Double-weight scheme for gyrokinetic simulation of electromagnetic instabilities in tokamaks

An application of recently developed perturbative particle simulation scheme for finite-$\beta $ plasmas in the presence of background inhomogeneities is presented. The scheme uses two delta-f weights carried by each particle to represent particles density and pressure. Use of separate weight to represent particle pressure allows to alleviate cancelation problem in finite-$\beta $ gyrokinetic simulations with fully kinetic electrons. Recently, we have successfully used the new double-weight scheme for simulation of linear tearing and drift-tearing modes, in both collisionless semi-collisional regimes in sheared slab and high-aspect ratio cylindrical cross-section tokamak geometries. Here, we present further development of this scheme which now includes effects of magnetic drifts for the simulation of linear semi-collisional micro-tearing (MTM) and kinetic ballooning (KBM) modes in realistic aspect ratio cylindrical cross-section tokamak using the modified turbulence code GTS.