A web based MDSplus data analysis and visualization system for EAST

In an EAST (Experimental Advanced Superconducting Tokamak) experiment, the convenient data analysis and visualization tools are very important for physicists and engineering experts to view the operational status of the device. Along with the increasing data sampling rate and pulse length, it will be increasingly challenging for the end user to view the data conveniently under limited Internet bandwidth. We propose a software based on jScope [1] called WebScope for data visualization. By applying java applet techniques, this software can be accessed directly over the Internet via a variety of web browsers without installing client software. Using this data viewer the frequency will be effectively adjusted according to the computer displaying resolution, which saves the total amount of data to be transferred across the Internet and enables the user to view the data quickly. When the signals are zoomed or unzoomed, the data frequency will be re-adjusted to the displaying resolution. With WebScope, data of various experiments in different servers can be viewed in either a single panel or multiple frames, which makes it easier for cross comparison among different data sources. The system was successfully applied to EAST experiment and achieved excellent performance. Its design, function and implementation details will be introduced in this paper.     

EAST装置通用数据分析软件的设计与实现

介绍了EAST 装置聚变实验数据分析与可视化集成软件EastScope的设计与实现.该软件采用ActiveX技术实现了多种格式数据访问方式的统一,调用了MATLAB引擎进行信号表达式运算,使用OpenGL技术完成了阵列信号的三维显示等.只需操作鼠标就可以完成信号的处理、分析、对比以及二维、三维显示,并能用交互式方式实现二维图形的任意轴缩放,三维图形的旋转、平移与缩放.     

反应堆退役三维辐射场实时计算及可视化

本文基于DELMIA和VIRTOOLS平台开发的反应堆退役三维仿真原型系统,提出了仿真系统、数据库和计算内核既相互独立又集成统一的三维辐射场计算和可视化技术方案。利用点核积分算法建立了三维辐射场计算模型,得到了能量的对数与转换系数的多项式拟合公式,考虑了设备屏蔽和自吸收效应。采用VS语言和SQL server软件平台编制了三维辐射场计算程序,经验证,在关键点处的辐射水平计算值与测量值的比值小于10,并嵌入了仿真系统,实现了退役场景三维辐射场的实时计算和数据更新。提出了基于行走路径的人员受照剂量计算方法,并实现了可视化显示。     

MobileCoDaC – A transportable control,data acquisition and communication infrastructure for Wendelstein 7-X

MobileCoDaC is a test bed allowing in situ testing and commissioning the control and data acquisition of components to be operated at Wendelstein 7-X. It is a minimized replica of the functionality of the complete W7-X CoDaC infrastructure and can be operated independently.MobileCoDaC contains a set of W7-X CoDaC servers, network infrastructure, and accessories for remote access. All hardware is mounted in a single transportable rack system. Moreover, it provides the software infrastructure and user applications for experiment preparation, experiment operation, trouble shooting and experiment data access.MobileCoDaC has been operated successfully for test and commissioning of the control and data acquisition of the HEXOS (high efficiency extreme ultraviolet overview spectrometer) diagnostic at Forschungszentrum Jülich.     

Development of Data Processing Software for NBI Spectroscopic Analysis System

A set of data processing software is presented in this paper for processing NBI spectroscopic data.For better and more scientific managment and querying these data,they are managed uniformly by the NBI data server.The data processing software offers the functions of uploading beam spectral original and analytic data to the data server manually and automatically,querying and downloading all the NBI data,as well as dealing with local LZO data.The set software is composed of a server program and a client program.The server software is programmed in C/C++under a CentOS development environment.The client software is developed under a VC6.0 platform,which offers convenient operational human interfaces.The network communications between the server and the client are based on TCP.With the help of this set software,the NBI spectroscopic analysis system realizes the unattended automatic operation,and the clear interface also makes it much more convenient to offer beam intensity distribution data and beam power data to operators for operation decision-making.     

