MDSplus automated build and distribution system

Support of the MDSplus data handling system has been enhanced by the addition of an automated build system which does nightly builds of MDSplus for many computer platforms producing software packages which can now be downloaded using a web browser or via package repositories suitable for automatic updating. The build system was implemented using an extensible continuous integration server product called Hudson which schedules software builds on a collection of VMware based virtual machines. New releases are created based on updates via the MDSplus cvs code repository and versioning are managed using cvs tags and branches. Currently stable, beta and alpha releases of MDSplus are maintained for eleven different platforms including Windows, MacOSX, RedHat Enterprise Linux, Fedora, Ubuntu and Solaris. For some of these platforms, MDSplus packaging has been broken into functional modules so users can pick and choose which MDSplus features they want to install. An added feature to the latest Linux based platforms is the use of package dependencies. When installing MDSplus from the package repositories, any additional required packages used by MDSplus will be installed automatically greatly simplifying the installation of MDSplus. This paper will describe the MDSplus package automated build and distribution system.     

基于PXI Express的托卡马克同步数据采集系统设计

随着J-TEXT装置的发展,原有的数据采集系统在稳定性、模块化、采样率等方面已不能满足装置运行的需要,所以需建立一套新的数据采集系统来满足实验需求。本文介绍了基于PXI Express的托卡马克分布式高速同步数据采集系统的设计与实现。系统的采集单元由PXIe机箱NI PXIe-1062Q、PXIe控制器NI PXIe-8133和高速同步数据采集卡NI PXIe-6368组成,兼容ITER CODAC最新标准,具有良好的机械封装性、模块化程度高和高采样率等优点。系统采用同步差分采集方式采集实验数据,并将数据存储于核聚变领域通用的MDSplus数据库中。测试和使用结果表明,系统能在2 MSps采样率下连续稳定工作,可较好地满足装置运行的需要。     

Update on the ASDEX Upgrade data acquisition and data management environment

It has been a while since it had been reported on the status of ASDEX Upgrade data acquisition (DAQ) and data management environment. An update on changes, expansions, and enhancements applied in the last years will be given.

• The acquired amount of data per shot increased from 4 GiB to 40 GiB in eight years.
• Network, storage, and archive challenges have been managed by stepwise improvements.
• New DAQ techniques have been introduced to replace outdated technologies.
• Real-time diagnostics speed-up data provisioning and contribute to feedback control.

Information technology applied to ASDEX Upgrade is under permanent change. Recent and future steps are outlined.     

Upgraded data service system for HT-7 Tokamak

A data service system plays an indispensable role in HT-7 Tokamak experiment. Since the former system doesn＇t provide the function of timely data procession and analysis, and all client software are based on Windows, it can＇t fulfill virtual fusion laboratory for remote researchers. Therefore, a new system which is simplified by three kinds of data servers and one data analysis and visualization software tool has been developed. The data servers include a data acquisition server based on file system, an MDSplus server used as the central repository for analysis data, and a web server. Users who prefer the convenience of application that can be run in a Web Browser can easily access the experiment data without knowing X-Windows. In order to adjust instruments to control experiment the operators need to plot data duly as soon as they are gathered. To satisfy their requirement, an upgraded data analysis and visualization software GT-7 is developed. It not only makes 2D data visualization more efficient, but also it can be capable of processing, analyzing and displaying interactive 2D and 3D graph of raw. analyzed data by the format of ASCII, LZO and MDSplus.     

Application of MDSplus on EAST Tokamak

EAST is a fully superconducting Tokamak in China used for controlled fusion research. MDSplus, a special software package for fusion research, has been used successfully as a central repository for analysed data and PCS （Plasma Control System） data since the debugging experiment in the spring of 2006 [1]. In this paper, the reasons for choosing MDSplus as the analysis database and the way to use it are presented in detail, along with the solution to the problem that part of the MDSplus library does not work in the multithread mode. The experiment showed that the data system based on MDSplus operated stably and it could provide a better performance especially for remote users.     

