Diode laser induced fluorescence spectroscopy of an optically thick plasma in combination with laser absorption spectroscopy
Diode laser induced fluorescence spectroscopy of an optically thick plasma in combination with laser absorption spectroscopy
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光学厚等离子体的二极管激光诱导荧光光谱与激光吸收光谱相结合
DOI：
10.1155/2013/198420
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发表时间：
2013
影响因子：
2
通讯作者：
and Y. Arakawa
中科院分区：
文献类型：
--
作者：
S. Nomura;T. kaneko;G. I to;K. Komurasaki;and Y. Arakawa
结合氩等离子体流中的激光吸收光谱，校正了由于光学吸收和饱和展宽引起的激光诱导荧光轮廓的失真。在高探测激光强度下，测量饱和吸收曲线以校正探测激光吸收。在低激光强度下，测量非饱和吸收曲线以校正荧光重吸收。使用饱和与非饱和展宽的比率来校正测量点处的饱和展宽。未校正时观测到的 LIF 展宽和相应的平移温度分别为 2.20±0.05 GHz 和 2510±100 K，校正后的展宽和温度分别为 1.96±0.07 GHz 和 1990±150 K。虽然这种校正仅适用于对称中心，但推导的温度与 Abel 的 LAS 获得的温度非常吻合反转。
Distortion of laser‐induced fluorescence profiles attributable to optical absorption and saturation broadening was corrected in combination with laser absorption spectroscopy in argon plasma flow. At high probe‐laser intensity, saturated absorption profiles were measured to correct probe‐laser absorption. At low laser intensity, nonsaturated absorption profiles were measured to correct fluorescence reabsorption. Saturation broadening at the measurement point was corrected using a ratio of saturated to non‐saturated broadening. Observed LIF broadening and corresponding translational temperature without correction were, respectively, 2.20±0.05 GHz and 2510±100 K and corrected broadening and temperature were, respectively, 1.96±0.07 GHz and 1990±150 K. Although this correction is applicable only at the center of symmetry, the deduced temperature agreed well with that obtained by LAS with Abel inversion.