HL-2A装置YAG激光汤姆逊散射测量电子温度的初步结果
Primary results of measuring plasma electron temperature with YAG laser Thomson scattering system on the HL-2A Tokamak
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摘要: 叙述了激光汤姆逊散射的实验原理，介绍了HL-2A装置上改进后的激光汤姆逊散射系统。高脉冲功率Nd：YAG激光光源发出的1 064 nm的激光能很好地满足测量等离子体电子散射光的要求，硅雪崩光电二极管和窄带干涉滤波片组成的多色仪的使用，大大提高了散射光的测量效率。数据处理方法采用按测量误差进行权重分析的查表法，提高了数据处理的速度。最后介绍了各种放电条件下的单空间点电子温度的测量结果。Abstract: This article describes the laser Thomson scattering principle and the developed system on HL-2A device. The high power Q-switch Nd:YAG laser, with a wavelength of 1 064 nm, can sufficiently satisfy the measurement requirement. The polycromator consisting of avalanche photo-diodes(APD) and narrow band interference filters, can effectively improve the measurement of scattering light. The electron temperature is deduced by error-weighted lookup table method, which improves the data-processing speed or efficiency. Finally, the experiment results of the one-point electron temperature during different discharges of plasma are presented.
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