Pullback transformation in gyrokinetic electromagnetic simulations
  It is shown that a considerable improvement in the global gyrokinetic electromagnetic simulations can be achieved by a slight modification of the simulation scheme. The new scheme is verified, simulating a Toroidal Alfv\'en Eigenmode in tokamak geometry at low perpendicular mode numbers, the so-called "MHD limit". Also, an electromagnetic drift mode has been successfully simulated in a stellarator. 
Alexey Mishchenko, Axel K\"onies, Ralf Kleiber, Michael Cole
physics.plasm-ph