!-------------------------------------------------------------------
!  sawnbi - apply effect of kadomtsev sawtooth on fast ion
!  population that was previously computed by pre_sawnbi.
!
!  call this routine to signal that a sawtooth has occurred.
!  that means that on the next call to nubeam, the pre-calculated
!  sawtooth operator will be applied.
!
subroutine sawnbi
  !
  !-------------------------------------------------------------------
  !  f90 modules...
  !
  use nbi_com
  !
  !-------------------------------------------------------------------
  !

  sawflag2 = .true.

  !
  return
end subroutine sawnbi
