Alfvén wave excitation and single-pass ion cyclotron heating in a fast-flowing plasma

Akira Ando, Masaaki Inutake, Motoi Hatanaka, Kunihiko Hattori, Hiroyuki Tobari, Tsuyoshi Yagai

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Alfván wave excitation and ion heating experiments were performed in a fast flowing plasma. When rf waves in the ion cyclotron range of frequency were excited by right- and left-handed helically wound antennas, shear and compressional Alfván waves with azimuthal mode number m=-1 and m=+1, respectively were excited. The dispersion relations of the propagating waves were obtained experimentally and compared with the theoretical ones, including the Doppler effect of the plasma flow. Strong ion heating was observed in the fast-flowing plasma when rf waves were launched by the right-handed helically wound antenna in a magnetic beach configuration. The plasma thermal energy W⊥ and the ion temperature Ti drastically increased during the rf pulse. This large increase was observed under lower-density conditions, where the ratio of the ion cyclotron frequency to the ion-ion collision frequency becomes high. The resonance magnetic field was affected by the Doppler shift due to the fast-flowing plasma.

Original languageEnglish
Article number057103
JournalPhysics of Plasmas
Volume13
Issue number5
DOIs
Publication statusPublished - 2006 May

ASJC Scopus subject areas

  • Condensed Matter Physics

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