共查询到20条相似文献,搜索用时 15 毫秒
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Multi-gap Resistive Plate Chamber (MRPC) is a new generation of gas detector with good tim-ing and spacial resolution, whose technique is widely applied in some recent high energy (nuclear) physics experiments. In this letter, we report a long-strip two-end readout MRPC and its test beam performance. The measurements show that the long-strip performs a transmission line characteristic and the impedance is independent of the length of strip. The MRPC module we developed is presented to gain a timing resolution of~80 ps and a spacial resolution of ~6.4 mm. The possible application of the MRPC is also discussed. 相似文献
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基于多气隙电阻板室(MRPC)技术的飞行时间谱仪广泛应用于现代物理实验,并在粒子鉴别中发挥了重要作用.随着加速器能量和实验亮度的提高,对飞行时间谱仪的粒子计数率和时间分辨要求越来越高.MRPC飞行时间谱仪按技术上可以分成三代.从第一代到第三代,计数率要求越来越高( 30 kHz/cm~2),时间精度也更加严格(20 ps),相应的探测器结构和读出电子学系统呈现出不同的特性.本文总结了三代飞行时间谱仪技术的主要技术特点及主要物理实验,介绍了已经取得的应用成果,提出了该技术的未来发展方向.同时也介绍了MRPC探测器在工业及医学方面的应用. 相似文献
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研制的由28个多气隙电阻板室(MRPC)模块构成飞行时间探测系统, 从2003年以来在RHIC-STAR实验上成功运行并获得了大量的实验数据. 为了深入了解MRPC实际运行中的性能,采用质心能量200GeV的Au-Au对撞的实验数据, 对MRPC-TOF的刻度方法进行了深入研究, 主要包括: (1) 对现有的刻度方法做了进一步的改进;
(2) 对粒子入射角度等因素进行了修正; (3) STAR径迹重建的位置分辨率对MRPC时间分辨率影响. 用改进后的刻度和修正方法, 计算得到MRPC的本征时间分辨率为大约60ps, 与束流实验结果相近. 相似文献
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Muon tomography is a promising method in the detection and imaging of high Z material. In general, considering the quality of track reconstruction in imaging, a detector of good position resolution, high efficiency and large area is required. This paper presents the design and study of a prototype of position sensitive MRPC with 0.15 mm narrow gas gap and 2.54 mm strip readout. Through a cosmic-ray experiment, the performance of MRPC module is carefully observed and each channel is calibrated. Through an X ray experiment with a narrow slit, the position resolution is studied. The results show that the time resolution of the module can reach 61ps and the spatial resolution can reach 0.36 mm. 相似文献
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邵明 陈宏芳 李澄 汪晓莲 黄胜利 李洁 阮丽娟 伍健 许咨宗 汪兆民 G.Eppley W.J.Llope F.Geurts J.Schambach 《中国物理 C》2004,28(7):733-737
多气隙电阻板室(MRPC)飞行时间探测器模型从2003年2月开始在美国布鲁克海文国家实验室(BNL)的AGS束流上顺利完成了为期10周的测试(共28个MRPC模块168路读出,其中12个模块即72个读出道配置了读出电子学).实验表明工作气体的选择对MRPC的工作性能有很大影响.测量了几种不同成分的混合气体(A)90%C2H2F4+5%iso-C4H10+5%SF6、(B)95.3%C2H2F4+47%iso-C4H10及(C)100%C2H2F4下MRPC探测效率和时间分辨等特性的变化,并给出了相应条件下的流光信号几率 相似文献
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Fu-Yue Wang Yi Wang Bo Xie Dong Han Peng-Fei L& uuml Bao-Hong Guo Yuan-Jing Li 《中国物理C(英文版)》2016,40(11):116006-116006
The Compact Muon Solenoid (CMS) at LHC intends to use a high rate trapezoid MRPC for the muon system upgrade, but the size of the MRPC is limited by the dimensions of low resistivity glass. We have designed a prototype of a large MRPC in which the electrodes are developed by gluing two pieces of glass plates. Simulation of the weighting field and cosmic ray test shows that the efficiency of the glued MRPC is higher than 96% and the time resolution is better than 71 ps. 相似文献
