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Experimental evidence of intermittent convection in the edge of magnetic confinement devices
Authors:Antar G Y  Krasheninnikov S I  Devynck P  Doerner R P  Hollmann E M  Boedo J A  Luckhardt S C  Conn R W
Institution:Fusion Energy Research Program, University of California-San Diego, 9500 Gilman Drive, La Jolla, California 92093-0417, USA.
Abstract:Probe measurements in the PISCES linear device indicate the presence of plasma radially far from where it is produced. We show that this is mainly caused by large-scale structures of plasma with high radial velocity. Data from the Tore Supra tokamak show striking similarities in the shape of these intermittent events as well as the fluctuation density probability distribution and frequency spectrum. The fact that intermittent, large-scale events are so similar in linear devices and tokamaks indicates the universality of convective transport in magnetically confined plasmas.
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