39 citations · 87 across the 7 of their papers we have counts for
7 papers
Mitigation of Initial Transients in Total-f Gyrokinetic Turbulence Simulations Using Neoclassically Relaxed Distribution Function
S. Ku, R. Hager, C. S. Chang +2
Total-f five-dimensional gyrokinetic simulations are essential for self-consistent studies of multiscale, multiphysics transport in the edge region of diverted tokamak plasmas. How…
A toroidally spectral field solver in the X-point Gyrokinetic Code for accurate simulation of reduced magneto-hydrodynamic modes
Robert Hager, C. S. Chang, Thomas Gade +5
A new field solver has been implemented in the global electromagnetic total- gyrokinetic particle-in-cell code XGC to extend the code's capability to large-scale reduced MHD-typ…
Broadening of the Divertor Heat Flux Profile in High Confinement Tokamak Fusion Plasmas with Edge Pedestals Limited by Turbulence in DIII-D
D. R. Ernst, A. Bortolon, C. S. Chang +16
Multi-machine empirical scaling predicts an extremely narrow heat exhaust layer in future high magnetic field tokamaks, producing high power densities that require mitigation. In t…
Simplicial Approximation of Deforming 3D Spaces for Visualizing Fusion Plasma Simulation Data
Congrong Ren, Hanqi Guo
We introduce a fast and invertible approximation for data simulated as 2D planar meshes with connectivities along the poloidal dimension in deforming 3D toroidal (donut-like) space…
Electromagnetic total-f algorithm for gyrokinetic particle-in-cell simulations of boundary plasma in XGC
Robert Hager, Seung-Hoe Ku, A. Y. Sharma +2
The simplified delta-f mixed-variable/pull-back electromagnetic simulation algorithm implemented in XGC for core plasma simulations by M. Cole et al. [Phys. Plasmas 28, 034501 (202…
Verification of long wavelength electromagnetic modes with a gyrokinetic-fluid hybrid model in the XGC code
Robert Hager, Jianying Lang, Choong-Seock Chang +4
As an alternative option to kinetic electrons, the gyrokinetic total-f particle-in-cell (PIC) code XGC1 has been extended to the MHD/fluid type electromagnetic regime by combining…
Kinetic modeling of divertor heat load fluxes in the Alcator C-Mod and DIII-D tokamaks
A. Y. Pankin, T. Rafiq, A. H. Kritz +8
The guiding-center kinetic neoclassical transport code, XGC0, [C.S. Chang et. al, Phys. Plasmas 11, 2649 (2004)] is used to compute the heat fluxes and the heat-load width in the o…