位置灵敏半导体探测器的测试原理和方法

本文介绍位置灵敏半导体探测器的测试原理以及不用脉冲除法器而用核物理实验室常规仪器测定位置灵敏半导体探测器性能的实验装置和方法。     

电子能量损失符合谱仪的一维位置灵敏探测器的读出系统

介绍了用于电子能量损失符合谱仪的一维位置灵敏探测器的读出系统。一维位置灵敏探测器可以大大提高谱仪的探测效率。其读出系统包括电荷灵敏前置放大器、主放大器、位置信号采集板和接口电路。使用自己设计的信号源对系统进行了测试,取得了较好结果。     

用于束流剖面探测的位置灵敏探测器

介绍了用于剩余气体束流剖面探测系统的位置灵敏探测器的原理和结构。测试了探测器的性能，得到了位置分辨、位置线性、探测效率及探测器本底。     

应用ITO膜作电荷收集极的位置灵敏探测器

首次尝试将ITO（Indium Tin Oxide）膜与微通道板（Microchannel Plate）结合用作位置灵敏探测器，并对该探测器的线性、位置分辨及探测效率作了测试，得到了令人满意的结果。     

延迟线阳极微通道板两维成像探测器

介绍了延迟线两维位置灵敏探测器的原理、结构,制作了有效面积直径达70mm的微通道板延迟线探测器,并利用辐射源对研制的探测器位置分辨、线性响应等性能进行了测试,得到的最好位置分辨为0．1mm。讨论了进一步优化探测器性能的方法。     

双维位置灵敏探测器性能测试

对用于放射性次级束测量的大面积双维位置灵敏探测器（PSD）的性能进行了测试。通过选择实验中电子线路的脉冲成形时间,并改进数据处理方法,即主放大器的成形时间常数要大于6μs,而位置路的时间常数约为0．5－1μs,且在位置公式中使用能量信号作为公母,测试得到了较好的位置分辨和能量分辨及线性。结果表明,这一类型的PSD探测器可以用于低能放射性束流的测量。     

一台锯齿形阳极位置灵敏电离室

本文介绍了一台锯齿形极位置灵敏电离室，它是在普通电离室的基础上把阳极改变为锯齿形结构，从而实现对带电业子位置的测定，用＾２４１Ａｍ源的α粒子对探测器的性能进行了测试，得到的能量分辨为２％，位置分辨好于２ｍｍ。     

用于次级束物理实验的低气压多丝室

阐述了位置灵敏探测器在核物理实验中的作用，同时详细叙述了低气压多丝室(LP—MWPC)的工作机理及时间、位置特性．描述了用于较高能量轻粒子的次级束实验的LP—MWPC的结构和测试结果，得到△X＝△Y＝0．7mm的位置分辨。     

80cm大面积位置灵敏电离室探测器系统

由８０ｃｍ大面积位置灵敏电离室与一维位置塑料闪烁体组成的探测器系统首次在中能重离子核反应实验中进行了测试。电离室可以测量较重的低能离子，有较好的粒子鉴别能力，能给出能量信息及两维位置信息。闪烁体能使该系统用于较高能量轻带电粒子的测量，它能给出能量及一维位置信息，与电离室配合可以进行元素鉴别。     

基于PSD的X射线光束位置探测器设计

位置灵敏探测器(Position sensitive device,PSD)是一种利用光电二极管表面电阻的光电子位置传感器,具有高速度、高分辨率、可靠性好等优点。本文描述了将PSD用于X射线条件性能测试的结果,给出了基于PSD的X射线光束位置探测器(X-ray beam position monitor,XBPM)的一个具体设计方案,并进行了相应估算,初步表明了其可行性。     

电荷除法型位置灵敏探测系统的研究

一、引言电荷除法型单丝位置灵敏探测器与其它定位探测器比较,结构和电子学线路简单可靠、探测的几何长度长,并且具有较好的位置分辨和抗干扰能力,因此它比其它定位探测器有更广泛的应用。     

