Collision and average velocity effects on the ratchet pinch

Vlad, M.; Spineanu, F.; Benkadda, S.
March 2008
Physics of Plasmas;Mar2008, Vol. 15 Issue 3, p032306
Academic Journal
A ratchet-type average velocity VR appears for test particles moving in a stochastic potential and a magnetic field that is space dependent. This model is developed by including particle collisions and an average velocity. We show that these components of the motion can destroy the ratchet velocity but they also can produce significant increase of VR, depending on the parameters. The amplification of the ratchet pinch is a nonlinear effect that appears in the presence of trajectory eddying.


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