Princeton Plasma Physics Laboratory (PPPL) Theory Seminar

We present a numerical procedure for modeling resonant response of energetic particles to waves in tokamaks. With Littlejohn Lagrangian for guiding center motion, we use the action-angle variables to simplify simulations of the fast ion dynamics to one dimensional. The transformation also involves construction of canonical straight field line coordinates, which render a Hamiltonian description of the guiding center motion. This module can be integrated with the modified MHD code AEGIS to simulate wave-particle interactions.