Open AccessObservations of neutral beam and ICRF tail ion losses due to Alfven modes in TFTR
Author(s) -
D. Darrow,
S. J. Zweben,
Z. Chang
Publication year - 1996
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/231967
Subject(s) - ion , atomic physics , physics , amplitude , beam (structure) , mode (computer interface) , magnetohydrodynamics , ion beam , plasma , optics , nuclear physics , quantum mechanics , computer science , operating system
Fast ion losses resulting from MHD modes at the Alfven frequency, such as the TAE, have been observed in TFTR. The modes have been driven both by neutral beam ions, at low B{sub T}, and by H-minority ICRF tail ions at higher B{sub T}. The measurements indicate that the loss rate varies linearly with the mode amplitude, and that the fast ion losses during the mode activity can be significant, e.g. up to 10% of the input power is lost in the worst case
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