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

Technical Report · Wed Jan 15 00:00:00 EST 2003

DOI:https://doi.org/10.2172/809963· OSTI ID:809963

Kramer, G J; Sharapov, S E; Nazikian, R; Gorelenkov, N N; Budny, R; contributors, JET-EFDA

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.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 809963
• Report Number(s): PPPL-3768; TRN: US0302661
• Resource Relation: Other Information: PBD: 15 Jan 2003
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYCLOTRONS
HEATING
LOWER HYBRID CURRENT DRIVE
SHEAR
FLUCTUATIONS
MHD INSTABILITY
JET TOKAMAK