プラズマ・核融合学会誌
Print ISSN : 0918-7928
79 巻, 6 号
選択された号の論文の6件中1~6を表示しています
Rapid Communications
講座 「トロイダルプラズマ輸送解析の基礎」
研究論文
  • Yoshio NAGAYAMA, Kazuo KAWAHATA, Shigeru INAGAKI, Shin KUBO, Kazumichi ...
    2003 年 79 巻 6 号 p. 601-607
    発行日: 2003年
    公開日: 2005/09/28
    ジャーナル フリー
    Electron cyclotron emission (ECE) diagnostics have been developed in the Large Helical Device (LHD). The ECE is transmitted from the antenna to the spectrometer for 80 m by means of a corrugated waveguide system, which has a small transmission loss (˜30%) in LHD. Although the field angle changes from −40 to +30 degrees on the sight-line of the ECE antenna, it has been observed that the polarization of ECE, which is determined at the plasma edge in LHD, is identical for all frequencies. Thus, the electron temperature profile can be measured using the second harmonic X-mode of ECE. The ECE measured by the Michelson is calibrated with a hot source in order to reduce noise. The ECE temperature measurement agrees well with the Thomson scattering measurement over a wide range of electron densities. The radiometer is cross-calibrated to the Michelson, and is employed for the study of fast phenomena such as internal transport barrier (ITB) formation. Tangentially emitted ECE, in addition to the normal ECE, is investigated in LHD in order to explore the potential of ECE diagnostics.
レビュー論文
  • Kimitaka ITOH, Sanae-I. ITOH, Atsushi FUKUYAMA, Masatoshi YAGI
    2003 年 79 巻 6 号 p. 608-624
    発行日: 2003年
    公開日: 2005/09/28
    ジャーナル フリー
    Progress in the theory of plasma turbulence and transport, in collaboration with simulation research and experimental observations, is explained, putting emphasis on the nonlinear instability mechanisms, interaction with meso-scale structures such as zonal flow, transition, and statistical properties. Examples include turbulent fluctuations screened by meso-scale fluctuations, turbulence transition induced by nonlinear interplay between different classes of turbulence, and statistical description and transition probabilities. The self-regulating mechanisms of global plasma structure and turbulence are addressed, and insights into the generation of improved confinement states are addressed. This progress in the understanding of turbulence and structure formation illustrates the advancement of the physics of plasma as an important branch of modern physics.
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