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Neoclassical reversed-field pinch equilibrium with dominant self-induced plasma current.
- Source :
- Physics of Plasmas; Aug2005, Vol. 12 Issue 8, p080702, 4p
- Publication Year :
- 2005
-
Abstract
- The neoclassical magnetohydrodynamic equilibrium of reversed-field pinch (RFP) is self-consistently solved considering the self-induced plasma current I<subscript>[lowercase_phi_synonym]</subscript><superscript>SI</superscript> in a reactor relevant parameter regime. The current I<subscript>[lowercase_phi_synonym]</subscript><superscript>SI</superscript> consists of bootstrap currents due to α particles as well as the bulk plasma, where the conventional neoclassical transport theory is applied without considering the finite banana-width effect, Pfirsch–Schluter current, and diamagnetic current. The neoclassical effect enhances I<subscript>[lowercase_phi_synonym]</subscript><superscript>SI</superscript> in a low-aspect-ratio RFP (aspect ratio A=2), when β is high. An I<subscript>[lowercase_phi_synonym]</subscript><superscript>SI</superscript> as high as 94.4% of the plasma current in the equilibrium with ellipticity κ=1.4 and triangularity δ=0.4 is obtained with a flat pressure profile, which provides a toroidal β of β<subscript>t</subscript>=63% (volume-averaged β, 〈β〉=66%) stable against both the ideal kink mode and Mercier mode. This dominant self-induced current makes the steady-state approach feasible. Its hollow current profile gives a strong magnetic shear and a high-stability β. [ABSTRACT FROM AUTHOR]
- Subjects :
- PLASMA gases
PINCH effect (Physics)
EQUILIBRIUM
PARTICLES (Nuclear physics)
PHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 1070664X
- Volume :
- 12
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Physics of Plasmas
- Publication Type :
- Academic Journal
- Accession number :
- 18133401
- Full Text :
- https://doi.org/10.1063/1.2001407