Recent Progress of the HL-2A Laser Interferometer  

作　　者：周艳 邓中朝 易江 李永高 李连才 郑玲 赵开君 杨青巍 丁玄同 段旭如 

机构地区：[1]Southwestern Institute of Physics, Chengdu 610041~ China

出　　处：《Plasma Science and Technology》2009年第4期413-416,共4页等离子体科学和技术（英文版）

基　　金：National Natural Science Foundation of China (Nos.10575030,10675043);the JSPS-CAS Core University Program in the field of Plasma and Nuclear Fusion

摘　　要：A new multi-channel far infrared （FIR） laser interferometer was built up and ap- plied to HL-2A. The unique feature of real-time heterodyne interferometer is the combination of high power radiation source （300 mW）, lower noise room temperature detector （noise tempera- ture below 6000 K） with good spatial resolution of 7 cm. Various parameters are optimized for maximum laser output power. Zero crossings of the signals are counted with field programmable gate array （FPGA） digital circuitry yielding the resolution of 1/1000 fringe. The newly measured results including density fluctuation are also presented.A new multi-channel far infrared （FIR） laser interferometer was built up and ap- plied to HL-2A. The unique feature of real-time heterodyne interferometer is the combination of high power radiation source （300 mW）, lower noise room temperature detector （noise tempera- ture below 6000 K） with good spatial resolution of 7 cm. Various parameters are optimized for maximum laser output power. Zero crossings of the signals are counted with field programmable gate array （FPGA） digital circuitry yielding the resolution of 1/1000 fringe. The newly measured results including density fluctuation are also presented.

关 键 词：FIR laser interferometer MEASUREMENT density fluctuation 

分 类 号：TN791[电子电信—电路与系统] TH744.3[机械工程—光学工程]