Study of performance of small gamma camera consisting of crystal pixel array and position sensitive photomultiplier tube

1 Introduction In recent years a great effort has been made in developing compact gamma camera to improve nu-clear medical imaging. Conventional Anger gamma camera[1] uses a NaI(Tl) scintillator block and an array of photomultiplier tube. It has large size and poor spa-tial resolution, thus it is not suitable for small object image. Though the gamma camera using planar crystal coupled with position sensitive photomultiplier tube (PSPMT[2]) could greatly improve spatial resolu-tion,[3-5] pl…     

电荷除法型位置灵敏探测器

本文对电荷除法型位置灵敏探测器的特征和结构进行了描述。并给出了初步的实验结果。     

PSPMT基本特性的实验研究

介绍了ＰＳＰＭＴ的特性测试方法及得到的结果：⑴位置线性：绝对线性０．６３ｍｍ，微分线性０．１ｍｍ；⑵增益均匀性：≤３０％（在灵敏区内）；⑶空间分辨：０．４ｍｍ。     

Study of capsule position monitoring methods for ITER neutron activation system

The reliable monitoring of the position of an encapsulated activation sample is essential to ensure the diagnostic accuracy and the maintenance of the ITER neutron activation system (NAS). Conventional methods using optical or electrical detectors to determine the capsule position is difficult to be used in the ITER NAS because of limited space as well as extremely high electromagnetic and radiation environment. In this study, new methods using the flow rate change inside a transfer tube assembly and the propagation characteristics of sound wave are investigated for the reliable determination of the capsule position. Experimental results confirm that the abrupt reduction of flow rate in the transfer tube assembly provides information for the final position of the capsule with a high spatial resolution less than 1 mm. The variation of flow rate is also found to indicate the operational status of the pneumatic transfer system. In the case of capsule lost accident, a laboratory scale test has demonstrated that the exact position of the lost capsule can be determined by the sound wave method in which the time delay between an incident sound signal and a reflected one by the capsule is measured so as to provide the position of the capsule with a spatial resolution of 0.2 m. These two capsule position monitoring methods are expected to improve the accuracy, operational stability, and the ability to handle the accident in the ITER NAS.     

Synchrotrons radiation stability measurement and improvement

In the 3rd generation synchrotron light source,beside the orbit,air disturbance and ground vibration also could affect the position stability of photon beam in synchrotrons radiation measurement.In the condition of implementation of orbit feedback system at SSRF,the measured position stability of photon beam in synchrotrons radiation measurement station was presented in this paper.And then the improvement methods of position stability of photon beam were discussed.Finally the measured result was shown when the designed feedback system is implemented to improve the position stability of photon beam.     

压水堆控制棒位置故障诊断技术及其软件实现

秦山第二核电厂棒位系统使用PLC软件对控制棒位置进行实时监视,对异常现象进行及时判别,大大提高了控制棒位置故障诊断的及时性、准确性。实现了对棒位故障的判别、记录,实现了测量通道性能判定的自动化。对该软件的功能及其使用效果进行了介绍。     

Beam test results of high Q CBPM prototype for SXFEL

In pursuit of high-precision beam position measurements at micrometers or submicrometers for the Shanghai soft X-ray free-electron laser (SXFEL) facility which is under construction in the vicinity of the Shanghai Synchrotron Radiation Facility,a high Q cavity beam position monitor (CBPM) with a resonant frequency of 4.7 GHz is developed by the Shanghai Institute of Applied Physics,and the relevant BPM electronics with a dedicated RF front end,and a digital BPM,are completed.The cavity design,cold test,system architecture,and first beam test are performed at the Shanghai deep ultraviolet free-electron laser (Zhao et al.in Nucl Instrum Meth A 528(1-2):591-594,2004.doi:10.1016/j.nima.2004.04.108) facility.Results of the beam experiment show that the performance of the CBPM is consistent with basic expectations,and the beam position resolution can fulfill the requirements for the SXFEL project if the beam conditions are optimized.