Geodesic acoustic mode spectroscopy II

Sanae I. Itoh, Seiya Nishimura, Kimitaka Itoh, Akihide Fujisawa, Yoshihiko Nagashima, Shigeru Inagaki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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.

Original languageEnglish
Article number014
JournalPlasma and Fusion Research
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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