Statistics – Computation
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.s1003h&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #S1.003
Statistics
Computation
Scientific paper
Advances in computational analysis have made it possible to simulate toroidal MHD equilibrium and stability, including physics outside of the MHD description, with a high degree of precision. Such simulations have recently begun to explore the interaction between non-Maxwellian particle distributions and resistive MHD stability. This project consists of an analysis of the interaction of a slowing down distribution of energetic particles with a m/n=2/1 resistive instability as a function of varying aspect ratio. Using the TOQ, PEST-III and NIMROD codes we initially characterize the MHD stability of the 2/1 mode without particles, and examine the particle effects with the NIMROD code. The equilibrium has a circular cross section and a Bessel function current derived from a linear perturbation in flux, allowing comparison to an analytic result at infinite aspect ratio. Methods and motivations for developing energetic particle effects into the PEST-III code are also discussed.
Brennan Dylan
Halfmoon Michael
Kim Charlson
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