title: Chaotic neoclassical separatrix dissipation in parametric drift-wave decay.
abstract: Experiments and theory characterize a parametric decay instability between plasma drift waves when the nonlinear coupling is modified by an electrostatic barrier. Novel mode coupling terms representing enhanced dissipation and mode phase shifts are caused by chaotic separatrix crossings on the wave-ruffled separatrix. Experimental determination of these coupling terms is in broad agreement with new chaotic neoclassical transport analyses.
authors.affiliation: Department of Physics, University of California at San Diego, La Jolla, California 92093, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Kabantsev
authors.affiliation: Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia.
authors.forename: Yu A
authors.initials: YA
authors.lastname: Tsidulko
authors.affiliation: Department of Physics, University of California at San Diego, La Jolla, California 92093, USA.
authors.forename: C F
authors.initials: CF
authors.lastname: Driscoll