一种死时间极小的多丝室读出系统

该多丝室读出系统是为费米实验室的高触发率固定靶实验Ｅ８７１设计的。系统为流水线结构，包括信号闩锁、去随机ＦＩＦＯ、编码器和缓冲器，死时间小于０．４７μｓ。该系统由多个机箱组成，每个机箱中有多个ＦＥＭ插件和它们的接口ＦＥＭＩ，每个ＦＥＭ接收并处理１２８路丝信号。为了减少读出时间，使用雏菊链电路以读出相对稀疏的数据。所有的操作都由硬件完成，一系列的事例同时在不同级电路中处理，不停地从多丝室读出系统中流     

劳斯阿拉莫斯国家实验室LAMPF数据获取系统

ＬＡＭＰＦ数据获取系统分为通用的数据获取系统和先进的ＭＥＣＡ数据获取系统，文中描述了通用系统的结构及未来打算。ＬＡＭＰＦ ＭＥＣＡ系统的第二阶段触发使用了ＲＩＳＣ工作站及ＶＭＥ接口。文中给出了其实施过程及速度的测量。     

开放式双参数核谱数据获取与处理系统

描述的双参数核谱数据获取与处理处理是一个开放式系统,它作为速器质谱数据获取与控制系统的一部分工作于主控机的ＬａｂＶｉｅｗ环境下,该系统获取每个有效事件的死时间小于２０μｓ,活时间测量精确到ｍｓ量级,感兴趣区可设置成椭圆形等多种形式。     

EXAFS数据采集系统

介绍了一种以多丝正比室作探测器、由IBM-PC计算机构成的EXAFS谱仪数据采集及处理系统,阐明了该系统的设计思想、硬件电路及编程方法,数据采集程序完全由BASIC语言写成。     

多数字信号处理器在SPECT数据采集系统上的应用研究

本文介绍了环境探头ＳＰＥＣＴ数据采集系统利用数字信号处理器技术的几种方案，并在现有的ＭｃＳＰＥＣＴ系统上对几种方案进行测试比较。     

一种简便的热释光剂量仪联机接口

介绍了一种在热释光剂量仪上进行数据采集并实时显示,同时具有数据平滑、拟合、数据格式转换、打印等处理功能的微机接口系统,系统由微机和设有计数器的A/D转换电路的接口板,以及系统软件等组成,该系统大大提高了剂量仪在热释光的测量功能,扩大了应用范围,并已用于热释光剂量学和热释光材料的研究。     

γ相机数据采集接口的模拟通道及模数变换电路的研制

本文介绍了γ相机数据采集系统的模数变换电路的设计及性能指标。     

基于微机的堆控数据获取系统

本文描述了用于反应堆的微机控制数据获取系统,其中较详细地描述了其工作原理、线路设计和软件等。     

一个支持高能物理实验数据获取与数据分析的通用程序系统

本文通过对Fermilab MULTI系统的剖析,介绍一个支持高能物理实验数据获取与数据分析的通用程序系统的结构,功能及系统生成,对在PDP-11/23计算机上运行的0.5级系统的局部改造工作也作了简单介绍。     

用于螺旋CT的数据采集设计方案

对于工业螺旋CT的应用,针对其实时性、数据量大的特点,提出了数据采集系统的设计和实现方法.采用双CPU的系统的设计,一块负责用DMA的方式把CT数据从前置放大器传送到FIFO,另一块负责将FIFO中的数据通过无线网络传送到主控站进行进一步处理.该设计已在现有工业CT中得到应用.     

选择PC／Windows平台开发多参数获取系统

通过需求分析，并考虑到用户的支付能力、国内市场特点、计算机发展趋势以及系统的兼容性、升级扩展能力等，我们选择了ＰＣ／Ｗｉｎｄｏｗｓ平台开发一个多参数获取系统。