Silicon beam telescope for CMS detector tests

A beam telescope providing precision track measurements as reference for other detectors has been upgraded in the CERN H2 test beam. The apparatus was completely rebuilt from the detector wafers and front-end electronics to the data acquisition system. The new detector setup consists of eight 5.6×5.6 cm² sized DC coupled silicon microstrip detectors. Typical position resolution values of about 7.5 μm were measured. Details of the setup are described and results from the recent beam tests are reported.     

基于嵌入式控制器的三电平变频系统设计

三电平变频系统在高性能中大功率交流调速应用中具有重要的作用.首次采用VME总线控制器和嵌入式实时操作系统VxWorks完成对NPC三电平感应电机调速系统的研究开发,对系统的软硬件组成及设计特点进行了介绍,重点对如何在实时多任务嵌入式系统中合理分配资源以获得微秒级执行周期作出描述,并通过实验表明系统具有良好的稳定性、快速性与实时性.     

基于FPDP和VME总线的多DSP通用并行处理系统设计

多信号处理板多处理器系统已经广泛应用于高速信号处理领域。多处理器的结构和子板间的数据传输速度是系统设计的难点。本文具体介绍一种双总线的高速信号处理多子板结构系统。基于VME总线的高可靠性以及FPDP总线的高速传输能力,系统采用VME总线完成板间程序下载,采用FPDP总线完成板间数据传输。并且提出一主三从的多处理器结构,增强了系统的重组性和扩展性。文中详细讨论了该系统中多DSP通用并行处理机的硬件设计,并就系统结构和供电方案给出原理框图。     

嵌入式Web服务器在VME总线测试系统中的应用

介绍了嵌入式Web服务器Wind Web Server的原理和关键技术,并利用嵌入式Web服务器技术实现了一套VME总线测试软件,该软件可用于VME协议所支持的基本功能测试.     

大亚湾中微子实验PMT触发判选电路的初步设计

介绍了用于大亚湾中微子实验的PMT触发判选电路的一种设计方案.从PMT触发判选电路的设计要求谈起,着重讨论了如何采用现场可编程门阵列(FPGA)来实现判选过程及数据暂存,介绍了采用来自GPS的高精度时间信息对事例数据进行时间标记的具体方法.     

A digitalizing board for the prototype array of LHAASO WCDA

In this paper,a digitalizing board for readout of PMT signals in the prototype array of WCDA(water Cerenkov detector array)for LHAASO(Large high altitude air shower observatory)is designed.The prototype array is composed of 9 PMTs,including the pulse time and charge measurement from the PMTs,and clock generation and trigger decision.In the digitalizing board,FPGA reconfiguration and data readout via VME bus are implemented.Test results show that the performances meet well with the requirements of readout electronics.It has been installed in Yangbajing and tests with the prototype array and DAQ is ongoing.     

BESⅢ Muon电子学VME控制扇出插件的优化设计

主要阐述BESⅢ Muon电子学VME控制扇出插件的优化设计,主要内容包括对VME控制扇出插件控制芯片FPGA的固件进行优化,并且设计了相关实验来对优化方案进行测试.     

A new digital beam position monitor in SSRF

The newly developed Digital Beam Position Monitor (DBPM) system is introduced. The DBPM system differs with the conventional beam position monitor system in the use of DSP chips and the digital signal processing technology. It can be programmed on-line to select operation modes through EPICS control panel, and to measure various parameters of the third generation synchrotron radiation facility. This DBPM system can be used in the pre-injector LINAC, the transfer lines, the booster synchrotron and the storage ring. The electronic parameters of the DBPM system itself have been measured also.     

用于核子微探针的多站多参量数据系统

详细讨论了用SUN工作站和VME计算机总线组成的核子微探多站多参量数据系统,包括系统硬件、数据获取和分析软件等。     

基于FPGA的VME总线Slave接口设计

由于VME总线的高性能、并行性、实时性、高可靠性4大特点及模块结构具有良好的抗震性、抗冲击能力,尤其是高可靠性,使其在核工业控制和航空航天领域得到广泛的应用.但是由于VME总线的结构复杂所以在设计上相对复杂,而且采用商用VME接口芯片却往往很难满足航天等特殊环境对高可靠性要求较高的领域要求,故而根据卫星综合电子系统姿态控制的总体需求提出一种利用FPGA来完成VME总线的从设备Slave的逻辑接口功能的设计,使其可以实现VME接口逻辑功能,同时能通过功能裁剪来满足特殊性要求.