Open AccessObservation of new branch of toroidal Alfven eigenmodes in TFTR
Author(s) -
E. Fredrickson,
R. Budny,
Z. Chang
Publication year - 1995
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/219398
Subject(s) - toroid , physics , plasma , normal mode , toroidal and poloidal , mode (computer interface) , computational physics , atomic physics , nuclear physics , quantum mechanics , computer science , vibration , operating system
Experimental observations are presented of a new branch of the toroidal Alfven eigenmode spectrum during ICRF heating of plasmas on TFTR. The identification of the second branch is based largely on direct measurements of the toroidal mode numbers of the toroidal Alfven Eigenmodes, and by the differences in the time evolution of the frequency spectrum between the new branch and the original toroidal Alfven eigenmodes as reported by Taylor et al. Phys. Fluids B 5 2437 (1993). The new branch has so far only been observed in relatively low edge q(=4-4.5) plasmas
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