Evolution of the radial structure of a negative corona during its transformation into a glow discharge and a spark

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• 作者：Yu. S. Akishev (1)
  M. E. Grushin (1)
  V. B. Karal'nik (1)
  I. V. Kochetov (1)
  A. E. Monich (1)
  A. P. Napartovicgh (1)
  N. I. Trushkin (1)
• 刊名：Plasma physics reports
• 出版年：2003
• 出版时间：February 2003
• 年：2003
• 卷：29
• 期：2
• 页码：176-186
• 全文大小：187.4 KB
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• 作者单位：1. State Scientific Center of the Russian Federation Troitsk Institute of Innovation and Fusion Research Troitsk, Moscow oblast 142190 Russia Troitsk, Moscow oblast 142190 Russia
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Atoms, Molecules, Clusters and Plasmas
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-6938

文摘

With the proper stabilization of a negative corona, it is possible to increase the threshold current at which the corona discharge in the point-plane gap in air transforms into a spark. Then, in the current range corresponding to the transition region between the corona discharge and the spark, a new type of discharge arises—an atmospheric-pressure diffuse glow discharge. The transformation of the negative corona into a glow discharge and then into a spark is accompanied by the rearrangement of the discharge structure. The experiments show that, as the corona current increases, the radial current profile at the anode shrinks and the glow diameter near the anode increases. The radial profiles of the current and the corona glow during the transition to a glow discharge are measured. The longitudinal structure of the corona is computed using a 1.5-dimensional model that, unlike the other available models, includes gas ionization in the drift region of the corona. The experimental data are used to determine the effective cross section of the current channel at the anode. The radial glow profile near the anode is calculated using the measured current profile and assuming that the field profile is parabolic.