XGC-221: series of single particle simulations

Several single particle simulation has been run with different time step. The energy is preserved within 2% in the simulation for 200 ion transient times only when the time step is about 1e-3 of ion transient time (sml_dt=1.d-3). Figures below show energy as function of time

sml_dt=0.02

sml_dt=0.005

sml_dt=0.002

sml_dt=0.001

In these single particle simulations, the computation time with the FMCFM interface (fm_use=1)

real    20m15.682s
user    19m57.207s
sys     0m6.028s

is compared with the corresponding simulation without the FMCFM interface (fm_use=0)

real    2m0.557s
user    1m55.979s
sys     0m3.632s