Spectral Characteristics of CN Radical (B→X) and Its Application in Determination of Rotational and Vibrational Temperatures of Plasma
PENG Zhi-Min1, DING Yan-Jun1**, ZHAI Xiao-Dong1, YANG Qian-Suo2, JIANG Zong-Lin2
1State Key Laboratory of Power Systems, Department of Thermal Engineering, Tsinghua University, Beijing 100084 2Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
Spectral Characteristics of CN Radical (B→X) and Its Application in Determination of Rotational and Vibrational Temperatures of Plasma
PENG Zhi-Min1, DING Yan-Jun1**, ZHAI Xiao-Dong1, YANG Qian-Suo2, JIANG Zong-Lin2
1State Key Laboratory of Power Systems, Department of Thermal Engineering, Tsinghua University, Beijing 100084 2Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
摘要The aim is to resolve the difficulties of measurement of temperature at several thousands of Celsius degrees for some unstable non-equilibrium gas flows. Based on the molecular spectroscopy theory and inherent molecular structure characteristics of the CN radical, the dependence of the spectral profile on the rotational temperature (RT), vibrational temperature (VT) and optical apparatus function are numerically explored within some certain ranges. Meanwhile, by comparing the numerically calculated spectra with the experimental spectra of the CN radical, the corresponding RT and VT of the plasma induced by the interaction of the laser pulse from an oscillated Nd:YAG laser with the coal target are determined, respectively. In addition, a short discussion on the thermodynamic state and the energy transfer process of the CN radical is also given.
Abstract：The aim is to resolve the difficulties of measurement of temperature at several thousands of Celsius degrees for some unstable non-equilibrium gas flows. Based on the molecular spectroscopy theory and inherent molecular structure characteristics of the CN radical, the dependence of the spectral profile on the rotational temperature (RT), vibrational temperature (VT) and optical apparatus function are numerically explored within some certain ranges. Meanwhile, by comparing the numerically calculated spectra with the experimental spectra of the CN radical, the corresponding RT and VT of the plasma induced by the interaction of the laser pulse from an oscillated Nd:YAG laser with the coal target are determined, respectively. In addition, a short discussion on the thermodynamic state and the energy transfer process of the CN radical is also given.
(Intensities and shapes of molecular spectral lines and bands)
引用本文:
PENG Zhi-Min;DING Yan-Jun**;ZHAI Xiao-Dong;YANG Qian-Suo;JIANG Zong-Lin
. Spectral Characteristics of CN Radical (B→X) and Its Application in Determination of Rotational and Vibrational Temperatures of Plasma[J]. 中国物理快报, 2011, 28(4): 44703-044703.
PENG Zhi-Min, DING Yan-Jun**, ZHAI Xiao-Dong, YANG Qian-Suo, JIANG Zong-Lin
. Spectral Characteristics of CN Radical (B→X) and Its Application in Determination of Rotational and Vibrational Temperatures of Plasma. Chin. Phys. Lett., 2011, 28(4): 44703-044703.
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