FASTWAC for full wave current drive calculations

FASTWAC is a full wave code designed for fast wave current drive calculations in tokamaks. The 3-D structure of fast wave electric and magnetic field components in a tokamak is calculated similar to the FASTWA code algorithm. Numerical simulation of ohmic and bootstrap current is presented as well. The bootstrap current computed by using the Hirshman-Sigmar formulation. Rf driven current distribution is evaluated through the local power absorbed by electrons according to the Ehst-Karney expression for the current drive efficiency incorporating trapped particle effect. Special attention is paid to correct calculation of the power adsorbed by electrons through mechanisms of Landau damping, TTMP, and the cross-term effect. The current version of the FASTWAC code includes situations with the general ion cyclotron harmonic resonances located inside a plasma, and multiple plasma components and impurities with the different temperature and density profiles. Helicity and nonresonant rf driven currents are discussed which stresses importance of the wave polarization factor for driving a current in a tokamak. Numerical examples for parameters of Phaedrus-T and TPX tokamaks are presented