Neoclassical Transport Caused by Collisionless Scattering across an Asymmetric Separatrix

Journal Article · Fri Oct 29 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.185003· OSTI ID:21467054

Dubin, Daniel H. E.; Driscoll, C F; Tsidulko, Yu A ^[1]

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1. Department of Physics, University of California, San Diego, La Jolla, California 92093 (United States)

Plasma loss due to apparatus asymmetries is a ubiquitous phenomenon in magnetic plasma confinement. When the plasma equilibrium has locally trapped particle populations partitioned by a separatrix from one another and from passing particles, the asymmetry transport is enhanced. The trapped and passing particle populations react differently to the asymmetries, leading to the standard 1/{nu} and {radical}({nu}) transport regimes of superbanana orbit theory as particles collisionally scatter from one orbit type to another. However, when the separatrix is itself asymmetric, particles can collisionlessly transit from trapped to passing and back, leading to enhanced transport.

• OSTI ID: 21467054
• Journal Information: Physical Review Letters, Vol. 105, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.105.185003; (c) 2010 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASYMMETRY
BANANA REGIME
CHARGED-PARTICLE TRANSPORT
NEOCLASSICAL TRANSPORT THEORY
ORBITS
PLASMA
PLASMA CONFINEMENT
CHARGED-PARTICLE TRANSPORT THEORY
CONFINEMENT
RADIATION TRANSPORT
TRANSPORT THEORY
TRAPPING