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Six-gap resistive plate chamber (MRPC) prototypes with semiconductive glass electrodes (bulk resistivity~1010.cm) were studied for suitability in time-of-flight (TOF) applications at high rates. These studies were performed using a continuous electron beam of 800 MeV at IHEP and an X-ray machine. Time resolutions of about 100 ps and efficiencies larger than 90% were obtained for flux densities up to 28 kHz/cm2. 相似文献
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A prototype multi-gap resistive plate chamber (MRPC) with a 2×6 gap structure is developed for the upgrading of the endcap time-of-flight (ETOF) detector in the Beijing Spectrometer (BESⅢ). The prototype MRPC is tested in the E3 beam line of the Beijing Electron Positron Collider (BEPC) with secondary charged particles (π and p, etc) of 600 MeV/c. The test results show that the time resolution of the MRPC can reach 50 ps and that the detection efficiency is greater than 98%. 相似文献
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由28个多气隙电阻板室(MRPC)模块组成的探测阵列-STAR/TOFr, 在相对论重离子对撞机(RHIC)实验上获得了大量的数据. 利用质心能量62.4GeV Au+Au对撞的实验数据, 分析了MRPC探测不同带电粒子(K介子、π介子、质子等)时的输出信号与气体中的电离能损(dE/dx)之间的关系, 给出了MRPC的气体电离和雪崩放大一些新的实验结果. 为了进一步解释实验结果, 针对工作条件下MRPC输出信号的特点, 对MRPC的气体电离和雪崩过程进行Monte Carlo模拟, 深入探讨了影响MRPC输出信号幅度的原因. 相似文献
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Y. Wang M. Luo X. Wang J. Cheng Y. Li G. Zhang X. Zhang 《Indian Journal of Physics》2011,85(7):1115-1118
In this paper we try to use MRPC technology to detect γ rays and fast neutrons. Through detailed Monte Carlo simulation, we
get the γ rays and fast neutrons sensitivity of MRPC. We also studied the method to improve the neutron sensitivity of MRPC.
Thin polyethylene layer is placed on the surface of electrode glass, when neutron interact with polyethylene, proton is produced
and it can ionize working gas. Electron and ions will produce avalanche by strong electric field and charges is induced on
collect electrodes. This kind of detector has high neutron-gamma resolution capability. 相似文献
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为实现面阵相机对沿轨方向长条带区域一定重叠率的推凝视成像,设计了高分辨CMOS传感器的钟摆式搜索成像模型.通过长条带逐层区域划分和成像重叠率渐近变化构建,计算了钟摆式搜索成像参量和卫星实时推凝指向姿态,并利用多次小幅逼近的PD控制器分析了搜索成像姿态控制精度与成像像移失配量.利用高分CMOS原理样机和小卫星姿控仿真平台对P5型曲面LED靶标系统进行地面等比缩放的长条带钟摆式搜索成像仿真试验.结果表明:帧间重叠率大于85%的钟摆式搜索成像比全凝视成像区域扩大了4倍;控制周期为10 Hz时,其姿态控制精度优于0.05°,姿态稳定度优于0.003°/s,搜索成像对应的图像传递函数能够达到0.141 1. 相似文献
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《中国物理C(英文版)》2016,(5)
With the constant increase of accelerator luminosity, the rate requirements of MRPC detectors have become very important, and the aging characteristics of the detector have to be studied meticulously. An online aging test system has been set up in our lab, and in this paper the setup of the system is described and the performance stability of a high-rate MRPC studied over a long running time under a high luminosity environment.The high rate MRPC was irradiated by X-rays for 36 days and the accumulated charge density reached 0.1 C/cm~2.No obvious performance degradation was observed for the detector. 相似文献