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Low-Z impurity transport in tokamaks
Nuclear Fusion, 1979Low-Z impurity transport in tokamaks was simulated with a one-dimensional impurity transport model including both neoclassical and anomalous transports. The neoclassical fluxes are due to collisions between the background plasma and impurity ions as well as to collisions between the various ionization states.
R.J. Hawryluk +2 more
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Transport Through Artificial Kondo Impurities
2001We report an experiment performed on a few-electron quantum dot in which the quantum numbers of the occupied electron states can be precisely identified. Besides the usual Kondo behavior for spin=l/2 and odd electron number, an unexpected Kondo effect is observed for an even electron number.
S. De Franceschi +5 more
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Impurity transport in ITER-like plasmas
Physics of Plasmas, 2006Neoclassical impurity transport is compared with transport calculated from the reactive drift wave model of turbulent transport for an ITER-like [R. Aymar, P. Barabaschi, and Y. Shimomura, Plasma Phys. Controlled Fusion 44, 519 (2002)] scenario. The turbulent transport is inward for both main ions and impurities, but the impurity ion inward transport ...
T. Fülöp, J. Weiland
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Impurity asymmetries and radial transport produced by asymmetric impurity sources
Nuclear Fusion, 1987A fluid theory is presented for the effects of poloidal asymmetries in impurity sources upon the poloidal asymmetry over the flux surface of the impurity density and upon radial impurity transport in tokamak plasmas. Poloidal locations of limiters which would minimize inward impurity transport are identified.
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Impurity transport in ASDEX Upgrade
2003In the core of a burning fusion plasma, the contamination by impurities has to be kept below a critical level. Understanding and control of impurity transport and accumulation are thus an essential issue. Impurity injection experiments have been performed to determine the impurity transport coefficients in the core and in the steep gradient region of H-
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Impurity transport across magnetic flux surfaces
2023Katsumi Ida, Naoki Tamura
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