title: Observation of odd toroidal Alfvén eigenmodes.
abstract: Experimental evidence is presented for the existence of the theoretically predicted odd toroidicity induced Alfvén 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.
authors.affiliation: Princeton Plasma Physics Laboratories, PO Box 451, Princeton, New Jersey 08543, USA. gkramer@pppl.gov
authors.forename: G J
authors.initials: GJ
authors.lastname: Kramer
authors.forename: S E
authors.initials: SE
authors.lastname: Sharapov
authors.forename: R
authors.initials: R
authors.lastname: Nazikian
authors.forename: N N
authors.initials: NN
authors.lastname: Gorelenkov
authors.forename: R V
authors.initials: RV
authors.lastname: Budny