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(TH/P1-13) Large-Scale Gyrokinetic Turbulence Simulations with Kinetic Electrons from the Summit Framework

S.E. Parker¹⁾, Y. Chen¹⁾, B.I. Cohen²⁾, A.M. Dimits²⁾, W.M. Nevins²⁾, D. Shumaker²⁾, V.K. Decyk³⁾, J.N. Leboeuf^3)
 
1) Department of Physics, University of Colorado, Boulder, Colorado, USA
²⁾ Lawrence Livermore National Laboratory, Livermore, California, USA
³⁾ Univ. of California, Los Angeles, California, USA

Abstract.   Results from gyrokinetic turbulence simulations including electromagnetic perturbations and kinetic electrons in three-dimensional toroidal geometry with realistic tokamak plasma parameters are reported. This model includes electron-ion collisions and has been well benchmarked in the linear limit. It is found that for H-mode parameters, kinetic electrons increase the linear ITG growth rate and there is a corresponding decrease in the critical ion temperature gradient due to trapped-electron drive. However, a nonlinear up-shift in the critical gradient or a super-critical region still persists. The linear behavior of the zonal flow is little affected by kinetic electrons. This work is being carried out using the ``Summit Framework." Progress on Summit, an open-source framework for both local and global, massively parallel gyrokinetic turbulence simulations with kinetic electrons and electromagnetic perturbations, is reported.

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