New regime of low ion collisionality in the neoclassical equilibrium of tokamak plasmas
Abstract
Here, the neoclassical description of an axisymmetric toroidal plasma equilibrium is formulated for an unconventionally low ordering of the collisionality that suits realistic thermonuclear fusion conditions. This requires a drift-kinetic analysis to the second order of the ion Larmor radius, which yields a new contribution to the leading solution for the non-Maxwellian part of the ion distribution function if the equilibrium geometry is not up-down symmetric. An explicit geometrical factor weighs this second Larmor-radius order, low-collisionality effect that modifies the neoclassical ion parallel flow, and the ion contribution to the bootstrap current.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1897964
- Alternate Identifier(s):
- OSTI ID: 1228714
- Grant/Contract Number:
- FG02-91ER54109; FC02-08ER54969; DEFC02-08ER54969; DEFG02-91ER54109
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 7; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Plasma confinement; Leptons; Collision frequency; Coordinate system; Plasma dynamics; Tokamaks; Electromagnetism; Integral calculus; Thermonuclear fusion; Asymptotic analysis
Citation Formats
Ramos, J. J. New regime of low ion collisionality in the neoclassical equilibrium of tokamak plasmas. United States: N. p., 2015.
Web. doi:10.1063/1.4927799.
Ramos, J. J. New regime of low ion collisionality in the neoclassical equilibrium of tokamak plasmas. United States. https://doi.org/10.1063/1.4927799
Ramos, J. J. Thu .
"New regime of low ion collisionality in the neoclassical equilibrium of tokamak plasmas". United States. https://doi.org/10.1063/1.4927799. https://www.osti.gov/servlets/purl/1897964.
@article{osti_1897964,
title = {New regime of low ion collisionality in the neoclassical equilibrium of tokamak plasmas},
author = {Ramos, J. J.},
abstractNote = {Here, the neoclassical description of an axisymmetric toroidal plasma equilibrium is formulated for an unconventionally low ordering of the collisionality that suits realistic thermonuclear fusion conditions. This requires a drift-kinetic analysis to the second order of the ion Larmor radius, which yields a new contribution to the leading solution for the non-Maxwellian part of the ion distribution function if the equilibrium geometry is not up-down symmetric. An explicit geometrical factor weighs this second Larmor-radius order, low-collisionality effect that modifies the neoclassical ion parallel flow, and the ion contribution to the bootstrap current.},
doi = {10.1063/1.4927799},
journal = {Physics of Plasmas},
number = 7,
volume = 22,
place = {United States},
year = {Thu Jul 30 00:00:00 EDT 2015},
month = {Thu Jul 30 00:00:00 EDT 2015}
}
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