| 光谱学与光谱分析 |
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| Characterization of Plasma Induced by Laser Effect on Coal Sample |
| ZHANG Gui-yin1, JI Hui1, LI Song-tao1, ZHENG Hai-ming2 |
| 1. School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China2. Department of Mechanical Engineering, North China Electric Power University, Baoding 071003, China |
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Abstract With the output of an OPG/OPA pumped by the third harmonic output 355 nm of a pulsed Nd·YAG laser as radiation source, the emission spectrum of laser induced coal sample plasma is created. The emission spectral line shows the character of Lorenz profile. So Stark broadening is the main widening way of this plasma system. The spatial distribution of the plasma temperature and electron density is measured from the intensity and Stark broadening of the spectral lines. It is found that in the direction from vertical to plasma luminous flame, both plasma temperature and electron density are symmetrically relative to the center. While in the direction of parallel to plasma luminous flame, they are asymmetrically relative to the center. Plasma temperature and electron density is maximized in the centre of the flame, and the emission intensity of the plasma in the centre is also strong. So we ought to collect the emission spectrum in the plasma centre when using the technique of spectroscopy for the diagnosis of plasma characteristics. It is also found that there is a dip in the centre of some spectral lines. This indicates that there exists strong self-absorption in the plasma. The appearance of self-absorption varies with laser wavelength. It is most obvious when the wavelength is near to the center of the profile, because the transition probability is the largest at the center of the profile. Both emission intensity and self-absorption increase with laser energy. These experimental results can be interpreted as the increase of the particle density with laser energy. Thus we ought to select spectral lines with no self-absorption when measuring the parameters of the plasma with the technique of laser spectroscopy. This can ensure higher detection accuracy.
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Received: 2015-01-31
Accepted: 2015-05-06
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Corresponding Authors:
ZHANG Gui-yin
E-mail: gyzhang65@aliyun.com
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[1] Syvilay D, Texier A, Arles A, et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2015, 103: 34.
[2] Agrosì G, Tempesta G, Scandale E, et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2014, 102: 48.
[3] Khater M A. Spectrochimica Acta Part B: Atomic Spectroscopy, 2013, 81: 1.
[4] Khumaeni A, Niki H, Fukumoto K. Current Applied Physics, 2011, 11: 423.
[5] Zhang L, Ma W G, Dong L, et al. Applied. Spectroscopy, 2011, 65(7): 790.
[6] Gondal M A, Dastageer A, Maslehuddin M, et al. Optics & Laser Technology, 2012, 44: 566.
[7] Haider A F, Rony M A, Lubna R S, et al. Optics & Laser Technology, 2011, 43: 1405.
[8] ZHANG Shan-shan, DU Chuan-mei, FANG Xia, et al(章姗姗, 杜传梅, 方 霞, 等). J. of Atomic and Molecular Physics(原子与分子物理学报)，2008, 25: 911.
[9] ZHANG Bao-hua, LIU Wen-qing, CUI Zhi-feng(张保华, 刘文清, 崔执凤). Chinese J. of Lasers(中国激光)，2008, 35(10): 1485.
[10] Diwakar P K, Hahn D W. Spectrochimica. Acta Part B: Atomic Spectroscopy, 2008, 63: 1038.
[11] Christian G Parigger, Lauren D Swafford, Alexander C，et al. Spectrochimica Acta Part B: Atomic Spectroscopy, 2014, 99: 28.
[12] NIST Atomic Spectra Database, http://physics.nist.gov/PhysRefData/Handbook/index.html.
[13] Bekefi G(G. 贝克菲). Principles of Laser Plasmas(激光等离子体原理). ZHUANG Guo-liang, CHU Cheng，Transl(庄国良, 楮 成，译). Shanghai: Shanghai Science and Technology Press(上海: 上海科学技术出版社), 1981. 324.
[14] FAN Juan-juan, HUANG Dan, WANG Xin, et al(樊娟娟，黄 丹，王 鑫, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2014, 34(12)：3183.
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