Design of FPGA based high-speed data acquisition and real-time data processing system on J-TEXT tokamak
Design of FPGA based high-speed data acquisition and real-time data processing system on J-TEXT tokamak
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DOI：
10.1016/j.fusengdes.2014.01.027
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发表时间：
2014-05
影响因子：
1.7
通讯作者：
Wei Zheng;R. Liu;M. Zhang;Zhuang Ge;T. Yuan
中科院分区：
文献类型：
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作者：
Wei Zheng;R. Liu;M. Zhang;Zhuang Ge;T. Yuan
托卡马克实验需要高速的数据采集和处理系统。在传统的数据采集系统中，采样率、通道数和处理速度都受到总线吞吐量和CPU速度的限制。本文介绍了一种基于现场可编程门阵列的数据采集与处理系统。在将数据传递到CPU之前，可以对数据进行实时处理。与传统的数据采集系统相比，它以更高的采样率为更多的通道提供了处理能力，同时确保了确定性的实时性能。为德克萨斯联合实验托卡马克(J-TEXT)上新建的偏振-干涉仪诊断系统研制了一个工作样机。它提供16个通道，最大采样率为120 MHz，分辨率为16 MHz。车载现场可编程门阵列能够计算等离子体电子密度和法拉第旋转角。采用RAID5存储设备，提供700兆字节/S读写速度，持续将数据缓存到硬盘，性能更佳。
Tokamak experiment requires high-speed data acquisition and processing systems. In traditional data acquisition system, the sampling rate, channel numbers and processing speed are limited by bus throughput and CPU speed. This paper presents a data acquisition and processing system based on FPGA. The data can be processed in real-time before it is passed to the CPU. It provides processing ability for more channels with higher sampling rates than the traditional data acquisition system while ensuring deterministic real-time performance. A working prototype is developed for the newly built polarimeter–interferometer diagnostic system on the Joint Texas Experimental Tokamak (J-TEXT). It provides 16 channels with 120 MHz maximum sampling rate and 16 bit resolution. The onboard FPGA is able to calculate the plasma electron density and Faraday rotation angel. A RAID 5 storage device is adopted providing 700 MB/s read–write speed to buffer the data to the hard disk continuously for better performance.