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Images of triple gas electron multiplier with pixel-pads 被引量:4
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作者 董静 胡碧涛 +1 位作者 陈元柏 谢一冈 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第10期4229-4233,共5页
Testing of a triple gas electron multiplier (GEM) with pixel-pads is described. Images by scanning and suspending radioactive sources were obtained by using 96 channels digital data acquisition (DAQ) system which ... Testing of a triple gas electron multiplier (GEM) with pixel-pads is described. Images by scanning and suspending radioactive sources were obtained by using 96 channels digital data acquisition (DAQ) system which was composed of 96 8×8 mm2 pads and associated electronics channels. 展开更多
关键词 gas electron multiplier IMAGES digital data acquisition system
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Recent Achievement of Gas Electron Multiplier
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作者 WANGLin XIAYi-ben WANGLin-jun ZHANGMing-long YANGYing ZHANGWei-li RUANJian-feng 《Semiconductor Photonics and Technology》 CAS 2004年第1期62-67,共6页
Gas electron multiplier (GEM) as a novel gas detector,due to it’s simple structure,high performance,well compatibility etc.,is widely used in high-energy physics,nuclear physics and other fields.In this review,the pr... Gas electron multiplier (GEM) as a novel gas detector,due to it’s simple structure,high performance,well compatibility etc.,is widely used in high-energy physics,nuclear physics and other fields.In this review,the principle,recent achievements,developments and applications of GEM are mainly described. 展开更多
关键词 gas electron multiplier gas detector Micro-strip gas chamber
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Experimental study on the performance of a single-THGEM gas detector
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作者 安正华 吕军光 +14 位作者 王志刚 蔡啸 董明义 方建 胡涛 吕绮雯 宁飞鹏 孙丽君 孙希磊 王晓东 薛镇 俞伯祥 章爱武 周莉 郑阳恒 《Chinese Physics C》 SCIE CAS CSCD 2010年第1期83-87,共5页
A kind of thick GEM-like gaseous electron multiplier (THGEM), which is mechanically an expansion of the GEM with its various dimensions being enlarged, is studied. The leak current of THGEM plates is measured. The e... A kind of thick GEM-like gaseous electron multiplier (THGEM), which is mechanically an expansion of the GEM with its various dimensions being enlarged, is studied. The leak current of THGEM plates is measured. The effective gain and energy resolution of a single THGEM are studied with a source of 55Fe, and the effective gain of the single THGEM versus the electric field strength in the induction region is investigated. The results show that the leak current of THGEM plates is less than 200 pA. In an atmospheric-pressure standard gas mixture, 8×103 effective gain and about 32% energy resolution can be reached for the single-THGEM detector. 展开更多
关键词 gas electron multipliers hole multiplier effective gain energy resolution
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Monte Carlo simulation of GEM-based for 14 MeV neutron detector 被引量:3
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作者 WANG XiaoDong ZHANG YuLian +1 位作者 ZHANG ChunHui HU BiTao 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第9期1740-1744,共5页
A new concept of neutron detector based on Gas Electron Multiplier(GEM) technology is presented in this paper,in which a novel multi-layer high density polyethylene(HDPE) as neutron-to-proton converter is proposed and... A new concept of neutron detector based on Gas Electron Multiplier(GEM) technology is presented in this paper,in which a novel multi-layer high density polyethylene(HDPE) as neutron-to-proton converter is proposed and studied with Geant4 toolkit for fast 14 MeV neutron.Our preliminary results show that the detection efficiency of the detector with 400 converter units is higher than 2.3% and reconstruction accuracy of the incident neutron position is higher than 2.6%. 展开更多
关键词 gas electron multiplier 14 MeV neutron detection efficiency position reconstruction
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Study on the novel neutron-to-proton convertor for improving the detection efficiency of a triple GEM based fast neutron detector 被引量:1
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作者 王晓冬 杨贺润 +6 位作者 任忠国 张俊伟 杨磊 张春晖 哈日巴拉 安旅行 胡碧涛 《Chinese Physics C》 SCIE CAS CSCD 2015年第2期39-43,共5页
A high-efficiency fast neutron detector prototype based on a triple Gas Electron Multiplier(GEM) detector, which, coupled with a novel multi-layered high-density polyethylene(HDPE) as a neutron-to-proton converter... A high-efficiency fast neutron detector prototype based on a triple Gas Electron Multiplier(GEM) detector, which, coupled with a novel multi-layered high-density polyethylene(HDPE) as a neutron-to-proton converter for improving the neutron detection efficiency, is introduced and tested with the Am-Be neutron source in the Institute of Modern Physics(IMP) at Lanzhou in the present work. First, the developed triple GEM detector is tested by measuring its effective gain and energy resolution with55 Fe X-ray source to ensure that it has a good performance.The effective gain and obtained energy resolution is 5.0×104and around 19.2%, respectively. Secondly, the novel multi-layered HDPE converter is coupled with the cathode of the triple GEM detector making it a high-efficiency fast neutron detector. Its effective neutron response is four times higher than that of the traditional single-layered conversion technique when the converter layer number is 38. 展开更多
