27 串列加速器实验室Midas-VME数据获取系统调试总结

串列加速器实验室自80年代引入基于CAMAC的数据获取系统以来，数据采集的前端电子学一直基于CAMAC系统。随着VME标准的成熟，在国内外实验室的已经得到广泛的普及和应用，已经成为核物理实验数据获取系统必备的配置，而且价格也明显低于相同的CAMAC系统。为了满足串列实验室日益增大的数据采集量，也为了方便与国内外实验室交流，串列加速器实验室需引进基于VME的数据获取系统。自2003年以来，从软硬件两方面对VME数据获取系统进行了大量的调研，并与物理实验人员进行了多次协商讨论，确立了VME＋Midas＋Linux数据获取系统的方案。     

基于VME总线的FADC数据采集系统的建立

Flash ADC可以记录实验中的完整电流或电压波形,为实验数据的离线分析提供更多的信息.本工作利用CAEN V729A四通道40MHz FADC以及峰敏感V785N ADC插件,建立了基于Linux操作系统和VME总线的小型实验数据获取系统.该系统将用作暗物质探测实验中反冲核抑制因子的中子散射测量实验研究的数据获取,并根据实验要求利用系列低能γ(X)射线对该数据采集系统支持的高纯锗(HPGe)探测器进行了能量刻度,得到了高纯锗(HPGe)探测器系统的能量线形和可探测的能量低阈值.     

光电倍增管批量测试平台多协议软件系统的开发

开发了PMT批量测试平台的软件系统,主要包括:基于VME总线的数据获取系统,测试平台中硬件设备的远程监控系统。其中数据获取是Linux操作平台下基于VME总线的控制与数据采集系统,对一系列电子学插件完成控制、数据获取与存储的过程;硬件设备主要包括CAEN系列高压电源、多通道信号发生器与步进电机,其远程监控使用RS232串口总线通讯技术、TCP/IP网络通讯技术等技术手段来实现。系统采用模块化设计,根据不同测试项目的具体需求将数据获取与设备远程监控模块灵活调用,可实现光电倍增管多种性能的自动化测试。     

光束线站EPICS数据采集系统研究

上海光源光束线控制系统采用标准软硬件平台开发完成.为实现XBPM测量及电离室等探测器要求的运动控制与信号采集的联动集成,本文用Hytec公司的ADC/DAC模块建立一套VME/IOC的EPICS数据采集系统.经光束线在线测试,该系统完全可应用在XBPM同步光位置诊断、单色器能量控制与探测器信号同步采集等相关用户实验中.     

VME数据获取系统调研

数据获取系统的作用和功能是收集核物理实验中的核反应数据,将探测器产生的含有发生核反应信息的电子学信号数字化,并以适当的格式存储,以便以后能进行反演分析。 数据获取系统的前端总线标准经历了CAMAC、FastBus、VME等发展过程。CAMAC数据获取系统因应用早、应用广泛,现仍拥     

基于VME主设备的高速读出电路设计

本文简要介绍了BESⅢ主漂电子学和数据获取系统之间的数据传输相关情况.详细介绍了一种基于VME主设备的接口电路设计,此电路用于VME总线上的数据读出与传输,具体包括PCB设计与FPGA程序实现,最后给出了测试方法和相关结果.     

基于LabVIEW的探测器测试系统

介绍了构建基于LabVIEW的探测器测试系统的方法。该系统将探测器的输出信号经过放大和模数变换，得到所测的幅度谱或时间谱。模数变换由基于VME总线的峰值检测ADC实现，数据采集、谱形绘制、结果的保存通过LabVIEW编写的虚拟仪器程序完成。     

VME测试系统在嵌入式Linux上的实现

介绍了基于VME总线的测试系统,该测试系统采用PowerPC作为VME机箱的读出插件、嵌入式Linux为操作系统,实现电子学小系统测试的相关功能.首先介绍了系统相关硬件和软件框架及本系统的关键技术和各项功能模块的实现,最后介绍了图形用户界面.该系统可以用于基于VME总线的系统测试以及初步的系统控制.     

VIC068A在电源控制系统中的应用

VME总线为单处理器或多处理器的高速并行传输建立了标准体系规范,利用桥接芯片VIC068A的硬件逻辑连接实现网络处理芯片与VME背板总线之间的通讯,将后台计算机数据库及前端设备通过网络和VME总线紧密地连接起来,实现数据的快速获取与给定.     

