Total-f Electromagnetic XGC in realistic diverted tokamak geometry *

The total-f gyro kinetic code XGC [1] has been making valuable discoveries across the magnetic separatrix in electrostatic modes, including L-H bifurcation dynamics, blob dynamics, diverter heat-load width physics, RMP physics, etc.  We report the total-f upgrade of the XGC capability to electromagnetic physics for the first time, while retaining all the total-f capabilities that self-consistently include neoclassical physics, turbulence physics, neutral particle recycling, heat and torque source, nonlinear Fokker-Planck collisions, logical sheath, etc.  The total-f electromagnetic capability to be reported here is based on the reduced delta-f algorithm utilizing the mixed-variable and pull-back transformation methods developed by Hatzky, Mishchenko,Kleiber et al., as described in Ref. [2].  Total-f electromagnetic algorithm and physically important total-f electromagnetic solutions will be presented.  We have also developed an implicit XGC version [3], which will not be the subject of this presentation.

 

[1] S. Ku et al., Phys. Plasmas 25, 056107 

[2] M.D.J. Cole, A. Mishchenko, A. Bottino, and C.S. Chang, Phys. Plasmas 28, 034501 (2021) 

[3] Benjamin Sturdevant, Phys. Plasmas 28, 072505 (2021)