Change of electrical conductivity of Ar welding arc under resonant absorption of laser radiation
Change of electrical conductivity of Ar welding arc under resonant absorption of laser radiation
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激光辐射共振吸收下氩焊电弧电导率的变化
DOI：
10.1088/0022-3727/48/9/095502
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发表时间：
--
期刊：
影响因子：
--
通讯作者：
J. Hermsdorf
中科院分区：
文献类型：
--
作者：
R. Kozakov;B. Emde;A. V. Pipa;M. Huse;D. Uhrlandt;J. Hermsdorf
实验研究了氩弧焊电弧对激光共振吸收的影响。观察到激光入射高度与阳极之间电弧辐射强度的增加，以及由于激光束的存在而引起的电弧电压的变化。从不同方向的高速摄像机记录与绝对校准的光谱测量相结合，允许重建的三维发射系数分布，而无需假设轴对称。在局部热力学平衡的框架内评估所获得的数据。确定了由于激光的影响而导致的温度和电导率的局部增加。从光学测量中获得的电导率的变化与测量的电压降很好地吻合，并且特别是在阳极附近显示出电流密度分布的显著再分布。
Experimental investigations of the impact of resonant laser absorption by a tungsten inert gas welding arc in argon are presented. The intensity increase of the arc's radiation between the laser entrance height and the anode are observed, as well as the variation of arc voltage due to the presence of the laser beam. High-speed camera recordings from different directions combined with absolutely calibrated spectroscopic measurements allow the reconstruction of the three-dimensional emission coefficient profiles without the assumption of axial symmetry. The obtained data are evaluated within the framework of local thermodynamic equilibrium. The local increase in the temperature and conductivity due to the influence of the laser is determined. Changes in the electrical conductivity obtained from the optical measurements coincide well with the measured voltage drop, and show significant redistribution of the current density profile near the anode in particular.
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DOI：
10.6028/jres.076a.008
发表时间：
1972
期刊：
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry
影响因子：
--
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DOI：
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发表时间：
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期刊：
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影响因子：
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