Symmetric and asymmetric evaluation of the Tokamap in comparison with direct symplectic integration.
Comparing the Poincare plots of the Tokamap and the underlying Hamiltonian system reveals large differences. This stems from the particular choice of evaluation of the singular perturbations present in the system (a series of delta functions). A symmetric evaluation approach is proposed and shown to yield results that almost perfectly match the Hamiltonian system.
Eberhard
Marc
M
Aston University, Birmingham, B4 7ET, United Kingdom. m.a.eberhard@aston.ac.uk