Operator interface programs for KSTAR operation

Beginning the first plasma discharging experiment of KSTAR since 2008, KSTAR performed the third plasma discharging experiment by 2010. During the experiment of three times, KSTAR OPerator Interface (OPI) programs have been developed for KSTAR operation by itself. OPI programs used in KSTAR were implemented by KSTAR widget plug-in Toolkit (KWT). The KWT means the plug-in library implemented by Qt-based user interface development software. The main purpose of developing the KWT library is to implement full automation libraries having interface with the automated EPICS channel access (CA) guaranteeing the flexibility for requirements of operators. In addition, it has advantages in minimizing human code error and maximizing utilization of the limited human resource. According to the increasing of control systems, a number of OPI servers connected to one EPICS gateway server caused the connection problem and increased the amount of the network data packets. To solve these problems, an algorithm of “CachedChannelAccess” for shared memory base was implemented into an inner logic of the KWT library. KSTAR control system monitoring (CSM) program is one of applications developed by using KWT library. The function of CSM program is to notify alarm to operators by checking health status of every server's network health status and resource (cpu, memory, network packets, disk usage rate and system/user defined process) usage state. Another application is a post-shot sequencing program which is activated after every shot is completed. This application is to display major plasma parameters and diagnostic data in chart form, to save this data to database, and to transfer a chart image file to a web server. This paper describes the technical details how to develop OPI applications which have high productivity using Qt on the EPICS-based control system.     

Study of load balancing technology for EAST data management

With the continuous renewal and increasing number of diagnostics, the EAST tokamak routinely generates ∼3 GB of raw data per pulse of the experiment, which is transferred to a centralized data management system. In order to strengthen international cooperation, all the acquired data has been converted and stored in the MDSplus servers. During the data system operation, there are some problems when a lot of client machines connect to a single MDSplus data server. Because the server process keeps the connection until the client closes its connection, a lot of server processes use a lot of network ports and consume a large amount of memory, so that the speed of access to data is very slow, but the CPU resource is not fully utilized. To improve data management system performance, many MDSplus servers will be installed on the blade server and form a server cluster to realize load balancing and high availability by using LVS and heartbeat technology. This paper will describe the details of the design and the test results.     

三维可视化技术在矿产资源勘探领域中的应用探讨

地质体三维可视化技术的研究是“数字勘探”领域的重要组成部分，本文针对矿产资源勘探数据的特点，研究了适合地质体信息三维可视化的体素模型和空间插值算法。基于交互式数据语言(IDL)，开发了三维数据可视化软件；该软件能够快速、准确地将地质体的空间展布形态以及物性特征展示出来。     

Design of Waveform Generator for NBI in EAST

The control system of neutral beam injector (NBI) monitors the status of NBI equipments, controls all of the power supply, realizes data acquisition and network, and provides a unified clock for all subsystems of NBI system. As an important part of NBI control system, waveform generator (WG) monitors the parameters of the experiment and displays these parameters in the waveform terminal. The WG software also can send simple experiment commands and make it easy for experiment test. The WG software develops under Windows operating system, using labview language. The design is related to many kinds of technologies, such as client/server communication, multithreading and cyclic redundancy check technology, TCP protocol and so on.     

Design and implementation of data acquisition system for magnets of SST-1

The magnet system of the Steady-State Superconducting Tokamak-1 at the Institute for Plasma Research, Gandhinagar, India, consists of sixteen toroidal field and nine poloidal field. Superconducting coils together with a pair of resistive PF coils, an air core ohmic transformer and a pair of vertical field coils. These magnets are instrumented with various cryogenic compatible sensors and voltage taps for its monitoring, operation, protection, and control during different machine operational scenarios like cryogenic cool down, current charging cycles including ramp up, flat top, plasma breakdown, dumping/ramp down and warm up. The data acquisition system for these magnet instrumentation have stringent requirement regarding operational flexibility, reliability for continuous long term operation and data visualization during operations. A VME hardware based data acquisition system with ethernet based remote system architecture is implemented for data acquisition and control of the complete magnet operation. Software application is developed in three parts namely an embedded VME target, a network server and a remote client applications. A target board application implemented with real time operating system takes care of hardware configuration and raw data transmission to server application. A java server application manages several activities mainly multiple client communication over ethernet, database interface and data storage. A java based platform independent desktop client application is developed for online and offline data visualization, remote hard ware configuration and many other user interface tasks. The application has two modes of operation to cater to different needs of cool-down and charging operations. This paper describes application architecture, installation and commissioning and operational experience from the recent campaigns of SST-1.     

