Bulletin of the American Physical Society
49th Annual Meeting of the Division of Plasma Physics
Volume 52, Number 11
Monday–Friday, November 12–16, 2007; Orlando, Florida
Session CP8: Poster Session II: Reconnection and Non-Neutral I; Spheromaks and MCX; MFC Diagnostics; Simulation: Algorithm; Simulation: Kinetic/Edge
Monday, November 12, 2007
Rosen Centre Hotel Room: Grand Ballroom, 2:00pm - 5:00pm
Abstract ID: BAPS.2007.DPP.CP8.37
Abstract: CP8.00037 : Linear MHD Stability Analysis of the SSPX Spheromak*
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(Lawrence Livermore National Lab, Livermore, CA)
(General Atomics, San Diego, CA)
(University of Wisconsin, Madison, WI)
Good correlation between the toroidal mode numbers of measured magnetic fluctuations in high temperature SSPX plasmas and presence of low-order rational surfaces in the reconstructed q profiles, suggests that the quality of magnetic surfaces in SSPX is sufficiently good for applying standard linear MHD stability analyses. Previously we have reported on benchmarking the code NIMROD against GATO, with good agreement in growth rates for ideal-MHD internal kinks and an external kinks with no current on open field lines (for equilibria imported from the code Corsica). Recent stability analyses also show that presence of low order rational surfaces causes internal modes to become unstable. We will report on the progress in applying these tools for assessing beta limits in SSPX, using NIMROD analyses including current on open field lines and for comparison with experiments.
*Work performed at UC Lawrence Livermore National Laboratory under the auspices of US Department of Energy Contract No. W-7405-ENG-48.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.DPP.CP8.37
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