First Evidence for the Existence of Odd Toroidal Alfven Eigenmodes (TAEs) from the Simultaneous Observation of Even and Odd TAEs on the Joint European Torus | Zendy

G.J. Kramer | Zendy; S. E. Sharapov | Zendy; R. Nazikian | Zendy; Н. Н. Гореленков | Zendy; R. Budny | Zendy; Jet-Efda Contributors | Zendy

Open Access

First Evidence for the Existence of Odd Toroidal Alfven Eigenmodes (TAEs) from the Simultaneous Observation of Even and Odd TAEs on the Joint European Torus

Author(s) -

G.J. Kramer,

S. E. Sharapov,

R. Nazikian,

Н. Н. Гореленков,

R. Budny,

Jet-Efda Contributors

Publication year - 2003

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/809963

Subject(s) - torus , physics , toroid , shear (geology) , atomic physics , normal mode , plasma , cyclotron , population , ion , computational physics , mathematics , geometry , materials science , quantum mechanics , vibration , demography , sociology , composite material

Experimental evidence is presented for the existence of the theoretically predicted odd Torodicity-induced Alfven Eigenmode (TAEs) from the simultaneous appearance of odd and even TAEs in a normal shear discharge. The modes are observed in low central magnetic shear plasmas created by injecting lower hybrid current drive. A fast ion population was created by applying ion cyclotron heating at the high field side to excite the TAEs in the weak magnetic shear region. The odd TAEs were identified from their frequency, mode number, and timing relative to the even TAEs

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