IRIP - Switch to do alpha particle ripple calculation.
0.0 
turned off
1.0 turned on
NTFCOIL - Number of toroidal field coils.
RTFCOIL - Major radius of outboard leg of TF coils (meters).
FDT - Fraction of ions that are DT fuel ions.
NPITCH - Number of pitch angles in velocity space examined for ripple loss.