An alternative representation of an ideal magnetohydrodynamic equilibrium is developed. The representation is a variation of one given by A. Salat, Phys. Plasmas 2, 1652 (1995). The system of equations is used to study the possibility of non-symmetric equilibria in a topological torus, here an approximate rectangular parallelopiped, with periodicity in two of the three rectangular coordinates. An expansion is carried out in the deviation of pressure surfaces from planes. Resonances are manifest in the process. Nonetheless, provided the magnetic shear is small, it is shown that it is possible to select the magnetic fields and flux surfaces in such a manner that no singularities appear on resonant surfaces. One boundary surface of the parallelopiped is not arbitrary but is dependent on the equilibrium in question. A comparison of the solution sets of axisymmetric and non-axisymmetric equilibria suggests that the latter have a wider class of possible boundary shapes but more restrictive rotational transform profiles. No proof of convergence of the series is given.
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February 2014
Research Article|
February 27 2014
Ideal magnetohydrodynamic equilibrium in a non-symmetric topological torus
Harold Weitzner
Harold Weitzner
Courant Institute of Mathematical Sciences, New York University
, New York, New York 10012, USA
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Phys. Plasmas 21, 022515 (2014)
Article history
Received:
November 26 2013
Accepted:
February 18 2014
Citation
Harold Weitzner; Ideal magnetohydrodynamic equilibrium in a non-symmetric topological torus. Phys. Plasmas 1 February 2014; 21 (2): 022515. https://doi.org/10.1063/1.4867184
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