Observation of Odd Toroidal Alfvén Eigenmodes

Observation of Odd Toroidal Alfvén Eigenmodes

Observation of Odd Toroidal Alfvén Eigenmodes 150 150 Mathew

Observation of Odd Toroidal Alfvén Eigenmodes

Experimental evidence is presented for the existence of the theoretically predicted odd toroidicity induced Alfve?n eigenmode (TAE) from the simultaneous appearance of odd and even TAEs in a normal shear discharge of the joint European torus. 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. The odd TAEs were identified from their frequency, mode number, and timing relative to the even TAEs.

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08/01/2004