Measurement of the electron bernstein wave emission with one of the power transmission lines for ech in LHD

Hiroe Igami, Hiroshi Idei, Shin Kubo, Yasuo Yoshimura, Takashi Shimozuma, Hiromi Takahashi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Possibility of the measurement of radiated waves derived from the thermally emitted electron Bernstein wave (EBW) is numerically investigated based on the assumption of the super dense core (SDC) plasma generated in LHD. EBW that is thermally emitted in the electron cyclotron resonance (ECR) layer may couple with the electromagnetic wave and be emitted to the vacuum via the EBW-extraordinary-ordinary (B-X-O) mode conversion process. We consider the use of one of the transmission lines for electron cyclotron heating (ECH) in LHD as a receiving system of the emission. It is derived that the waves in the fundamental cyclotron frequency range are emitted as the EBW near their upper hybrid resonance (UHR) layer outside the last close flux surface (LCFS). On the other hand, waves in the second harmonics cyclotron frequency range are emitted in the core region. It means that successful measurement of waves of the second harmonic frequency range emitted from extremely high dense core plasma with setting an aim angle for receiving indicates a possibility of the second harmonic ECH by EBW in the core region with setting the same aim angle and the same polarization for launching.

    Original languageEnglish
    Pages (from-to)405-409
    Number of pages5
    JournalPlasma Science and Technology
    Volume13
    Issue number4
    DOIs
    Publication statusPublished - Aug 1 2011

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

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