Neoclassical Radial Electric Field and Transport with Finite Orbits

Journal Article · Mon Jul 30 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.055002· OSTI ID:40277269

Wang, W X; Hinton, F L; Wong, S K

Neoclassical transport in a toroidal plasma with finite ion orbits is studied, including for the first time the self-consistent radial electric field. Using a low-noise {delta}f particle simulation, we demonstrate that a deep electric-field well develops in a region with a steep density gradient, because of the self-collision--driven ion flux. We find that the electric field agrees with the standard neoclassical expression, when the toroidal rotation is zero, even for a steep density gradient. Ion thermal transport is modified by the electric-field well in a way which is consistent with the orbit squeezing effect, but smoothed by the finite orbits.

• Sponsoring Organization: (US)
• DOE Contract Number: FG03-95ER54309
• OSTI ID: 40277269
• Journal Information: Physical Review Letters, Vol. 87, Issue 5; Other Information: DOI: 10.1103/PhysRevLett.87.055002; Othernumber: PRLTAO000087000005055002000001; 068129PRL; PBD: 30 Jul 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC FIELDS
PLASMA
ROTATION
SIMULATION
TRANSPORT