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The gas magnification of multi-gap resistive plate chamber (MRPC) is very difficult to be measured using the present instruments thoroughly in the world. The gas magnifications about ~107 were obtained in the various operation-high-voltages of multi-gap resistive plate chamber (MRPC) by means of Monte-Carlo simulation and the presented experiment method. 相似文献
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CHEN Huangshan WANG Yi DING Weicheng QIU Xuezhong WANG Jingbo ZHU Xianglei CHENG Jianping LI Yuanjing 《核技术(英文版)》2011,(6):330-333
Long-strip multi-gap resistive plate chamber(LMRPC) were built with(Module 1) or without(Module 2) adhesive tapes and silicones.Their performances were investigated by working gas mixtures of different gradient contents(Test 1:94%freon,5%iso-butane and 1%SF6;Test 2:90%freon,5%iso-butane and 5%SF6).Both the modules achieved 100%efficiency,with time resolutions of 75 and 70 ps.Comparatively,the Module 1 works with a lower applied HV at the higher noise level,and time resolution was not influenced greatly by the adhesive tapes and silicones. 相似文献
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研究MRPC探测器的抗辐照性能,对于RHIC-STAR实验MRPC-TOF的长期稳定运行具有重要意义.设计制作了3.7GBq 60Co γ放射源MRPC辐照性能试验系统,并在两种不同剂量率下进行了辐照实验,得到了MRPC辐照前后的性能变化情况. 相似文献
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The aging test of multigap resistive chamber (MRPC) was carried out under conditions of irradiation from a 137Cs γ source facility. The total charge induced at the anode or at the cathode of the MRPC module was about 29 mC. The gamma dose rate was 10-2 Gy.h-1, and the total accumulative radiation dose was 4.3 Gy. After irradiation,there was an obvious degradation in the properties of the MRPC module. 相似文献
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1 Introduction Resistive plate chamber (RPC) was developed in1981.[1] It exploits gas amplification in a uniformelectric field between two resistive parallel plates.During the past 20 years, to understand the detectorphysics and to improve its efficiency, rate capabilityas well as ageing effect, investigations and develop-ments are lively progressing.[2,3] RPC has several at-tractive features: large pulse, good time and moderatespatical resolution, mechanical simplicity and robust-nes… 相似文献
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主要研究了MRPC单层气隙工作的物理机制.MRPC工作的物理过程可分为初始电离和电子雪崩两个基本点阶段,依据气体导电理论和相关专业软件,可模拟计算出MRPC单层气隙中的感应电流、本征探测效率与时间分辨率等物理参数.将计算结果与实验结果相比,表明在MRPC中,空间电荷效应明显,电子雪崩甚至达到饱和. 相似文献
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1 Introduction MRPC is a new type of gas detector [1, 2] devel- oped in the last few decades. It has been proposed to be a substitute for the Time of Flight (TOF) detector used in conventional technology in high-energy nu- clear and particle experiments because of its properties of excellent time resolution, high efficiency, simple structure, insensitivity to magnets, and low energy dissipation. The MRPC technology has been adopted for TOF by the STAR group at Relativistic Heavy Ion C… 相似文献
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主要描述了在流光工作模式下,用C2H2F4替换CF3Br气体后,阻性板室(RPC)探测效率仍然达到95%左右,时间分辨的FWHM为2ns,是一种很有前途的环保型工作气体。 相似文献