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The diffusion of fast ions in Ohmic TFTR discharges
Abstract
Short duration (20 msec) neutral deuterium beams are injected into the TFTR tokamak [Plasma Physics and Controlled Nuclear Fusion Research 1986 (IAEA, Vienna, 1987), Vol. I, p. 51]. The subsequent confinement, thermalization, and diffusion of the beam ions are studied with multichannel neutron and charge exchange diagnostics. The central fast-ion diffusion (<0.05 m 2/sec) is an order of magnitude smaller than typical thermal transport coefficients. © 1991 American Institute of Physics.
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