MDSplus实时数据采集系统

MDSplus实时数据采集系统是EAST长脉冲放电试验的基础工程。依据时间片概念及MDSplus数据库特性,设计系统架构,利用双缓冲机制统一数据采集模块,借助生产者-消费者模式及Liunx多进程机制设计MDSplus存储模块,基于缩略图机制,实现数据访问模块。系统满足设计目标,为后续EAST实验打下坚实基础。     

EAST文档管理系统的设计与实现

为了更好地管理EAST的项目文档和实验文档,以促进实验的顺利运行及各部门之间的相互协作,专门研究与设计了一个适用于EAST的基于B/S结构的文档管理系统。系统采用UID作为文档的唯一标识,通过文档UID可以直接检索定位文档。Web前端运用Ajax技术与jQuery EasyUI,实现页面的局部更新。结合开源PHP框架完成了系统的设计开发,最终实现了文档分类存储、在线操作文档、文档版本控制、文档权限管理及工作流等功能。该系统已成功应用于EAST实验中,极大地提高了各部门的工作效率。     

基于XMPP的EAST实验通信系统的设计与实现

为满足EAST实验中实验信息交互对象的多样性和实验人员远程控制的需求,提出了基于可扩展消息处理现场协议XMPP的即时通信系统方案;该系统是基于可扩展消息处理现场协议,采用C/S模式实现,用于EAST实验信息交流的即时通信系统;在基本通信功能模块实现的基础之上,重点研究设计了EAST实验数据可视化,实验信息共享白板等功能模块;该系统为EAST实验提供了一个良好的即时信息交流平台,为实验数据资源的交流和实验的远程控制提供了方便,在EAST实验中得到广泛的应用.     

基于PXI和FPGA的EAST中央定时系统的研制

中央定时系统在国家大科学工程EAST全超导托卡马克核聚变实验中发挥着重要的作用,它控制着EAST各子系统精准投入实验的时序,从而保证EAST聚变装置能够正常运行。通过对中央定时系统的需求分析,利用基于PXI的FPGA工业级硬件设备和虚拟仪器技术,实现了分布式EAST中央定时系统的研制;该系统能够提供频率范围从1Hz至80 MHz的参考时钟信号,并能产生从1ms至6872s延迟触发信号,其精度为10ns;中央定时系统已投入2010年秋季EAST放电实验运行,应用结果表明,该系统运行稳定可靠,精度高,达到了设计需求。     

Study on Vibrational Distribution of D2 Molecules in Edge Plasmas

The molecules‘s behavior in edge plasma is very important in understanding the phenomena near plasma-facing materials. In this paper, various processes of deuterium molecules are discussed and most recent data are applied in the evaluation of molecules‘ vibrational excitation. For the excitation of the molecules to triplet states, complete sets of vibrationally-resolved cross sections are not available from the literatures. Semi-classical Gryzinski method is used to calculate these cross sections and rate coefficients. Finally, The vibrational distribution of deuterium molecules is calculated by applying a quasi-steady state model for the balance of the vibrational populations. The dependence on the plasma parameters is discussed.     

Web-based Logbook System for EAST Experiments

Implementation of a web-based logbook system on EAST is introduced,which can store the comments for the experiments into a database and access the documents via various web browsers. The three-tier software architecture and asynchronous access technology are adopted to improve the system effectively. Authorized users can view the information of real-time discharge, comments from others and signal plots; add, delete, or revise their own comments; search signal data or comments under complicated search conditions; and collect relevant information and output it to an excel file. The web pages can be automatically updated after a new discharge is completed and without refreshment.     

混合堆、聚变堆包层热工水力与中子学综合分析模拟及FEB混合堆包层综合分析

为了混合堆及聚变堆包层分析的需要，开发了ＢＩＴＨ程序，以对包层的热工水力学及中子学进行综合分析。简述球床的热工水力特征及其数学物理模型，介绍编制的包层热工水力分析程序ＴＨＰＢＨＲ，对ＢＩＳＯＮ１．５全面改造，考虑了共振自屏效应，并与热工水力计算相耦合，并更换ＢＩＳＯＮ１．５自带数据库，修改燃耗计算方法，以适应放射性废物处理、辐照损伤等计算需要。还对ＦＥＢ混合堆外包层用ＢＩＴＨ程序进行了分析。     

Construction and Implementation of the Online Data Analysis System on EAST

In order to obtain diagnostic data with physical meaning,the acquired raw data must be processed through a series of physical formulas or processing algorithms.Some diagnostic data are acquired and processed by the diagnostic systems themselves.The data processing programs are specific and usually run manually,and the processed results of the analytical data are stored in their local disk,which is unshared and unsafe.Thus,it is necessary to integrate all the specific process programs and build an automatic and unified data analysis system with shareable data storage.This paper introduces the design and implementation of the online analysis system.Based on the MDSplus event mechanism,this system deploys synchronous operations for different processing programs.According to the computational complexity and real-time requirements,combined with the programmability of parallel algorithms and hardware costs,the OpenMP parallel processing technology is applied to the EAST analysis system,and significantly enhances the processing efficiency.     

等离子体控制系统用户界面与参数管理

等离子体控制系统是聚变实验中重要的系统之一, 用于对等离子体的各项参数进行实时的反馈控制. 目前自主研发的等离子体控制系统基于组件模型开发, 其核心控制功能通过算法组件执行各种等离子体控制算法来实现, 需要提供图形界面编辑算法的预设参数, 并对参数进行管理, 因此基于PyQt5实现图形界面, 并开发参数配置组件负责参数存储回调, 通过发布订阅通讯机制完成两者的数据传输. 采用可扩展标记语言定义控制算法预设参数信息使得用户界面与控制算法解耦, 通过接口描述语言统一定义参数数据结构, 设计MySQL数据库存储历史参数数据, 并基于发布/订阅通讯机制完成数据通讯.