Application of intermediate frequency range fast wave to JIPP T-IIU and HT-2 plasmas

T. Watari, R. Kumazawa, T. Seki, A. Ando, Y. Oka, O. Kaneko, K. Adati, R. Ando, T. Aoki, R. Akiyama, Y. Hamada, S. Hidekuma, S. Hirokura, E. Kako, A. Karita, K. Kawahata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Fast waves well above the fundamental ion cyclotron frequency were applied to JIPP T-IIU and HT-2 tokamak plasmas to study current drive, electron heating and third harmonics ion cyclotron heating. In HT-2, up to 10 kA of plasma current was driven by a 100 MHz fast wave in the density range of (0.3-3) × 1018 m-3, which corresponds to one to ten times above the lower hybrid current drive density limit. In JIPP T-IIU, an efficient electron temperature increase was observed on application of 130 MHz fast waves in the density range of (2-3) × 1019 m-3, two orders of magnitude higher than the lower hybrid density limit. In a further, still higher density range of above 3 × 1019 m-3, the third harmonics cyclotron heating of the additionally heated target plasma yields a heating efficiency that is as high as that of fundamental harmonic heating.

Original languageEnglish
Title of host publicationProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res
PublisherPubl by IAEA
Pages763-768
Number of pages6
ISBN (Print)9201300913
Publication statusPublished - 1991 Jan 1
Externally publishedYes

Publication series

NameProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res

ASJC Scopus subject areas

  • Engineering(all)

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