First Observation of ECH by Electron Bernstein Waves Excited via X-B Mode Conversion Process in LHD

Hiroe IGAMI; Takashi SHIMOZUMA; Shin KUBO; Kazunobu NAGASAKI; Shigeru INAGAKI; Yasuo YOSHIMURA; Takashi NOTAKE; Kunizo OHKUBO; Takashi MUTOH; LHD experimental group

doi:10.1585/pfr.1.052

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First Observation of ECH by Electron Bernstein Waves Excited via X-B Mode Conversion Process in LHD

Hiroe IGAMI, Takashi SHIMOZUMA, Shin KUBO, Kazunobu NAGASAKI, Shigeru INAGAKI, Yasuo YOSHIMURA, Takashi NOTAKE, Kunizo OHKUBO, Takashi MUTOH, LHD experimental group

Author information

Hiroe IGAMI
National Institute for Fusion Science
Takashi SHIMOZUMA
National Institute for Fusion Science
Shin KUBO
National Institute for Fusion Science
Kazunobu NAGASAKI
Institute of Advanced Energy, Kyoto University
Shigeru INAGAKI
National Institute for Fusion Science
Yasuo YOSHIMURA
National Institute for Fusion Science
Takashi NOTAKE
National Institute for Fusion Science
Kunizo OHKUBO
National Institute for Fusion Science
Takashi MUTOH
National Institute for Fusion Science
LHD experimental group
National Institute for Fusion Science

Keywords: electron cyclotron heating, electron Bernstein wave, power modulation, FFT analysis

JOURNAL FREE ACCESS

2006 Volume 1 Pages 052

DOI https://doi.org/10.1585/pfr.1.052

Details

Abstract

In a magnetic field configuration of the Large Helical Device (LHD), when the extraordinary mode (X-mode) waves are obliquely injected from a bottom antenna, it can directly access the upper hybrid resonance (UHR) layer from the high field side and excite electron Bernstein waves (EBWs) without the need for any additional reflecting mirror antenna. A localized power absorption is observed in the low field side of the electron cyclotron resonance (ECR) layer. This result suggests electron cyclotron heating (ECH) by mode converted EBWs excited via X-B mode conversion process.

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