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汤姆逊散射诊断原理简介

汤姆逊散射诊断原理简介. 等离子体中的电子在强激光的作用下，产生次级辐射形成散射波，若不考虑相对论效应，其功率谱的形状因子为：. 式中，  0 为入射激光的波长。 Δλ 散射谱波长与入射波长差。 只要实验中测出了散射谱的情况就可以得到等离子体的电子温度和密度。. 若考虑相对论效应，在不同温度下，散射谱的分布如右图. HT-7 T.S. 示意图. HT-7 激光汤姆逊散射测量系统说明. 激光器. polorized YAG laser. 探测器 EG&G Si-APD. Pre-Amplifier for Si-APD detector.

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汤姆逊散射诊断原理简介

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  1. 汤姆逊散射诊断原理简介 等离子体中的电子在强激光的作用下，产生次级辐射形成散射波，若不考虑相对论效应，其功率谱的形状因子为： 式中，0为入射激光的波长。Δλ散射谱波长与入射波长差。 只要实验中测出了散射谱的情况就可以得到等离子体的电子温度和密度。 若考虑相对论效应，在不同温度下，散射谱的分布如右图

  2. HT-7 T.S.示意图

  3. HT-7激光汤姆逊散射测量系统说明

  4. 激光器 polorized YAG laser 探测器 EG&G Si-APD Pre-Amplifier for Si-APD detector

  5. 干涉滤光片分光谱仪 散射信号经分光后分为五道。 测量点的空间分辨率1.8cm。

  6. +5v Tungsten Lamp To CAMAC chopper lens lens Photodiode fiber 校准系统 •  Optical Path Alignment(He-Ne and Laser) •  Energy Calib.(Energy Meter) •  Spatial position Calib.(movable target) • Sensitivity of 5 Channel spectrum(Tungsten Lamp) • Rayleigh scattering Calib. For density measurement. 数据采集系统

  7. 数据处理 Get the temperature through lookup the table For each a fixed temperature get the weighted average temperature 时序 查表法 分光仪中任意两道信号的理论比值R是电子温度Te的函数。寻找测量得到的该两道信号的比值R*与理论比值R最接近的值，得到对应的温度值就是测量的电子温度。 5道分光可得到10个测量的电子温度值，根据各道的权重，由加权平均得出所测空间点的温度。

  8. Te BY THOMSON SCATTERING

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