Geodesic Acoustic Mode Spectroscopy II

Sanae-I. ITOH; Seiya NISHIMURA; Kimitaka ITOH; Akihide FUJISAWA; Yoshihiko NAGASHIMA; Shigeru INAGAKI

doi:10.1585/pfr.4.014

Rapid Communications

Geodesic Acoustic Mode Spectroscopy II

Sanae-I. ITOH, Seiya NISHIMURA, Kimitaka ITOH, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Shigeru INAGAKI

著者情報

キーワード: geodesic acoustic mode, ion acoustic mode, toroidal plasma, safety factor, new diagnostics, bicoherence

ジャーナルフリー

2009 年 4 巻 p. 014

DOI https://doi.org/10.1585/pfr.4.014

詳細

抄録

An extension of geodesic acoustic mode (GAM) spectroscopy [Plasma Phys. Control. Fusion 49, L7 (2007)] is proposed. The ratio between the lowest frequency of the co-existing ion acoustic mode (IAM) and the frequency of GAM enables us to identify the safety factor of toroidal plasmas. The lowest frequency can be detected by bispectrum analysis when both GAM and IAM are excited. The possibility of measuring the safety factor is discussed.

責任著者(Corresponding author)

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