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3D temperature measurement of tandem TIG arc plasma

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Abstract

Measurements of arc plasma are important for determining the associated physical properties. Such measurements usually involve spectroscopic techniques that measure the temperature distribution in free-burning arcs. Most existing studies have reported the temperature of axially symmetric arc plasma using Abel inversion. This method cannot be used for axially asymmetric arc plasma such as tandem tungsten inert gas (TIG) arc plasma. It is a complex phenomenon because the arc plasma generated from each electrode is affected by the plasma of the other due to electromagnetic force. We measured the temperature distribution of tandem TIG arc plasma in 3D with one camera rotation. The measurement method is based on computed tomography consisting of multidirectional detections and image reconstruction. As a result, we could measure the temperature distribution of the coupled arc plasma provided by the two-electrode TIG arc. In addition, we evaluated the influence of detection directions and numbers on the reconstructed emission intensity distribution.

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Authors and Affiliations

  1. Graduate school of engineering, Osaka University, Osaka, Japan

    Kazufumi Nomura, Takashi Kishi, Kentaro Shirai & Yoshinori Hirata

Authors
  1. Kazufumi Nomura
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  2. Takashi Kishi
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  3. Kentaro Shirai
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  4. Yoshinori Hirata
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Correspondence to Kazufumi Nomura.

Additional information

Doc. IIW-2380, recommended for publication by study group SG-212 "The Physics of Welding".

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Nomura, K., Kishi, T., Shirai, K. et al. 3D temperature measurement of tandem TIG arc plasma. Weld World 57, 649–656 (2013). https://doi.org/10.1007/s40194-013-0062-2

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  • DOI: https://doi.org/10.1007/s40194-013-0062-2

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