中性束注入器Tank充气特性对离子源放电的影响

利用对PV-10型压电阀定标实验,研究了中性束注入器Tank内补充气体的参数对离子源放电弧电流的影响,对比压电阀脉冲电源的脉宽和幅值,显示后者对Tank内补充气体量具有更显著的线性关系.据此进行的中性束注入器离子源放电实验结果表明,采用压电阀定标值计算获得的参数,可以稳定重复地获得最大放电脉宽达到400 ms的等离子体弧电流,为下一步向托卡马克装置注入高能中性粒子束奠定了应用基础.     

HT-7诊断中性束装置真空远程监控系统设计

本文介绍了真空实时远程监控系统的设计要求,讨论了该系统的硬件设计、软件设计及其工作原理,给出了部分实验结果。系统成功地应用于实验并获得理想的实验结果,为诊断中性束稳态运行提供可靠保障。     

NBI离子源源头电源控制系统研究与设计

中性束注入(NBI)加热被国际聚变界公认为最有效的加热手段,其离子源源头电源控制系统的研制是中性束注入器的关键技术之一。通过研究高电压、高磁场环境对控制系统的影响,综合系统灵活性、易维护性、稳定性等诸方面因素设计了离子源源头电源控制系统,并开发了上位机监控程序、PLC程序和相关的硬件接口电路以及现场模糊控制系统。离子源源头电源控制系统为用户提供了良好的人机操作界面,经在测试平台的离子源起弧实验证明,有效地提高了NBI离子源放电实验的效率,为今后的NBI束线装置工程设计和研制奠定了基础。     

Using Adaptive Discrete-Time Gas Supply Control for Long Pulse Arc Discharge of Ion Source on NBI

A control model of gas supply system is introduced for ion source and an adaptive discrete-time control algorithm to regulate the hydrogen injection. A real-time feedback control system （RFCS） is designed to control the gas supply for ion source based on the control model and the discrete-time control algorithm. The experimental results have proved that RFCS could regulate the gas supply smoothly, suppress the arc＇s abrupt over-current at the end of the ion source discharging, prolong the discharge pulse and stabilize the ion concentration. With RFCS, the ion source for neutral beam injection has reached its longest pulse with a length of 4.5 seconds in a stable status.     

中性束注入器低温泵液氮管道压力自动控制

中性束注入器(NBI)低温泵管道液氮压力波动原因,提出模糊控制算法自动控制低温泵管道液氮压力。通过设计模糊规则表及Matlab仿真验证,实现了在NBI实验中对低温泵管道液氮压力的自动控制。结果表明,模糊控制算法对自动控制NBI低温泵管道液氮压力有较明显的效果。     

基于静电探针测量对双潘宁离子源的弧特性研究

本文介绍了采用静电探针的逐点测量法和锯齿波扫描测量法来测量离子源放电中等离子体参数,在此基础上利用静电探针所测量的离子饱和流信号作为控制部分反馈变量,使用闭环控制对22厘米双潘宁离子源的等离子体进行调节,并且利用探针所测量的结果对弧特性进行了初步的分析.     

分布式控制系统在中性束注入实验中的应用

介绍了中科院等离子体所HT-7托卡马克装置上中性束注入(NBI)控制系统设计方案和实现方法。系统采用分级分布式结构,由PLC时序控制单元、数据采集与处理单元、参数预设单元和真空与低温监控单元组成;各单元采用网络通讯互联,实现数据的传输和控制命令的执行。系统成功地应用于实验并获得理想的实验结果,为中性束注入加热的稳态运行提供可靠保障。     

Data Processing Middleware in a High-Powered Neutral Beam Injection Control System

A set of data-processing middleware for a high-powered neutral beam injection(NBI) control system is presented in this paper.The middleware,based on TCP/IP and multi-threading technologies,focuses mainly on data processing and transmission.It separates the data processing and compression from data acquisition and storage.It provides universal transmitting interfaces for different software circumstances,such as WinCC,LabView and other measurement systems. The experimental data acquired on Windows,QNX and Linux platforms are processed by the middleware and sent to the monitoring applications.There are three middleware deployment models:serial processing,parallel processing and alternate serial processing.By using these models,the middleware solves real-time data-processing problems on heterogeneous environmental acquisition hardware with different operating systems and data applications.     

The Power Supply System of Ion Source for NBI

The power supply system of ion source for the Neutral Beam Injector (NBI) in the HT-7 superconducting tokamak is based on a single injector with one ion source that can deliver 700 kW of neutral beam power. Experiments and a discharges test on the ion source were successfully performed. In this paper, the circuit structures and features of every power supply are described and the results of the discharges test are presented.