Tearing Mode Stability of Evolving Toroidal Equilibria

Details Tearing Mode Stability of Evolving Toroidal Equilibria Tearing Mode Stability of Evolving Toroidal Equilibria

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppvp1053p&link_type=abstract

American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre

Physics

Plasma Physics

Scientific paper

There are a number of toroidal equilibrium (such as JSOLVER, ESC, EFIT, and VMEC) and transport codes (such as TRANSP, BALDUR, and TSC) in our community that utilize differing equilibrium representations. There are also many heating and current drive (LSC and TORRAY), and stability (PEST1-3, GATO, NOVA, MARS, DCON, M3D) codes that require this equilibrium information. In an effort to provide seamless compatibility between the codes that produce and need these equilibria, we have developed two Fortran 90 modules, MEQ and XPLASMA, that serve as common interfaces between these two classes of codes. XPLASMA provides a common equilibrium representation for the heating and current drive applications while MEQ provides common equilibrium and associated metric information needed by MHD stability codes. We illustrate the utility of this approach by presenting results of PEST-3 tearing stability calculations of an NSTX discharge performed on profiles provided by the TRANSP code. Using the MEQ module, the TRANSP equilibrium data are stored in a Fortran 90 derived type and passed to PEST3 as a subroutine argument. All calculations are performed on the fly, as the profiles evolve.

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