Session GP9: Poster Session III: Fundamental Theory and Modeling I; ITER and Magnetic Fusion Development; Plasma Confinement Configurations & Stellerator; ICF and HED Plasmas, Simulations, Hydrodynamic Instability

9:30 AM–9:30 AM, Tuesday, November 15, 2011
Room: Hall A


Abstract ID: BAPS.2011.DPP.GP9.74

Abstract: GP9.00074 : Linear gyrokinetic studies in NCSX and W7-X stellarators with the GS2 code

Preview Abstract

Authors:

  J.A. Baumgaertel
    (PPPL)

  W. Guttenfelder
    (PPPL)

  G.W. Hammett
    (PPPL)

  D.R. Mikkelsen
    (PPPL)

  P. Xanthopoulos
    (IPP Greifswald)

  J. Geiger
    (IPP Greifswald)

  W. Dorland
    (Univ. of Maryland, College Park)

  E. Belli
    (General Atomics)

The GS2 gyrokinetic code is being used to study microinstabilities and turbulence in non-axisymmetric flux-tube geometries. Non-axisymmetric systems, such as stellarators, have a number of interesting features, like natural reversed magnetic shear and a large number of shaping parameters. These offer possibilities for reducing microturbulence and improving performance. The NCSX and W7-X designs were partially optimized for neoclassical transport; however, the turbulent transport has not been studied in detail. We will present studies of gyrokinetic instabilities in NCSX and W7-X equilibria, including important geometry and linear benchmarks between GS2 and GENE, a gyrokinetic code from IPP. We will also discuss improvements to the GS2 trapped particle treatment and a new computational grid generator for GS2.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DPP.GP9.74