t core boundary
  cfniydbo=0.   # use to avoid artificial source at core boundary
  cfeeybbo=1.   # ditto
  cfeeydbo=0.   # ditto
  cfeixdbo=1.   # turn on BXgrad(T) drift in plate BC
  cfeexdbo=1.   # turn on diamagnetic drift in plate BC
  cftef=1.0     #turns on v2ce for toroidal velocity
  cftdd=1.0     #turns on v2dd (diamag vel) for toloidal velocity
  cfqym=1.0     #turns on inertial correction to fqy current
  iphibcc=0     # don't set extrapolation BC for Er at iy=0
  iphibcwi=0    # set ey=0 on in