Modification of Probe Characteristics in a Supersonic Plasma Flow

• WATANABE Sho

  Department of Advanced Energy, University of Tokyo, Kashiwa 277-8561, Japan

• SAITOH Haruhiko

  Department of Advanced Energy, University of Tokyo, Kashiwa 277-8561, Japan

• YOSHIDA Zensho

  Department of Advanced Energy, University of Tokyo, Kashiwa 277-8561, Japan

Abstract

The effects of a supersonic plasma flow on emissive Langmuir probes were experimentally investigated using a Pockels electric field sensor. When the flow velocity exceeded the ion sound speed, the probe characteristics were modified, and the emissive probe overestimated the plasma potential. The modification of probe characteristics is explained by the formation of a humped potential profile, caused by a shock in the supersonic plasma flow.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 3 019-019, 2008

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• flowing plasma
• emissive Langmuir probe
• Pockels sensor
• shock wave
• electric field measurement

Details

• CRID: 1390001205253848704
• NII Article ID: 130000263901
• DOI: 10.1585/pfr.3.019
• ISSN: 18806821
• Web Site: http://www.jstage.jst.go.jp/article/pfr/3/0/3_0_019/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed