Multi-channel far-infrared HL-2A interferometer-polarimeter.
Multi-channel far-infrared HL-2A interferometer-polarimeter.
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DOI：
10.1063/1.4739226
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发表时间：
2012-07
期刊：
影响因子：
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通讯作者：
Y. Zhou;Z. Deng;Y. Li;J. Yi
中科院分区：
文献类型：
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作者：
Y. Zhou;Z. Deng;Y. Li;J. Yi
将HL-2A干涉仪改造为干涉仪四弦、偏振仪四弦的多通道干涉仪闪烁偏振计。用波长为432.5 μm、功率为30 mW的远红外激光器在HL-2A装置中平面水平探测等离子体。传统的外差技术用于干涉仪。利用两个反向旋转的圆偏振波测量了法拉第旋转效应。研制了时间分辨率为1 μs、相位分辨率为0.1°的快速相位比较器。此外，还研究了分束器和其他光学元件引起的偏振畸变。
An HL-2A interferometer is upgraded to a multi-channel interferometer∕polarimeter, which includes four chords for the interferometer and four chords for the polarimeter. The far-infrared lasers (at λ = 432.5 μm and 30 mW power) are used to probe plasmas horizontally in the midplane of HL-2A. A conventional heterodyne technique is used for the interferometer. Two counter-rotating circularly polarized waves are used to measure the Faraday rotation effect. A fast-phase comparator with temporal resolution of 1 μs and phase resolution 0.1° is developed. Further, the distortion of the polarization caused by the beam-splitters and the other optical components is also investigated.