Recent upgrading of ECRH system and studies to improve ECRH performance in the LHD

Lhd Experiment Group

    Research output: Contribution to journalConference articlepeer-review

    6 Citations (Scopus)

    Abstract

    This paper reports the recent status of the ECRH system in the LHD and introduces the experimental results that suggest the reasonable effects of the wave-plasma interaction in the plasma boundary including outside the LCFS. With increasing the available ECRH power, ECRH/ECCD have been performed in higher density target plasmas where the mode coupling between the O-mode and the X-mode caused by the magnetic shear occurs for long distance in the low density region of the plasma boundary including the ergodic layer outside the LCFS. In such a case, the incident polarization should be set by taking into account the mode coupling effect. Moreover, the refraction in the boundary region should be considered for accurate numerical prediction of the wave trajectory and power absorption with use of the ray-tracing calculation.

    Original languageEnglish
    Article number02011
    JournalEPJ Web of Conferences
    Volume87
    DOIs
    Publication statusPublished - Mar 12 2015
    Event18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2014 - Nara, Japan
    Duration: Apr 22 2014Apr 25 2014

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

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