ALPHA-PARTICLE-DRIVEN TOROIDAL ALFVEN EIGENMODES IN THE TOKAMAK FUSION TEST REACTOR

Authors
NAZIKIAN R FU GY BATHA SH BELL MG BELL RE BUDNY RV BUSH CE CHANG Z CHEN Y CHENG CZ DARROW DS EFTHIMION PC FREDRICKSON ED GORELENKOV NN LEBLANC B LEVINTON FM MAJESKI R MAZZUCATO E MEDLEY SS PARK HK PETROV MP SPONG DA STRACHAN JD SYNAKOWSKI EJ TAYLOR G VONGOELER S WHITE RB WONG KL ZWEBEN SJ
Citation
R. Nazikian et al., ALPHA-PARTICLE-DRIVEN TOROIDAL ALFVEN EIGENMODES IN THE TOKAMAK FUSION TEST REACTOR, Physical review letters, 78(15), 1997, pp. 2976-2979
Citations number
27
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
15
Year of publication
1997
Pages
2976 - 2979
Database
ISI
SICI code
0031-9007(1997)78:15<2976:ATAEIT>2.0.ZU;2-V
Abstract
Alpha-particle-driven toroidal Alfven eigenmodes (TAEs) have been obse rved for the first time in deuterium-tritium (D-T) plasmas on the toka mak fusion test reactor (TFTR). These modes are observed 100-200 ms fo llowing the end of neutral beam injection in plasmas with reduced cent ral magnetic shear and elevated central safety factor [q(0) > 1]. Mode activity is localized to the central region of the discharge (r/a < 0 .5) with magnetic fluctuation level <(B)over tilde (perpendicular to)> similar to 10(-5) and toroidal mode numbers in the range n = 2-4, con sistent with theoretical calculations of alpha-TAE stability in TFTR.