Overdense Microwave Plasma Generation in a Negative-Permeability Space

• SAKAI Osamu

  Department of Electronic Science and Engineering, Kyoto University

• IIO Satoshi

  Department of Electronic Science and Engineering, Kyoto University

• NAKAMURA Yoshihiro

  Department of Electronic Science and Engineering, Kyoto University

抄録

High-power electromagnetic waves propagating in a negative-permeability space were investigated theoretically and experimentally, and they generated overdense plasmas successfully. Theoretical analysis predicted that high-density plasmas with negative permittivity can form via saddle-node bifurcations within an adequate electric field. To confirm theoretical predictions, using metamaterials with negative permeability achieved by magnetic resonances, we injected microwaves with several hundreds of watt into a waveguide filled with a low-pressure discharge gas. Langmuir probe measurement revealed that a generated plasma is well beyond the cutoff density for the wave frequency of 2.45 GHz, and indicated transition between positive-permittivity (low-electron-density) and negative-permittivity (overdense) states.

収録刊行物

• Plasma and Fusion Research

  Plasma and Fusion Research 8 (0), 1406167-1406167, 2013

  一般社団法人 プラズマ・核融合学会

キーワード

• microwave plasma
• metamaterial
• permeability
• refractive index
• bifurcation

詳細情報

• CRID: 1390001205254539776
• NII論文ID: 130003392951
• DOI: 10.1585/pfr.8.1406167
• ISSN: 18806821
• Web Site: https://www.jstage.jst.go.jp/article/pfr/8/0/8_1406167/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可