title: Impurity pinch from a ratchet process.
abstract: 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.
authors.affiliation: Association EURATOM-MEdC Romania, NILPRP, MG-36, Magurele, Bucharest, Romania. madi@ifin.nipne.ro
authors.forename: M
authors.initials: M
authors.lastname: Vlad
authors.forename: F
authors.initials: F
authors.lastname: Spineanu
authors.forename: S
authors.initials: S
authors.lastname: Benkadda