大亚湾RPC探测器电子学读出插件原型机设计

介绍了大亚湾(Daya Bay)反应堆中微子振荡实验RPC探测器电子学中基于FPGA的读出插件原型机(ROM-USB)的设计,其中包括该原型机的设计构想、硬件结构以及FPGA内部逻辑的实现.现在ROM-USB已经在RPC探测器及其前端电子学板(FEC)的复制过程中得到应用.     

大亚湾中微子实验RPC电子学读出系统时钟分配插件的设计

介绍了大亚湾( Daya Bay)反应堆中微子振荡实验RPC探测器电子学系统中时钟分配插件的设计,包括了其硬件结构的设计和插件中FPGA芯片固件逻辑的设计.在制作和调试完成之后进行了相关功能和稳定性的测试.     

大亚湾实验RPC探测器信号读出前端板的高精度甄别阈的设计

介绍了大亚湾中微子振荡实验中阻性板探测器RPC(Resistive Plate Chamber)读出电子学前端板FEC(Front-End-Card)上高精度甄别阈电路的设计原理和相关测试。该电路具有高精度、低的甄别阈值设置能力、好的一致性保障等特点。在介绍该电路设计原理的同时,也给出了相应的检测实验和结果。     

大亚湾RPC探测器电子学读出传输板设计

主要介绍了大亚湾反应堆中微子振荡实验RPC电子学系统中读出传输板的设计.文章内容包括板子的硬件设计,FPGA的主要逻辑设计以及工程原理样机的建立.目前该读出传输板已经用于RPC电子学系统的测试.     

PSpice程序在阻抗板室探测器研制中的应用

研究提出了阻抗板室（RPC）探测器的电子学模型。基于该模型，通过PSpice程序对RPC探测器的电子学读出信号进行了模拟，模拟结果与实验数据和相关的研究结果一致。通过PSpice模拟，能预测RPC探测器的物理性能，为指导RPC探测器的研制提供了一种有效的优化手段。     

掺钆高阻性板室热中子探测器的性能模拟

利用MCNP和Garfield程序模拟粒子与高阻性板室(RPC)热中子探测器的作用过程,计算出了转换体Gd2O3的最佳厚度和高阻性板室探测器对中子、γ的灵敏度,并得出了热中子和1.25 MeVγ与探测器作用产生的电子能谱。最终利用模拟数据给出了RPC热中子探测器的探测效率和时间分辨随电场、混合气体比例的变化规律,得到了最佳的电场强度和混合气体比例。     

气体比例和工作电压对阻抗板探测器时间分辨率的影响

阻抗板探测器（ResistivePlateChamber,RPC）是利用高阻抗性材料制作的气体探测器,用于探测高能带电粒子的径迹和时间。RPC的制作工艺简单,容易进行批量生产。RPC具有可与闪烁体探测器相媲美的时间分辨率和很高的探测效率,双层RPC的探测效率在95％以上。RPC有两种工作模式：雪崩模式和流光模式。     

阻性板探测器RPC的性能分析

本文介绍了目前在国际上较为先进的气体探测器--RPC阻性板探测器,结合北京谱仪上的Muon探测器的研制和组装测试,展示了此探测器的良好性能和优良的发展前景.实验测试系统是在Linux操作系统下实现的基于Root图形界面的宇宙线测试系统,通过对大量的实验数据的统计分析,比较了不同体电阻率和面电阻的RPC的探测效率、单计数率和暗电流,并分析了体电阻率、面电阻与RPC性能的定性关系.     

ARGO-YBJ实验硬件系统

中意合作ARGO-YBJ实验采用全覆盖地毯式RPC探测器阵列来探测广延空气簇射事例.讨论了该实验硬件系统结构及工作原理,分析了实验信号采集、处理、传输、缓存和数据输出过程.最后对该实验在"scaler"模式下记录的数据进行了处理分析,结果显示中心区探测器群(Clusters)运行稳定.     

不同玻璃制成的阻性板探测器性能研究

阻性板探测器(Resistive Plate Counter,RPC)以其高性能、低成本及可大面积制作等特点而被推荐作为在建的江门中微子实验(Jiangmen Underground Neutrino Observatory,JUNO)反符合探测器的方案之一。普通浮法玻璃制作的RPC在深地实验中存在易碎裂和易受潮腐蚀等问题,影响性能稳定性及寿命。利用不同性质的玻璃制作三块RPC,对这三种玻璃的特性研究发现,其具有很好的强度、耐酸碱腐蚀性以及较高的体电阻率;对三种RPC进行宇宙线探测性能测试并测量其在雪崩模式下的探测效率、单计数率和暗电流,测试结果表明,三种RPC探测效率在90%95%之间,具有良好的性能,高电阻使RPC需要较高的电压达到效率坪区,也使其适合低本底的实验。     

A RPC test station based on ROOT and VME

Due to its advantages in large-area application situations, the RD of the resistive plate chamber(RPC)has always been carried out. A performance test station for RPC RD has been designed and developed based on the VME bus and ROOT in Linux. This system can be customized expediently according to the requirements of different tests, which facilitates detector RD because of its automatic HV scan, especially for long-term test. With this system, we have implemented the RPC performance test,including the efficiency curve, counting rate, dark current and charge and timing resolution.     

