用于GEM探测器的电容积分式读出芯片的研究

介绍了GEM探测器阵列结构的一种读出方案,重点介绍了该读出方案中开关阵列芯片的设计.主要内容包括PAD前端读出电子学结构,开关电容阵列结构工作原理,开关阵列芯片设计,文章的最后给出了芯片测试结果.该10通道开关电容阵列芯片可以扩展为更多的通道,以满足更大规模的GEM探测器的阵列方式读出需要.     

基于APV25读出电子学系统的GEM探测器的位置分辨与X射线成像研究

采用3层GEM膜制作了有效面积为10 cm×10 cm的GEM探测器,该探测器采用二维条读出方式,条间距为400 μm,每个维度有256个读出通道。探测器的读出采用APV25读出电子学系统,根据GEM探测器的需要,设计并改进了电子学系统使用的背板连接器。实验测得GEM探测器空间分辨为76 μm。进行了X射线二维成像研究,获得了清晰的二维图像,探测器与电子学运行稳定可靠。     

基于GEM探测器的数字读出芯片研制

研制了一种适用于高能物理GEM探测器读出系统的数字芯片。芯片采用PAD读出方式,对GEM探测器的输出直接采样,对采样到的信号放大并成形,判断该输入是否超过由外部DAC设定的阈值,给出判断结果,并按照一个串行协议读出。芯片采用0.35μm/3.3 V CMOS工艺设计,后仿真结果显示芯片达到预期研制目标。     

基于峰值保持电路的GEM探测器前端读出ASIC设计

介绍了一种用于多层GEM探测器的低噪声前端读出ASIC芯片.针对GEM探测器输出信号特点,设计了电荷灵敏放大器、整形电路和峰值保持电路,并对其噪声、成形时间等设计指标参数进行了分析.     

GEM探测器延迟线读出方法的模拟研究

采用MATLAB-Simulink环境下的SimPowerSystem程序,对GEM探测器的延迟线读出方法进行了模拟和计算.介绍了延迟线读出电路模型的建立方法,给出了相关的模拟和测试结果.     

四通道低噪声GEM探测器前端读出ASIC设计

介绍了一种用于多层GEM探测器的低噪声前端读出ASIC芯片.针对CEM探测器输出信号特点,设计了电荷灵敏放大器、极零相消电路和准高斯成形电路,并对其噪声指标、成形时间等设计指标等参数进行分析.     

16通道GEM探测器前端读出ASIC的设计

介绍了用于GEM(Gas Electron Multiplier)探测器读出的ASIC芯片GEMROC(GEM ReadoutChip)的设计.该芯片采用Chartered 0.35μm 2P4M CMOS工艺,单片集成16个读出通道,每个通道包括电荷灵敏前放(CSA)、CR-(RC)2成形电路和驱动电路.增益和成形时...     

多丝正比室电荷测量电路的研究

简要介绍了一种用于X射线测量的探测器,多丝正比室(MWPC)的电子学读出系统,重点介绍了该电子学系统中电荷测量(MQ)电路的设计。其中包括了MQ电路的结构,以及FPGA逻辑以及算法的实现。MQ电路可以作为一种通用的读出插件应用在其它探测器的配套电子学读出系统中。最后给出了不同工作方式下的测试结果。     

大面积GEM中子探测器高计数率读出电子学系统研制

研制并测试了GEM中子探测器的512通道高计数读出电子学系统，以满足中国散裂中子源高效率、高分辨、高通量二维位置灵敏中子探测器的需求。系统以Kintex-7 FPGA作为系统控制和数据分析的核心，使用8块AS20Board前端芯片对灵敏面积为200 mm×200 mm的探测器的两个维度的信号进行读出，读出通道为256×256。读出数据经FPGA分析后通过千兆以太网传输至计算机显示。计算机可通过千兆以太网发送配置指令对前端采样电路和FPGA算法进行配置。系统与探测器组装后在中子束流实验中测得系统最高瞬时计数率为（1.2±0.1）×106 s^-1，系统运行稳定，受噪声干扰小。     

GEM探测器α表面污染监测系统研制

研制了大面积GEM探测器,构建了位置灵敏α表面污染监测系统。该系统主要由GEM膜、多路读出电子学系统、数据获取与展示软件等组成。该系统对α粒子的本征探测效率可达95%以上,并实现了系统对α粒子的位置灵敏成像,可为表面污染类α粒子的精确位置测量提供一种有效手段。     

