Numerical Grad-Shafranov (GS) equilibria with negative current density in the plasma core are computed which do not impose any particularly chosen models for the pressure and current-density profiles. This flexibility allows the profiles to be tailored so that an island unfolds in the low-field side, even for elongated plasmas, thus sustaining the negative-current core against outward forces. Among other topological results, reversed GS equilibria are also shown to be necessarily non-nested, except for the cylindrical and other very special degenerate, hence structurally unstable cases.
Description
TCR equilibria with (almost) arbitrary $p'$ and $ff'$.
%0 Journal Article
%1 rodrigues.2005
%A Rodrigues, Paulo
%A Bizarro, João P. S.
%D 2005
%I American Physical Society
%J Phys. Rev. Lett.
%K JET current_hole current_reversal equilibrium i-mhd s_theory tokamak
%N 1
%P 015001
%R 10.1103/PhysRevLett.95.015001
%T Grad-Shafranov Equilibria with Negative Core Toroidal Current in Tokamak Plasmas
%U http://prl.aps.org/abstract/PRL/v95/i1/e015001
%V 95
%X Numerical Grad-Shafranov (GS) equilibria with negative current density in the plasma core are computed which do not impose any particularly chosen models for the pressure and current-density profiles. This flexibility allows the profiles to be tailored so that an island unfolds in the low-field side, even for elongated plasmas, thus sustaining the negative-current core against outward forces. Among other topological results, reversed GS equilibria are also shown to be necessarily non-nested, except for the cylindrical and other very special degenerate, hence structurally unstable cases.
@article{rodrigues.2005,
abstract = {Numerical Grad-Shafranov (GS) equilibria with negative current density in the plasma core are computed which do not impose any particularly chosen models for the pressure and current-density profiles. This flexibility allows the profiles to be tailored so that an island unfolds in the low-field side, even for elongated plasmas, thus sustaining the negative-current core against outward forces. Among other topological results, reversed GS equilibria are also shown to be necessarily non-nested, except for the cylindrical and other very special degenerate, hence structurally unstable cases.},
added-at = {2010-01-29T17:17:25.000+0100},
author = {Rodrigues, Paulo and Bizarro, João P. S.},
biburl = {https://www.bibsonomy.org/bibtex/23a064f8c60c65e0407991fbeb1e753d2/prodrigues},
description = {TCR equilibria with (almost) arbitrary $p'$ and $ff'$.},
doi = {10.1103/PhysRevLett.95.015001},
interhash = {2f701c99874ef128e7a76023f1fcf183},
intrahash = {3a064f8c60c65e0407991fbeb1e753d2},
journal = {Phys. Rev. Lett.},
keywords = {JET current_hole current_reversal equilibrium i-mhd s_theory tokamak},
month = {June},
number = 1,
numpages = {4},
pages = 015001,
publisher = {American Physical Society},
timestamp = {2010-01-29T17:17:25.000+0100},
title = {Grad-Shafranov Equilibria with Negative Core Toroidal Current in Tokamak Plasmas},
url = {http://prl.aps.org/abstract/PRL/v95/i1/e015001},
volume = 95,
year = 2005
}