| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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
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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
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| Cite this article: |
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PENG Zhi-Min, DING Yan-Jun, ZHAI Xiao-Dong et al 2011 Chin. Phys. Lett. 28 044703 |
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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.
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| Keywords:
47.80.Fg
42.65.Re
33.70.-w
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Received: 18 July 2010
Published: 29 March 2011
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| PACS: |
47.80.Fg
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(Pressure and temperature measurements)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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33.70.-w
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(Intensities and shapes of molecular spectral lines and bands)
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