Noncircular triangularity and ellipticity-induced alfvén eigenmodes observed in JT-60U

G. J. Kramer; M. Saigusa; T. Ozeki; Y. Kusama; H. Kimura; T. Oikawa; K. Tobita; G. Y. Fu; C. Z. Cheng

doi:10.1103/PhysRevLett.80.2594

Noncircular triangularity and ellipticity-induced alfvén eigenmodes observed in JT-60U

G. J. Kramer, M. Saigusa, T. Ozeki, Y. Kusama, H. Kimura, T. Oikawa, K. Tobita, G. Y. Fu, C. Z. Cheng

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

For the first time noncircular triangularity induced Alfvén eigenmodes (NAE) were observed in combined ion cyclotron resonance frequency and neutral beam injection heated plasmas. Ellipticity induced Alfvén eigenmodes (EAE) and toroidicity-induced Alfvén eigenmodes (TAE) were also observed in those plasmas. The threshold beta of the energetic ions for exciting the NAE modes was found to be similar to that for exciting TAE modes.

Original language	English
Pages (from-to)	2594-2597
Number of pages	4
Journal	Physical Review Letters
Volume	80
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.80.2594
Publication status	Published - 1998

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10.1103/PhysRevLett.80.2594

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title = "Noncircular triangularity and ellipticity-induced alfv{\'e}n eigenmodes observed in JT-60U",

abstract = "For the first time noncircular triangularity induced Alfv{\'e}n eigenmodes (NAE) were observed in combined ion cyclotron resonance frequency and neutral beam injection heated plasmas. Ellipticity induced Alfv{\'e}n eigenmodes (EAE) and toroidicity-induced Alfv{\'e}n eigenmodes (TAE) were also observed in those plasmas. The threshold beta of the energetic ions for exciting the NAE modes was found to be similar to that for exciting TAE modes.",

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T1 - Noncircular triangularity and ellipticity-induced alfvén eigenmodes observed in JT-60U

AU - Kramer, G. J.

AU - Saigusa, M.

AU - Ozeki, T.

AU - Kusama, Y.

AU - Kimura, H.

AU - Oikawa, T.

AU - Tobita, K.

AU - Fu, G. Y.

AU - Cheng, C. Z.

PY - 1998

Y1 - 1998

N2 - For the first time noncircular triangularity induced Alfvén eigenmodes (NAE) were observed in combined ion cyclotron resonance frequency and neutral beam injection heated plasmas. Ellipticity induced Alfvén eigenmodes (EAE) and toroidicity-induced Alfvén eigenmodes (TAE) were also observed in those plasmas. The threshold beta of the energetic ions for exciting the NAE modes was found to be similar to that for exciting TAE modes.

AB - For the first time noncircular triangularity induced Alfvén eigenmodes (NAE) were observed in combined ion cyclotron resonance frequency and neutral beam injection heated plasmas. Ellipticity induced Alfvén eigenmodes (EAE) and toroidicity-induced Alfvén eigenmodes (TAE) were also observed in those plasmas. The threshold beta of the energetic ions for exciting the NAE modes was found to be similar to that for exciting TAE modes.

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U2 - 10.1103/PhysRevLett.80.2594

DO - 10.1103/PhysRevLett.80.2594

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VL - 80

SP - 2594

EP - 2597

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

ER -

Noncircular triangularity and ellipticity-induced alfvén eigenmodes observed in JT-60U

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