光谱学与光谱分析 |
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The Reconstruction of Welding Arc 3D Electron Density Distribution Based on Stark Broadening |
ZHANG Wang1, 2, HUA Xue-ming1, 2*, PAN Cheng-gang1, 2, LI Fang1, 2, WANG Min1, 2 |
1. Welding Engineering Institute of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China 2. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract The three-dimensional electron density is very important for welding arc quality control. In the present paper, Side-on characteristic line profile was collected by a spectrometer, and the lateral experimental data were approximated by a polynomial fitting. By applying an Abel inversion technique, the authors obtained the radial intensity distribution at each wavelength and thus constructed a profile for the radial positions. The Fourier transform was used to separate the Lorentz linear from the spectrum reconstructed, thus got the accurate Stark width. And we calculated the electronic density three-dimensional distribution of the TIG welding arc plasma.
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Received: 2012-04-18
Accepted: 2012-07-05
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Corresponding Authors:
HUA Xue-ming
E-mail: xmhua@sjtu.edu.cn
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