A new web-based tool for data visualization in MDSplus

The Java tool jScope has been widely used for years to display acquired waveform in MDSplus. The choice of the Java programming language for its implementation has been successful for several reasons among which the fact that Java supports a multiplatform environment and it is well suited for graphics and the management of network communication. jScope can be used both as a local and remote application. In the latter case, data are acquired via TCP/IP communication using the mdsip protocol. Exporting data in this way however introduces several security problems due to the necessity of opening firewall holes for the user ports. For this reason, and also due to the fact that JavaScript is becoming a widely used language for web applications, a new tool written in JavaScript and called WebScope has been developed for the visualization of MDSplus data in web browsers.Data communication is now achieved via http protocol using Asynchronous JavaScript and XML (AJAX) technology. At the server side, data access is carried out by a Python module that interacts with the web server via Web Server Gateway Interface (WSGI).When a data item, described by an MDSplus expression, is requested by the web browser for visualization, it is returned as a binary message and then handled by callback JavaScript functions activated by the web browser.Scalable Vector Graphics (SVG) technology is used to handle graphics within the web browser and to carry out the same interactive data visualization provided by jScope. In addition to mouse events, touch events are supported to provide interactivity also on touch screens. In this way, waveforms can be displayed and manipulated on tablet and smartphone devices.     

IR-FEL装置数据存档和查询系统

IR-FEL装置控制系统是基于EPICS的分布式控制系统，装置运行过程中产生的历史数据可用于装置的性能分析和故障诊断，对装置的性能提升和运行维护具有重要意义。本文以Archiver Appliance作为历史数据存档工具，采用前、后端分离的软件架构，设计和开发了IR-FEL装置数据存档和查询系统。系统后端包含历史数据查询和实时数据推送两种服务端程序，使用Nginx反向代理服务器提供了统一的数据查询接口；前端是基于Vue.js的单页应用，提供了历史数据定制查询、自由查询和运行状态显示页面。系统自投入运行以来，性能稳定、功能完善，满足了IR-FEL调试和运行的需求。     

三维可视化核电安全壳配筋系统研究与应用

依托在建核电项目,在国际通用的工厂设计软件PDMS基础上,设计和研发三维可视化核电安全壳配筋系统,研究数字化智能配筋算法,通过软件驱动配筋计算方程,进行安全壳配筋可视化、数字化、自动化设计, 并以三维数据为基础实现高效的二维抽图等设计数据输出功能。研究成果在项目上的应用不仅提高了三维设计精度和效率,同时极大提高了设计质量,具有一定的推广应用意义。?      

锦屏深地强流高压加速器控制系统的研制

本文介绍了锦屏深地强流高压加速器自动控制系统的基本结构、控制软件和安全联锁设计,阐述了该加速器在运行过程中高压打火产生的强干扰影响控制系统和相关设备的正常运行及在调试和实验过程中遇到的问题。通过分析原因,采取各种保护措施提高控制系统的抗干扰能力,确保控制系统和设备运行的稳定性。     

Data Server Application Software for Neutral Beam Injection Control System

The neutral beam injection (NBI) heating is one of the mainly auxiliary plasma heating methods for EAST. In this paper, a data server application software is presented for NBI control system. This application software is developed on Centos OS by C programming language with TCP and multithreading technology. It mainly focuses on storing and querying experimental pulse data and engineering data; experimental user’s operation records; experimental configuration information; the collected data after processing; as well as managing and releasing experimental discharge shot number and so on. By using the unified data header structure, the data server software provides universal information exchange interfaces for different service request terminals with different operating platform, such as WinCC, Labview. With the help of data server software, those problems related on the storage, querying and processing of information and data for NBI control system are well solved.     

Advanced methods in teaching reactor physics

Modern computer codes allow detailed neutron transport calculations. In combination with advanced 3D visualization software capable of treating large amounts of data in real time they form a powerful tool that can be used as a convenient modern educational tool for (nuclear power plant) operators, nuclear engineers, students and specialists involved in reactor operation and design. Visualization is applicable not only in education and training, but also as a tool for fuel management, core analysis and irradiation planning. The paper treats the visualization of neutron transport in different moderators, neutron flux and power distributions in two nuclear reactors (TRIGA type research reactor and typical PWR). The distributions are calculated with MCNP and CORD-2 computer codes and presented using Amira software.     

300MW核电站设计数据库系统分析

叙述了上海核工程研究设计院开发的３００ＭＷ核电站设计数据库系统结构及主要子系统的功能。该系统采用ＩＢＭ的ＲＳ／６０００工作站作为服务器，运行ＯＲＡＣＬＥ７．０，通过Ｅｔｈｅｒｎｅｔ及ＴＣＰ／ＩＰ协议与客户机端的ＰＣ通讯。在服务器及客户机端开发的应用程度具有较好的数据完整性、安全性，网络透明性以及良好的图形界面等优点。