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Author Redi, M. H. ♦ Budny, R. V. ♦ McCune, D. C. ♦ Miller, C. O. ♦ White, R. B.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ ITER TOKAMAK ♦ PARTICLE LOSSES ♦ ALPHA PARTICLES ♦ PLASMA SIMULATION ♦ COLLISIONAL PLASMA ♦ SAWTOOTH OSCILLATIONS ♦ THERMONUCLEAR DEVICES ♦ MAGNETIC CONFINEMENT
Abstract Calculations of collisional stochastic ripple loss of alpha particles from the new 20 toroidal field (TF) coil International Thermonuclear Experimental Reactor (ITER) [{ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion} {ital Research} (International Atomic Energy Agency, Vienna, 1991), Vol. 3, p. 239] predict small alpha ripple losses, less than 0.4{percent}, close to the loss calculated for the full current operation of the earlier 24 TF coil design. An analytic fit is obtained to the ITER ripple data field demonstrating the nonlinear height dependence of the ripple minimum for D-shaped ripple contours. In contrast to alpha loss simulations for the Tokamak Fusion Test Reactor (TFTR) [Fusion Technol. {bold 21}, 1324 (1992)], a simple Goldston, White, and Boozer stochastic loss criterion [Phys. Rev. Lett. {bold 47}, 647 (1981)] ripple loss model is found to require an increased renormalization of the stochastic threshold {delta}{sub {ital s}}/{delta}{sub GWB}{approx_gt}1. Effects of collisions, sawtooth broadening, and reversal of the grad-{ital B} drift direction are included in the particle following simulations. {copyright} {ital 1996 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Department Princeton Plasma Physics Laboratory
Publisher Place United States
Journal Physics of Plasmas
Volume Number 3
Issue Number 8
Organization Princeton Plasma Physics Laboratory


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