关键词 gas Electron multiplier deposited energy Am-Be neutron source neutron detection efficiency fast neutron detector
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Design and construction of a TPC prototype based on GEM detector readout 被引量:1
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作者 李玉兰 曹良俊 +6 位作者 祁辉荣 李金 康克军 李元景 来永芳 高原宁 杨振伟 《Chinese Physics C》 SCIE CAS CSCD 北大核心 2008年第1期52-55,共4页
A time projection chamber (TPC) readout by gas electron multipliers (GEM) detector is a very promising candidate for the central tracking system of ILC (International Linear Collider). A prototype is designed an... A time projection chamber (TPC) readout by gas electron multipliers (GEM) detector is a very promising candidate for the central tracking system of ILC (International Linear Collider). A prototype is designed and set up in our lab and introduced here. The tests during and after the assembly prove that the prototype TPC has been constructed successfully. It is ready for further study. 展开更多
关键词 time projection chamber gas electron multiplier endcap readout
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Discriminating cosmic muons and X-rays based on rise time using a GEM detector
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作者 吴会寅 赵圣鹰 +6 位作者 王晓冬 章先鸣 祁辉荣 张伟 吴柯岩 胡碧涛 张毅 《Chinese Physics C》 SCIE CAS CSCD 2016年第8期72-75,共4页
Gas electron multiplier (GEM) detectors have been used in cosmic muon scattering tomography and neutron imaging over the last decade. In this work, a triple GEM device with an effective readout area of 10 cm × ... Gas electron multiplier (GEM) detectors have been used in cosmic muon scattering tomography and neutron imaging over the last decade. In this work, a triple GEM device with an effective readout area of 10 cm × 10 cm is developed, and a method of discriminating between cosmic muons and X-rays based on rise time is tested. The energy resolution of the GEM detector is tested by 55Fe ray source to prove the GEM detector has a good performance. Analysis of the complete signal-cycles allows us to get the rise time and pulse heights. The experiment result indicates that cosmic muons and X-rays can be discriminated with an appropriate rise time threshold. 展开更多
关键词 gas electron multiplier cosmic muon X-RAY rising time DISCRIMINATION
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An X-ray imaging device based on a GEM detector with delay-line readout
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作者 周意 李澄 +1 位作者 孙勇杰 邵明 《Chinese Physics C》 SCIE CAS CSCD 2010年第1期78-82,共5页
An X-ray imaging device based on a triple-GEM (Gas Electron Multiplier) detector, a fast delay-line circuit with 700 MHz cut-off frequency and two dimensional readout strips with 150 μm width on the top and 250 μm... An X-ray imaging device based on a triple-GEM (Gas Electron Multiplier) detector, a fast delay-line circuit with 700 MHz cut-off frequency and two dimensional readout strips with 150 μm width on the top and 250 μm width on the bottom, is designed and tested. The localization information is derived from the propagation time of the induced signals on the readout strips. This device has a good spatial resolution of 150 μm and works stably at an intensity of 105 Hz/mm2 with 8 keV X-rays. 展开更多
关键词 delay-line readout gas electron multiplier (GEM) X-ray imaging
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Spatial resolution optimization in a THGEM-based UV photon detector
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作者 P.Ray G.Baishali +1 位作者 V.Radhakrishna K.Rajanna 《Radiation Detection Technology and Methods》 2018年第2期60-66,共7页
Introduction THick Gas Electron Multiplier(THGEM)is considered in many UV photon detector applications.It has the capability of detecting single photon and imaging with high sensitivity.Operating parameters such as ch... Introduction THick Gas Electron Multiplier(THGEM)is considered in many UV photon detector applications.It has the capability of detecting single photon and imaging with high sensitivity.Operating parameters such as choice of gas mixture,pressure,drift field,drift gap,multiplication voltage,induction field and induction gap play an important role in deciding the spatial resolution of the detector.Detailed simulation study enables to optimize the above-mentioned parameters for a given THGEM-based imaging detector and hence to achieve improved performance for the same.Materials and methods Simulation,using ANSYS and Garfield++,starts with the release of primary electrons at random coordinates on the photocathode plane.They are tracked as they pass through the drift gap and THGEM hole till the electron cloud reaches anode plane.Distribution of electron cloud on the anode plane along X and Y axis is plotted in histogram and fitted with Gaussian function to determine spatial resolution.Ar/CO_(2)(70:30)mixture,which shows higher ETE and lower transverse diffusion,is chosen for this simulation study.Conclusion Transverse diffusion has a major impact on both ETE and the spatial resolution.Lower transverse diffusion coefficient is always desired for having better resolution as well as for ETE.It is found from the simulation study that higher gas pressure,lower drift field and induction field,smaller drift and induction gap can provide optimum detection efficiency with the best spatial resolution.The simulation method proposed here can also be extended to X-ray imaging detectors. 展开更多
关键词 Thick gas electron multiplier(THGEM) UV photon detectors Electron transfer efficiency Spatial resolution simulation Garfield++
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