Measurement of Single Pass Electron Cyclotron (EC) Absorption Using Transmitted Waves in Heliotron J

Kazunobu NAGASAKI; Takayuki TSUJI; Masatoshi NOSAKU; Nobuhide SHIMAZAKI; Tohru MIZUUCHI; Hiroyuki OKADA; Shinji KOBAYASHI; Kinzo SAKAMOTO; Zhen FENG; Katsumi KONDO; Masashi KANEKO; Gen MOTOJIMA; Shinya WATANABE; Alvaro CAPPA; Fumimichi SANO

doi:10.1585/pfr.2.039

Rapid Communications

Measurement of Single Pass Electron Cyclotron (EC) Absorption Using Transmitted Waves in Heliotron J

Kazunobu NAGASAKI, Takayuki TSUJI, Masatoshi NOSAKU, Nobuhide SHIMAZAKI, Tohru MIZUUCHI, Hiroyuki OKADA, Shinji KOBAYASHI, Kinzo SAKAMOTO, Zhen FENG, Katsumi KONDO, Masashi KANEKO, Gen MOTOJIMA, Shinya WATANABE, Alvaro CAPPA, Fumimichi SANO

著者情報

キーワード: electron cyclotron absorption, microwave transmission, oblique propagation, absorption efficiency, wave polarization, Heliotron J

ジャーナルフリー

2007 年 2 巻 p. 039

DOI https://doi.org/10.1585/pfr.2.039

詳細

抄録

Single pass absorption of second-harmonic EC waves propagating obliquely to the magnetic field has been studied in Heliotron J. Two orthogonal signals of transmitted high power EC waves are measured to estimate the single pass absorption rate. The experimental results agree well with ray tracing calculation results based on a linear absorption theory under the condition that the refraction effect is not strong, n_e/n_c < 0.3 (n_c is a cut-off density of second-harmonic X-mode), that is, the waves reach the diagnostic port.

責任著者(Corresponding author)

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