Kabantsev AA, Tsidulko YA, Driscoll CF. Chaotic neoclassical separatrix dissipation in parametric drift-wave decay.
PHYSICAL REVIEW LETTERS 2014;
112:055003. [PMID:
24580605 DOI:
10.1103/physrevlett.112.055003]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Indexed: 06/03/2023]
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.
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