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

Lhd Experiment Group

    Research output: Contribution to journalConference article

    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

    Fingerprint

    upgrading
    coupled modes
    plasma interactions
    ray tracing
    refraction
    trajectories
    shear
    polarization
    predictions

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

    Recent upgrading of ECRH system and studies to improve ECRH performance in the LHD. / Lhd Experiment Group.

    In: EPJ Web of Conferences, Vol. 87, 02011, 12.03.2015.

    Research output: Contribution to journalConference article

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    title = "Recent upgrading of ECRH system and studies to improve ECRH performance in the LHD",
    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.",
    author = "{Lhd Experiment Group} and Hiroe Igami and Shin Kubo and Takashi Shimozuma and Yasuo Yoshimura and Hiromi Takahashi and Shuji Kamio and Sakuji Kobayashi and Satoshi Ito and Yoshinori Mizuno and Kohta Okada and Ryohei Makino and Shinya Ogasawara and Kenya Kobayashi and Masaki Osakabe and Kazunobu Nagasaki and Hiroshi Idei and Hiroshi Idei",
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    AU - Kubo, Shin

    AU - Shimozuma, Takashi

    AU - Yoshimura, Yasuo

    AU - Takahashi, Hiromi

    AU - Kamio, Shuji

    AU - Kobayashi, Sakuji

    AU - Ito, Satoshi

    AU - Mizuno, Yoshinori

    AU - Okada, Kohta

    AU - Makino, Ryohei

    AU - Ogasawara, Shinya

    AU - Kobayashi, Kenya

    AU - Osakabe, Masaki

    AU - Nagasaki, Kazunobu

    AU - Idei, Hiroshi

    AU - Idei, Hiroshi

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