Impurity pinch from a ratchet process.
A ratchet-type average velocity is shown to appear for test particles moving in a stochastic potential and a magnetic field that is space dependent. This is a possible explanation for impurity behavior in tokamak plasmas.
Vlad
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Association EURATOM-MEdC Romania, NILPRP, MG-36, Magurele, Bucharest, Romania. madi@ifin.nipne.ro
Spineanu
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Benkadda
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