核电站反应堆保护机柜失电缺省值分析研究

为了降低反应堆保护机柜(RPC)失电引入的安全风险,红沿河核电站开展了针对RPC失电的缺省值分析工作,论文在简要介绍红沿河核电站数字化仪控系统(DCS)平台的基础上,对RPC失电相关的缺省值分析范围进行了界定,通过实例对其分析原则进行了介绍,对其实现方式及应用进行了说明。该研究对提升DCS本身的可靠性、电站的安全水平和可用性有重要意义。     

Distributed Low-Voltage System for the Front End of the HADES Timing RPC Wall

The power supply system for the front-end electronics of the HADES resistive plate chamber (RPC) detector, installed at GSI (Darmstadt, Germany), is described. The system has a distributed architecture that includes custom low-voltage boards using isolated DC-DC switching converters. These converters are compact and operate at high efficiency. The converters are fitted with input and output electromagnetic interference filters, resulting in very low output noise. Operational tests of the RPC detector demonstrate that the performance of the detector when powered by this system is comparable to that achieved when powered by laboratory bench supplies, proving its suitability for large-scale applications requiring time resolutions better than 100 ps.     

Fault Current Tests for ITER External Bypass on DC Test Platform in ASIPP

Fault current tests of ITER external bypass are performed to verify its fault suppression capability. This paper describes the test requirements, test schemes and test procedures of fault current test for external bypass. The effectiveness of test schemes for fault current tests is verified by the simulation results and test results based on DC test platform.     

Development and progress in resistive plate chamber

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…     

The simulation and test results of the TSC type RPC & HF system for enhancement of the KSTAR power system stabilization

The Korea Superconducting Tokamak Advanced Research (KSTAR) device requires a large pulse power to generate and confine plasma in order to function as a nuclear fusion device. Such a large pulse power causes voltage-drop and voltage-distortion in the electric power system, because it generates large reactive power and harmonic currents. These effects are detrimental to other experimental devices and deteriorate the power quality delivered by the power system. Therefore, it is important to stabilize the KSTAR power system by compensating for the reactive power and rejecting the harmonic currents using a Reactive Power Compensator (RPC) & Harmonic Filter (HF) system. The TSC type RPC & HF system has been fabricated to have a total capacity of 35 MVar and included two features. The first is a fast response speed of within 10 cycles to compensate for the reactive power. The second is a stable KSTAR power system in which no resonance is detected due to the installation of the TSC type RPC & HF system. This paper presents simulation results of the TSC type RPC & HF system and test results of the plasma experiment of KSTAR carried out in 2009.     

Simulation and test results of low-order band harmonic filters to decrease resonance phenomenon in the KSTAR power system

The superconducting magnet power supply which supplies superconducting magnet coil (SC) with the power to generate plasma during a KSTAR experiment for nuclear fusion research is a nonlinear load. Characteristic harmonics are generally produced since it converts AC to DC using 6 or 12 pulsed operation. However, non-characteristic harmonics or inter-harmonics are generated according to output control characteristics. Also, 95% out of the power generated from superconducting magnet coil is reactive power. Therefore, harmonic and reactive power occurring during operation have some bad influences such as voltage drop, voltage distortion and decrease in power factor on the KSTAR power system, and reactive power compensator (RPC) & harmonic filter (HF) system which is able to compensate harmonic and reactive power at the same time was established and has been operated [1]. However, out of non-characteristic harmonics and inter-harmonics caused by output control characteristics of superconducting magnet power supply, the more compensation volume of the RPC & HF system increases, the more voltage distortion with harmonic expansion is caused by harmonics in a low-order band due to the parallel resonance in a low-order band between the KSTAR power system and the RPC & HF system. As a result, it has serious effect on the injection capacity restriction of the RPC & HF system, the unstable operation control of superconducting magnet coil, and the operation of main cooling facilities. This paper presents reasons of the resonance phenomenon of the KSTAR power system and suggests a design plan of additional facilities for stable operation of the KSTAR power system, and proves their effects through the simulation and test results.     

Physics Performance of the Barrel RPC System of the HARP Experiment

The physics performance of the barrel RPC system of the HARP experiment is described. In the barrel two sets of fifteen identical resistive plate chambers (RPCs) have been operated in 2001 and 2002 as a part of the HARP experiment at the CERN PS accelerator. For the first time under real experimental conditions RPCs have bean applied for particle identification (PID) by measuring the particle's time-of-flight (ToF). The procedure developed for the RPC calibration, based on reconstructed tracks in the HARP Time Projection Chamber (TPC), is described in detail. Intrinsic RPC time resolutions of 141 ps and a combined time resolution of the large angle TOF system of 180 ps are obtained. The effective resolution of the comparison of predicted and measured ToF is 305 ps in the region of interest for this experiment. The PID capabilities of the system are demonstrated. An average efficiency of the RPC counters of about 97% is measured