Semiconductor drift detectors for X- and gamma-ray spectroscopy and imaging

The semiconductor drift detectors (SDDs) show basic advantages, in terms of spectroscopic resolution and detection rate, with respect to other semiconductor detectors. These advantages are strictly related to the very low values of the output capacitance of these devices. In this paper the working principles and the performance of the SDDs are presented and the most recent devices (“droplet type” SDDs and monolithic arrays of SDDs) are introduced. The requirements of front-end electronics for the readout of the SDDs signals are then discussed and the most recent implementations (pulsed-reset preamplifiers, multi-channel ASIC readout circuits) are introduced. Some relevant applications of SDDs in the field of X-ray spectroscopy for material analysis and for nuclear physics experiments, and in the field of gamma-ray imaging, are presented as a conclusion.     

Conception and design criteria of a novel silicon device for themeasurement of position and energy of X-rays

In this paper we present the working principle and the design criteria of the Controlled-Drift Detector, a novel device suitable for the simultaneous measurement of energy and two-dimensional position of X-rays. In the Controlled-Drift Detector the pixel structure typical of a charge-coupled device and the fast readout typical of a silicon drift detector are joined. When the radiation is to be detected, suitable potential barriers are generated to prevent the drift of the signal electrons that are confined within a matrix of integration wells. The potential barrier which prevents the drift is selectively removable to allow the fast transport of the confined signal electrons to the readout electrodes by means of a static drift field. In principle such a device can achieve excellent energy resolution and readout times of some tens of microseconds. Three different confining mechanisms that allow control of the drift of the stored electrons are studied, and their advantages and drawbacks are discussed. First prototypes of the Controlled-Drift Detector are currently in production     

基于APD阵列的PET探测器模块电子学

APD阵列γ光子探测器的诸多优点使多特别适用于PET成像技术，根据APD器件本身的特点以及PET系统对探测器模块信号读出的要求，在介绍APD实验模块前端电路的设计和性能测试以后，详细讨论了APD模块电子学的整体设计。     

基于APV25芯片的GEM探测器读出电子学系统的测试与改进

气体电子倍增器(GEM)是目前最具发展前景的位置灵敏气体探测器。其新一代读出电子学系统包括APV25前端卡、多用途数字转换器（MPD)、VME控制器及基于Linux的采集软件DAQ。本工作完成了读出系统的调试,获得了系统在40 MHz和20 MHz工作频率下的理想数据。在长时间测试中,系统运行稳定。通过对软件配置的优化和对硬件的改进,降低了噪声水平,提高了信噪比。     

Development of hybrid photon detectors with integrated siliconpixel readout for the RICH counters of LHCb

We report on the ongoing work towards a hybrid photon detector with integrated silicon pixel readout for the ring imaging Cherenkov detectors of the LHCb experiment at the Large Hadron Collider at CERN. The photon detector is based on a cross-focussed image intensifier tube geometry where the image is demagnified by a factor of 4. The anode consists of a silicon pixel array, bump-bonded to a fast, binary readout chip with matching pixel electronics. The developments and tests of full-scale prototypes with 80% active area are presented. Specific requirements for pixel front-end and readout electronics in LHCb are outlined, and recent results obtained from pixel chips applicable to hybrid photon detector design are summarized     

Application of CMOS charge-sensitive preamplifier in triple-GEM detector

1 Introduction With novel materials and advanced technique of printed circuit board (PCB) and micro-electronics be- ing used in MPGD, over the past two decades, great progress has been made in MPGD[1], and as a new type of MPGD, the GEM[2] detector was developed during the late 1990s. Standard GEM from CERN is a thin, two-side copper-coated Kapton foil, perforated with a high density of holes etched using a photolitho- graphic process. The diameter of these holes is about 70 μm (ext…     

多气隙阻性板室探测器位置分辨性能的模拟研究

多气隙阻性板室（MRPC）具有效率高、时间分辨优异、性价比高以及便于大面积制造的优点，成为缪子成像技术径迹探测器的良好选择。提高MRPC的位置分辨能力，是近年来的研究重点。本文使用ANSYS Maxwell计算了MRPC的三维静电权场，在此基础上研究了在相同MRPC结构下，读出板背面接地、读出条间距以及宽度占比对MRPC位置分辨能力的影响，同时给出了改善MRPC位置分辨性能的设计建议是读出条间距1 mm、宽度占比50%~60%。