Анотація:
Ripples in magnetic or electrostatic confinement fields give rise to trapping separatrices, and the conventional neoclassical helical ripple transport describes phenomena coming from the collisional trapping/detrapping of particles in the helical ripple wells. Our experiments and novel theory have now characterized a new kind of neoclassical transport processes arising from chaotic (collisionless) separatrix crossings, which occur due to equilibrium E×B plasma rotation along poloidally asymmetric (ruffled) separatrices, and due to wave-induced separatrix modulations.