Sherwood 2015

Abstract Details

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A comparison of linear and nonlinear solutions of MHD equilibria in perturbed cylindrical geometry

Author: Stuart R Hudson
Requested Type: Poster Only
Submitted: 2015-01-19 09:44:33

Co-authors: J. Loizu

Contact Info:
Princeton Plasma Physics Lab
PO Box 451
Princeton, New Jersey   08543
United States

Abstract Text:
Calculating the plasma response to small, non-axisymmetric perturbations to the boundary is important for a variety of reasons, not least being the control of ELMs by RMP fields. In cylindrical geometry, the ideal, linear response is governed by the cylindrical exterior equation, which is a second-order ordinary differential equation and can be solved quickly and accurately numerically. Nonlinear solutions to the perturbed cylinder can be calculated using the Stepped Pressure Equilibrium Code (SPEC). Recently, SPEC has been modified to explicitly calculate the linear response aswell. Code verfication calculations will be presented between SPEC and the ideal cylindrical response. The conditions under which the nonlinear solution agrees with the linear solution will be discussed.

Please place my poster near that of Sam Lazerson's.

March 16-18, 2015
The Courant Institute, New York University