光谱学与光谱分析 |
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Study on the Distribution of Plasma Parameters in Electrodeless Lamp Using Emission Spectrometry |
WANG Chang-quan, ZHANG Gui-xin, WANG Xin-xin, SHAO Ming-song, DONG Jin-yang, WANG Zan-ji |
Department of Electrical Engineering, Tsinghua University, Beijing 100084, China |
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Abstract Electrodeless lamp in pear shape was ignited using inductively coupled discharge setup and Ar-Hg mixtures as working gas. The changes in electronic temperature and density with axial and radial positions at 5 s of igniting were studied by means of emission spectrometry. The changes in electronic temperature were obtained according to the Ar line intensity ratio of 425.9 nm/750.4 nm. And the variations in electronic density were analyzed using 750.4 nm line intensity. It was found that plasma electronic temperature and density is various at different axial or radial positions. The electronic temperatures first increase, then decrease, and then increase quickly, and finally decline. While the electronic density firstly increase quickly, the decrease, and then rise slowly and finally decline again with axial distance increasing. With radial distance increasing, electronic temperature increases to a stable area, then continues to rise, while electronic density decreases.
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Received: 2010-11-01
Accepted: 2011-03-25
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Corresponding Authors:
WANG Chang-quan
E-mail: wangchangquan@tsinghua.org.cn, wangchq48@163.com
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