共查询到18条相似文献,搜索用时 161 毫秒
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RIBLL1终端实验装置 总被引:1,自引:0,他引:1
描述了一套HIRFL的放射性核次级束流引起反应测量的实验装置,它由RIB鉴别、测量系统、次级靶控制系统和次级反应产物鉴别、测量系统组成.高增益分组延迟线读出、重心定位PPAC,横向场IC,椭球面镜聚焦、PMT读出、闪烁薄膜时间拾取器,双叠层纵向场阳极分条读出IC,PMT矩阵读出x—y位置灵敏Phoswich闪烁探测器,康普顿抑制HpGeγ探测器等单元是这套装置的基本部件.目前,该装置已安装在兰州重离子加速器RIBLL1终端.性能测试和实验研究正在进行. 相似文献
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为研发能够满足北京同步辐射(BSRF)实验要求的二维探测器,研制了基于读出条读出的二维位置灵敏X射线气体电子倍增器(GEM).实验过程中通过改进读出条的周期,并基于中科院高能所实验物理中心电子学组研制的多路电荷放大器系统与VME存储-ADC系统,对软X射线源的位置分辨率进行了精密测量且得到了优异的二维位置分辨:X方向约为84μm,Y方向约为75μm.研究了三级GEM压差之和对位置分辨的影响,并测试了探测器的位置准确度与线性.对基于阳极读出的GEM用于模拟读出测试系统得到了一定的理论认识,侧重研究了GEM探测器基于模拟读出的系统特性,给出了相关的分析与讨论. 相似文献
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中国散裂中子源将建设一台基于~3He气体的二维多丝室,作为多功能反射谱仪束线的中子探测器.基于已有的研究,为优化选择二维多丝室探测器的丝结构,本文研究了三种不同的丝结构,并采用重心读出方法和数字读出方法进行了探测器的性能测量,得到了满足多功能反射谱仪探测器需求的读出方法.实验结果表明:对同种丝结构的二维多丝室探测器,重心读出方法的位置分辨和成像性能都好于数字读出方法;基于重心法读出的多丝室探测器位置分辨率可以达到约160μm,基于数字读出方法的多丝室探测器位置分辨率可以达到约400μm.优化设计的丝结构为:基于重心读出法的阳极丝间距1.5 mm、读出通道间距4 mm,基于数字读出法的阳极丝间距1.5 mm、读出通道间距2 mm.优化设计的丝结构均能满足谱仪的位置分辨要求. 相似文献
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Multi-gap Resistive Plate Chamber (MRPC) is a new generation of gas detector with good timing 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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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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The present article describes a detailed neutron simulation study in the energy range 10~(-10) MeV to 1.0 GeV for two different RPC configurations.The simulation studies were taken by using the GEANT4 MC code.Aluminum was utilized on the GND and readout strips for the (a) Bakelite-based and (b) glass-based RPCs.For the former type of RPC setup the neutron sensitivity for the isotropic source was S_n=2.702×10~(-2) at E_n=1.0 GeV, while for the latter type of RPC, the neutron sensitivity for the same source was evaluated as S_n=4.049×10~(-2) at E_n=1.0 geV.These results were further compared with the previous RPC configuration in which copper was used for ground and pickup pads.Additionally A1 was employed at (GND+strips) of the phosphate glass RPC setup and compared with the copper-based phosphate glass RPC.Good agreement with sensitivity values was obtained with the current and previous simulation results. 相似文献
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设计了一种全固态、低阻抗、卷绕型零厚度带状脉冲形成线。通过保角变换将其特性阻抗的计算转化为对非对称型平板带状线特性阻抗的计算,并得出了卷绕型带状线特性阻抗的计算方法。数值模拟结果表明:带状线不对称将使带状线的特性阻抗减小,但当内导体宽与上下外导体间距之比很大时,可忽略不对称带来的影响。给出了不对称度(内导体分别到上下外导体的距离之比)对特性阻抗的影响关系,且不对称度小于3.1时,特性阻抗的变化小于5%,在实际工程设计中可忽略不对称带来的影响。 相似文献
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An electrical model for multi-strip resistive plate chamber (RPC) is presented,and a comparison between simulation results and test data is carried on.Based on the model,the influences of the RPC's design parameters on the readout are studied with PSpice simulation.Cross-talk (CT) phenomenon is observed and the relative amplitudes of the CT are studied for different design parameters. 相似文献
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Mingming Jiang Yunyi Wang 《International Journal of Infrared and Millimeter Waves》1994,15(12):2051-2060
Dispersions, attenuation and characteristic impedance of shielded conductor-backed coplanar waveguide(CBCPW) and shielded three-layer coplanar waveguide (CPW) with finite conductor thickness as well as their superconducting applications are calculated. The method of lines(MoL) is employed to analyze these coplanar waveguides. The analysis is validated by a comparison of the calculated results with those published previously. Effects of finite width of grounded strip for a CPW are considered. Extensive investigation of the numerical convergence for calculation of the characteristic impedance is also described. 相似文献
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Louis-Pierre Arguin 《Journal of statistical physics》2007,126(4-5):951-976
We study the Parisi functional, appearing in the Parisi formula for the pressure of the SK model, as a functional on Ruelle's
Probability Cascades (RPC). Computation techniques for the RPC formulation of the functional are developed. They are used
to derive continuity and monotonicity properties of the functional retrieving a theorem of Guerra. We also detail the connection
between the Aizenman-Sims-Starr variational principle and the Parisi formula. As a final application of the techniques, we
rederive the Almeida-Thouless line in the spirit of Toninelli but relying on the RPC structure. 相似文献