An Analysis of the Instability Phenomena of a Low current Vacuum Arc

• Morimiya Osami

  Nippon Institute of Technology

• Suzuki Setsuo

  Tosiba Corporation

• Watanabe Kenji

  Tosiba Corporation

Bibliographic Information

Other Title

• 小電流真空アークの不安定現象の解析
• ショウデンリュウ シンクウ アーク ノ フアンテイ ゲンショウ ノ カイセキ

Abstract

In order to clarify the instability phenomena of a low current vacuum arc, characterized by noise on the current trace prior to the actual current chopping, an analysis of copper cathode spot has been made. For the analysis, cathode spot region is recognized as the collisionless space charge sheath connected with singly ionizad collisional plasmas.<br>It is proposed that a current level below that no real solution exists is unstable current and this current corresponds to the point at which a vacuum arc turns into unstable.<br>It is found that there is no real solution when the current is below 25A. The physical explanation is considered that the electrons returning to the sheath region from the plasma one dominate over positive ions and, consequently, the electric field at the cathode surface is F₀²≤0 below 25A.

Journal

• IEEJ Transactions on Fundamentals and Materials

  IEEJ Transactions on Fundamentals and Materials 119 (2), 190-196, 1999

  The Institute of Electrical Engineers of Japan

Keywords

• 真空アーク
• 不安定
• 小電流
• 陰極点

Details

• CRID: 1390282679575992320
• NII Article ID: 10004441915
• NII Book ID: AN10136312
• DOI: 10.1541/ieejfms1990.119.2_190
• ISSN: 13475533
• ISSN: 03854205
• ISSN: http://id.crossref.org/issn/03854205
• ISSN: http://id.crossref.org/issn/13418939
• NDL BIB ID: 4645685
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4645685
• Web Site: https://www.jstage.jst.go.jp/article/ieejfms1990/119/2/119_2_190/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed