The performance of the GPSC/MSGC hybrid detector with argon-xenon gas mixtures

Monteiro, C.M.B.; Veloso, J.F.C.A.; Santos, J. M. F. dos; Conde, C.A.N.

doi:10.1109/nssmic.2001.1008459

Cited by 3 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values compare favorably to those of 50% to 40%, achieved with argon-xenon mixtures (Fig. 5 of [10]), confirming the higher photoelectron transmission efficiency expected for neon-xenon mixtures compared to argon-xenon mixtures.…”

Section: Resultssupporting

confidence: 73%

“…However, for the hybrid detector, the detector gain tends to depart from this behavior at higher values, and tends to saturate for pure xenon and high xenon content mixtures. This is due to the role of the electric field intensity, at the CsI surface, in the extraction of the produced photoelectrons, as discussed in [1], [9], and [10].…”

Section: Resultsmentioning

confidence: 99%

“…1, being this the same detector as used in [1], [9], [10]. It features a 4-cm deep absorption/drift region and a 1-cm deep scintillation region separated by a mesh grid, G1 (80-m diameter stainless-steel wire with 900-m spacing).…”

Section: Descriptionmentioning

confidence: 99%

“…Argon and argon-xenon hybrid detectors have been investigated [9], [10] and increased photoelectron collection efficiency in argon-based mixtures allowed a 50% increase in the detector gain, compared to that achieved with pure xenon [10].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The performance of the GPSC/MSGC hybrid detector with neon-xenon gas mixtures

Fernandes

Freitas

Trindade

et al. 2004

IEEE Trans. Nucl. Sci.

Self Cite

View full text Add to dashboard Cite

The performance for X-ray spectrometry of neon-xenon gas proportional scintillation counters using a CsI-coated microstrip plate in direct contact with the scintillation gas as a VUV photosensor is investigated for different neon-xenon mixtures. At best operation conditions, the detector gain can reach values about 50% higher than those achieved with pure xenon filling. The highest gains and the best energy resolutions are achieved for xenon contents around 40%. However, the achieved energy resolutions are similar to those achieved with pure xenon. As in pure xenon and argon-xenon mixture gas fillings, the detector performance is limited by optical positive feedback resulting from additional scintillation produced in the electron avalanche processes around the MSP anodes. The best energy resolutions are achieved for positive feedback gains in the range of 1.1 to 1.2. The performance achieved with neon-xenon mixtures is inferior to that achieved with argon-xenon mixtures.Index Terms-CsI-photocathode, gas scintillation counter, microstrip gas chamber (MSGC), X-ray.

show abstract

Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The performance of the GPSC/MSGC hybrid detector with neon-xenon gas mixtures

Fernandes

Freitas

Trindade

et al. 2004

IEEE Trans. Nucl. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For all the above reasons, an account is given here on an experimental investigation of argon-xenon non-metastable Penning mixtures [12], [13]. However, noble gases scintillate, an effect that can be a drawback in our purposes as scintillation photons might trigger a spurious avalanche.…”

mentioning

confidence: 99%

Quenched and non-quenched Ar-Xe Penning mixtures as detection media for a Gridded-Microstrip Gas Chamber X-ray detector

Carita

Conde

Santos

2008

2008 IEEE Nuclear Science Symposium Conference Record

View full text Add to dashboard Cite

N02·143for the PI 0 mixture) and gas gain as compared to those obtained with a standard microstrip plate [3].Abstract -The performance of quenched and non-quenched argon-xenon Penning mixtures in a Gridded-Microstrip Gas Chamber is studied for 5.9keV X-rays. The best energy resolution obtained was 12.7% for the 90 0 /oAr-l0 0 /oXe mixtures. Charge multiplication gains one order of magnitude higher than in pure xenon were obtained for 95 % Ar-5 % Xe. With the addition of the quenching agent (methane), although the gas gain at the same anode voltage decreases, a better energy resolution of 12.3% is achieved for the 85.5 % Ar-5 % Xe-9.5 % CH4 mixture. CathodeGrid Anode GridIndex Terms -microstrip plate, X-ray gaseous detector, Penning mixtures, argon-xenon and PI0-xenon gas mixtures. Fig. 1 Schematic view of the dual anode microstrip plate with the anode surrounded by close-lying grid and cathode further apart.Bearing in mind the optimization of the performance of the structure developed, in the present work further investigation is described namely in the field of detection media. In charge multiplication based detectors such as the G-MSGC the lower limit of the experimental energy resolution, Le. the intrinsic energy resolution R, is limited by the statistical fluctuations in the number of primary electrons (characterized by the so-called Fano factor, F), and also in the charge multiplication process (characterized by the parameter j), and is given by [6] where w is the mean energy required to form a primary electron in the gas and Ex is the energy of the incident x-rays.By virtue of their low w values, zero electron affinities and lack of vibrational and rotational energy loss mechanisms, the noble gases are common fillings of gas detectors for X-rays. It has also been demonstrated [7]- [9], that by adding a small amount of a heavier noble gas (less than approximately 5% for metastable Penning mixtures and 8-10% for non-metastable ones) with lowest ionization potential than some of the excited states of the lighter component, energy transfer between the two components can take place and extra electrons will be released. From this process, known as Penning effect, parameters wand F decrease [9] and as a result, the intrinsic limit of the energy resolution will improve and the ionization efficiency becomes higher than for pure components at relative low voltages. It has also been shown that by using a lighter noble gas as a Penning partner, these mixtures increase the absorption depth of X-rays, reducing the spectra distortion towards the low energy regions [10], [11] and consequently are

show abstract

Quenched and Non-Quenched Ar-Xe Penning Mixtures as Detection Media for a Gridded-Microstrip Gas Chamber X-Ray Detector

Carita

Conde

Santos

2009

IEEE Trans. Nucl. Sci.

View full text Add to dashboard Cite

The performance of quenched and non-quenched argon-xenon Penning mixtures in a Gridded-Microstrip Gas Chamber is studied for 5.9 keV X-rays. The best energy resolution obtained was 12.5% for the 95%Ar-5%Xe mixture. Charge multiplication gains one order of magnitude higher than in pure xenon were obtained for 95%Ar-5%Xe. With the addition of the quenching agent (methane), although the gas gain at the same anode voltage decreases, a better energy resolution of 12.3% is achieved for the 85.5%Ar-5%Xe-9.5%CH4 mixture.Index Terms-Argon-xenon and P10-xenon gas mixtures, microstrip plate, Penning mixtures, x-ray gaseous detector.

show abstract

The performance of the GPSC/MSGC hybrid detector with argon-xenon gas mixtures

Cited by 3 publications

References 15 publications

The performance of the GPSC/MSGC hybrid detector with neon-xenon gas mixtures

The performance of the GPSC/MSGC hybrid detector with neon-xenon gas mixtures

Quenched and non-quenched Ar-Xe Penning mixtures as detection media for a Gridded-Microstrip Gas Chamber X-ray detector

Quenched and Non-Quenched Ar-Xe Penning Mixtures as Detection Media for a Gridded-Microstrip Gas Chamber X-Ray Detector

Contact Info

Product

Resources

About