosensors on geometry: experimental results

Freitas, D.S.A.P.; Veloso, J.F.C.A.; Santos, J.M.F. dos; Conde, C.A.N.

doi:10.1109/tns.2002.801698

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…For a standard single cathode MSP with similar dimensions (10 anode width, 160 cathode width, 55 anode-tocathode gap) the energy resolution obtained [4] was not as good: 12.7%.…”

Section: Discussionmentioning

confidence: 92%

“…S INGLE Cathode Microstrip Plates (MSP) covered with a CsI film have been used for some time [1] as VUV photosensors for xenon filled Gas Proportional Scintillation Counters (GPSC) yielding energy resolutions of 12.7% for 5.9 keV X-rays [2], [3] for equivalent geometry devices as the one presented herein, although 11.4% resolution has been achieved with optimised geometry devices [4], which is a resolution not as good as that for GPSCs instrumented with photomultipliers (8.0%), but better than that for standard Proportional Counters (14%).…”

Section: Introductionmentioning

confidence: 99%

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Dual-Cathode CsI Covered Microstrip Plate as VUV High Efficiency Photosensor

Freitas

Silva

Mendes

et al. 2008

IEEE Trans. Nucl. Sci.

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A Gas Proportional Scintillation Counter based on a dual-cathode Microstrip Plate covered with a CsI film is described. This new dual-cathode technique has the advantage of increasing the VUV sensitive area of the Microstrip Plate. A detailed description of the technique is presented together with a discussion of the performance. The results obtained for a xenon filled Gas Proportional Scintillation Counter show an improvement of the energy resolution for 5.9 keV X-rays from 12.7%, for a single cathode device, to 11.1% for the dual-cathode device.

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“…For a standard single cathode MSP with similar dimensions (10 anode width, 160 cathode width, 55 anode-tocathode gap) the energy resolution obtained [4] was not as good: 12.7%.…”

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Dual-Cathode CsI Covered Microstrip Plate as VUV High Efficiency Photosensor

Freitas

Silva

Mendes

et al. 2008

IEEE Trans. Nucl. Sci.

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“…Hybrid detectors with MSP designs presenting different cathode-to-anode gap and cathode strip widths have been studied [7]. It was shown that optical positive feedback is more intense for larger cathode strips while a dependence of optical feedback on the anode-to-cathode gap is not noticeable.…”

Section: Detector Operational Characteristicsmentioning

confidence: 99%

The gas proportional scintillation counter/microstrip gas chamber hybrid detector

Freitas

Veloso

Monteiro

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

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The gas proportional scintillation counter/microstrip gas chamber (GPSC/MSGC) hybrid detector for X-ray spectrometry is described. The detector uses a CsI-coated microstrip plate placed in direct contact with the gas-filling as the photosensor readout for the GPSC scintillation substituting for the photomultiplier tube (PMT). Usable photosensor maximum gain is limited by optical positive feedback due to the additional scintillation produced in the electron avalanche process at the MSP anodes, in the absence of quenching. A low-photoelectron collection efficiency is achieved in the gas atmosphere, resulting in a scintillation conversion efficiency that is about a factor of 5 lower than that achieved with PMT-based GPSCs. However, energy resolutions of 11% for 5.9 keV X-rays are achieved with this detector. r

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“…Since GPSCs achieve the amplification of the primary electron signal, through the production of secondary scintillation by the gas atoms, a photosensor is needed to detect the scintillation light. The most commonly used photosensor, and the one that still originates the best GPSC performance, is the photomultiplier tube, in spite of the continued effort carried out in the last decade to replace the photomultiplier with a less bulky photosensor, namely using photodiodes [6] and CsI and KBr covered microstrip plates [7,8]. Concerning the choice of gas filling, Xe is the most commonly used one, since it presents high-detection efficiency and a very good scintillation yield.…”

Section: Introductionmentioning

confidence: 99%

F-16 Performance of a Room Temperature Gas Proportional Scintillation Counter in X-ray Analysis of Metallic Alloys Excited with Alpha Particles

et al. 2007

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A gas proportional scintillation counter with a large detection area (≈ 1000 mm 2) is described. The curved grid technique was used for solid angle compensation and the photosensor is a photomultiplier tube with a 50 mm diameter quartz window. For an energy range between 2.5 and 25 keV it can work at counting rates up to 20,000 events/s, presenting for 5.9 keV X-rays an energy resolution of 7.8% for a 1 mm collimated beam that degrades to 9% when the full detector window is used. Results for its performance in the analysis of some common metallic alloys excited with alpha particles are presented.

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Dependence of the performance of CsI-covered microstrip plate VUV photosensors on geometry: experimental results

Cited by 5 publications

References 13 publications

Dual-Cathode CsI Covered Microstrip Plate as VUV High Efficiency Photosensor

Dual-Cathode CsI Covered Microstrip Plate as VUV High Efficiency Photosensor

The gas proportional scintillation counter/microstrip gas chamber hybrid detector

F-16 Performance of a Room Temperature Gas Proportional Scintillation Counter in X-ray Analysis of Metallic Alloys Excited with Alpha Particles

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