CAN总线在北京正负电子对撞机直线加速器控制系统中的应用

以CAN总线在北京正负电子对撞机(BEPC)直线加速器控制系统中的应用为例,介绍了CAN总线的特点,系统结构以及基于VME总线的CAN接口卡在实验物理和工业控制系统(EPICS)中的软件设计。CAN总线已成功地在北京正负电子对撞机直线加速器控制系统的磁铁电源控制EPICS样机系统中得到应用,取得了满意的结果。     

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.     

The control and monitor system for the BESⅢ ETOF/MRPC beam test

A test system is developed for the BESIII ETOF/MRPC beam tests of data acquisition, environment monitoring and automatic control. The software framework is based on the CAMAC bus, VME bus and Serial Port,which are responsible for communications with the detectors. The monitor system works well in the beam test.     

基于PC机的VME总线从设备调试系统

本文介绍了一种基于ＰＣ机的ＶＭＥ从设备调试系统，它利用ＰＣ机作为ＶＭＥ总线主设备，通过软件编程产生适当的ＶＭＥ总线时序，可对ＶＭＥ从设备模块进行调试和功能测试。     

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。     

An integrated data acquisition and analysis system at GSI

The GOOSY data acquisition and analysis system has been extended to handle experimental setups and data from heavy-ion experiments at high energies. A front-end system has been designed and built. It is a VME-based multiprocessor system connected to CAMAC and FASTBUS by a standard VME subsystem bus. The system allows preanalysis and filtering of the raw data. The architecture of the system is presented, and a status report is given. Particular attention is given to integration of the front-end processors, event processing in the front-end system, and the VME network processor. Event data transfer from VME to VAX, test procedures, experimental setup control, and software used for the VME processors are briefly considered     

A scanning and data acquisition system for the Lund proton microprobe

A computer system for scanning control and the evaluation of data obtained using a scanning proton microprobe is described. The system consists of a μVax-II host computer and a VME bus data acquisition and beam scanning system. The VME bus computer controls the front-end electronics, such as ADCs, and sends data in blocks to the μVax-II which does the on-line sorting of data and elemental mapping. To facilitate fast and effective analyses, a software package has been developed which gives the user the possibility of manipulating data acquisition, beam scanning etc. during sample analysis.     

A VME multiprocessor data acquisition system combining a UNIXworkstation and real-time microprocessors

A data acquisition system combining a UNIX workstation and one or several real-time microprocessors has been designed and built for the tandem accelerator. The hardware and software options chosen for reading, processing, storing, and displaying real-time experimental data are detailed. The fixed components of the hardware architecture are the VME bus for data processing and the CAMAC system for transferring digital data. A multitask multiprocessor software based on shared memory and message passing has been developed around a mixed UNIX/pSOS kernel     

基于VME总线的高速A／D缓冲系统的研制

本文介绍一种基于ＶＭＥ总线的高速Ａ／Ｄ缓冲系统的原理和结构。着重阐述了高速数据采集技术，高速ＦＩＦＯ缓冲技术，存储器总线切换技术，ＶＭＥ及ＰＣ／ＩＳＡ总线接口技术在本系统中的成功应用。     

An expert diagnostic system for the MACRO experiment at the GranSasso Laboratory

The maintenance of the MACRO (a Monopoles, Astrophysics and Cosmic Ray Observatory), a large-area detector that will be used to search for rare constituents or phenomena in cosmic radiation penetrating deep underground, is addressed. A real-time expert system for diagnosing detector and data acquisition system anomalies, which is based on the NEXPERT commercial tool, is described. It performs online diagnosis and, if an abnormal condition is identified, takes the appropriate action to reduce the unavailability of the apparatus. The data acquisition system is CAMAC-based, and the sensor modules, which gather the significant values for diagnosis, are implemented in the VME crate     

SC／GPM－68K VME系统控制器及通用主设备

ＶＭＥ系统控制器和作为总线主设备的数据处理装置是构成系统最基本的不可缺少的模块。本文介绍了廉价的ＳＣ／ＧＰＭ－６８Ｋ型ＶＭＥ系统控制器及通用主设备的硬件设计特点及其交叉Ｃ和交叉汇编用户程序的开发环境。