Experimental study of Xe-Ne proportional counters for X-ray detection

Borges, F.I.G.M.; Santos, F.P.; Amaro, F. D.; Dias, T.H.V.T.; Veloso, J. F. C. A.; Conde, C.A.N.

doi:10.1109/nssmic.2004.1462248

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The Monte Carlo value for Xe in Figs. 5 and 6 is in very good agreement with typical measured values (14 to 15% [1], [7], [12]). In these circumstances, we believe that the predicted minimum in at low Xe concentration will also show up in , so that a significant improvement in is expected for a PC filled with a Xe-Ne mixture rich in Ne (Xe content below 1%), when compared with pure Xe.…”

Section: Resultssupporting

confidence: 89%

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Monte Carlo Simulation Study of the Characteristics of Xe-Ne Gas Mixtures as Detection Media in Gas Proportional Ionization Counters

Santos

Rachinhas

Dias

et al. 2007

IEEE Trans. Nucl. Sci.

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A Monte Carlo simulation has been developed to investigate the performance of Xe-Ne filled proportional ionization counters, with a special interest on the intrinsic energy resolution int as a function of the Xe-Ne mixtures composition. The Monte Carlo simulation reproduces the growth of single-electron-initiated avalanches in cylindrical geometry, and the results for int are discussed in terms of the influence of the Penning ionization on the statistical parameter characterizing the fluctuations of single-electron avalanches gain. The results for int , and , as well as for the multiplication factor , are calculated for each mixture as a function of the reduced anode voltage = ln( ), where is the voltage applied to the anode-wire and is the cathode-toanode radius ratio.

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Section: Resultssupporting

confidence: 89%

“…6 and even slightly higher than for pure Xe. We attribute these discrepancies to current unsatisfactory experimental conditions (see companion paper in this issue [12]), and further work with improved electronics and detector parameter adjustments is scheduled.…”

Section: Discussionmentioning

confidence: 99%

Monte Carlo Simulation Study of the Characteristics of Xe-Ne Gas Mixtures as Detection Media in Gas Proportional Ionization Counters

Santos

Rachinhas

Dias

et al. 2007

IEEE Trans. Nucl. Sci.

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“…To improve the characteristics of the detector, it is planned to use a thinner anode (Ø≤30 μm), as well as to use 10 B in the detector design, which will lead to the possibility of using it as a neutron detector. It may also be promising to investigate the effect of mixtures of noble gases such as Xe and Ne in attempts to reduce the anode voltage due to a process of energy transfer between the two species, which produces extra electrons [10].…”

Section: Eejp 4 (2020)mentioning

confidence: 99%

Gas-Filled Gamma-Radiation Detector Based on High-Purity Xenon

Sokolov

Pudov

Rybka

et al. 2020

EEJP

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This paper reports on the development, manufacturing and testing of proportional γ-ray detectors filled with gas mixtures based on high-purity xenon. To let the gas mixtures into the detector, a special installation was developed and manufactured, consisting of components designed to work with high-purity gases. The influence of the gas pressure, its composition (pure Xe or its mixture with H2, CH4), and the voltage at the anode on the spectrometric resolution and gas gain of the detectors was studied. The addition of H2 or CH4 to xenon is used to increase the charge carrier drift velocity. These additives also stabilize the gas mixture, i. e. decrease the probability of gas breakdown at high voltage between the detector electrodes. Gas xenon, as well as its mixtures, of research purity grade (99.9999%) have been used. Proportional γ-ray detectors based on xenon gas can operate in both counting and spectrometric modes. To study the characteristics of the detectors, we used standard sources of γ-radiation 241Am, 137Cs, 152Eu, 133Ba. The best energy resolution values to date were obtained for a detector filled with a gas mixture of Xe + 2.1% CH4 at a pressure of 2.5 bar and an anode voltage of 2500 V; they were ~ 9.5% for an energy of 40 keV and ~ 5% for 120 keV. In the manufacturing of detectors intended for radiation monitoring and identification of radioactive materials, in particular in nuclear power, complex materials science problems have been solved. To increase the thermal and radiation resistance, all elements of the detector construction are made of materials that are weakly activated by ionizing radiation. In addition, the design of the detectors is completely free of glass elements and organic components. The detectors are designed to monitor technological processes and to work as part of radiation monitoring systems, including those at nuclear power plants.

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“…The gas gain, M, was obtained by using the following relation: (1) where C is the capacitance of the charge-sensitive amplifier feedback capacitor, V is the test pulse amplitude, w is the average secondary ionization energy (values for different gas mixtures were taken from, [18]) e is the electron charge, E is the X-ray energy, m is the centroid obtained from the MCA and m o is the centroid of the test pulse in the MCA, [19].…”

Section: A Single Gem Gain Measurementsmentioning

confidence: 99%

Gas Gain Measurements From a Negative Ion TPC X-ray Polarimeter

Prieskorn

Hill

Kaaret

et al. 2011

IEEE Trans. Nucl. Sci.

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Abstract-Gas-based time projection chambers (TPCs) have been shown to be highly sensitive X-ray polarimeters having excellent quantum efficiency while at the same time achieving large modulation factors. To observe polarization of the prompt X-ray emission of a Gamma-ray burst (GRB), a large area detector is needed. Diffusion of the electron cloud in a standard TPC could be prohibitive to measuring good modulation when the drift distance is large. Therefore, we propose using a negative ion TPC (NITPC) with Nitromethane (CH 3 NO 2 ) as the electron capture agent. The diffusion of negative ions is reduced over that of electrons due to the thermal coupling of the negative ions to the surrounding gas. This allows for larger area detectors as the drift distance can be increased without degrading polarimeter modulation. Negative ions also travel ~200 times slower than electrons, allowing the readout electronics to operate slower, resulting in a reduction of instrument power.To optimize the NITPC design, we have measured gas gain with SciEnergy gas electron multipliers (GEMs) in single and double GEM configurations. Each setup was tested with different gas combinations, concentrations and pressures: P10 700 Torr, Ne+CO 2 700 Torr at varying concentrations of CO 2 and Ne+CO 2 +CH 3 NO 2 700 Torr. We report gain as a function of total voltage, measured from top to bottom of the GEM stack, and as a function of drift field strength for the gas concentrations listed above. Examples of photoelectron tracks at 5.9 keV are also presented.Index Terms-X-ray polarimetry, negative ion time projection chamber, x-ray detectors.

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Experimental study of Xe-Ne proportional counters for X-ray detection

Cited by 6 publications

References 12 publications

Monte Carlo Simulation Study of the Characteristics of Xe-Ne Gas Mixtures as Detection Media in Gas Proportional Ionization Counters

Monte Carlo Simulation Study of the Characteristics of Xe-Ne Gas Mixtures as Detection Media in Gas Proportional Ionization Counters

Gas-Filled Gamma-Radiation Detector Based on High-Purity Xenon

Gas Gain Measurements From a Negative Ion TPC X-ray Polarimeter

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