摘要
A real-time magnetic island reconstruction(MIR)system based on PCI express platform for HL-2 A tokamak is introduced.The front-end analog circuit and high performance analog-to-digital converters complete high-precision synchronous sampling of 18 channel Mirnov signals,and the application of PCIe platform and direct memory access technology enables high speed data transmission between graphics processing unit and field programmable gate array(FPGA).FPGA,as a mainstream high speed parallelizable computing tool,was used to implement the MIR algorithm,while a parameter table is established in an external double data rate SDRAM to improve the computational efficiency.The software of the MIR system is developed with Compute Unified Device Architecture 8.0 in Centos 6 system,which mainly realizes driver development,data transmission,network communication,parameter calculation and system control.This system has been tested in HL-2 A plasma discharge experiment,and the reconstructed magnetic island structure can achieve a spatial resolution of 1.02 cm while the time resolution can reach 2 ms.
作者
李枭鹏
陈超
范伟伟
朱仁杰
黄思诚
温昕澄
何宗武
杨青巍
阴泽杰
Xiaopeng LI;Chao CHEN;Weiwei FAN;Renjie ZHU;Sicheng HUANG;Xincheng WEN;Zongwu HE;Qingwei YANG;Zejie YIN(State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,People's Republic of China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,People's Republic of China;Southwestern Institute of Physics,Chengdu 610041,People's Republic of China)
基金
supported by National Natural Science Foundation of China(No.11575184)。