load_ky_bpar Subroutine

  subroutine load_ky_bpar(g1, bpar)
    use theta_grid, only: ntgrid
    use gs2_layouts, only: g_lo, ik_idx, it_idx, is_idx
    use dist_fn_arrays, only: vperp2, aj1
    use species, only: spec
    use run_parameters, only: has_bpar, fbpar
    use kt_grids, only: aky
    use constants, only: zi
    implicit none
    complex, dimension (-ntgrid:,:,g_lo%llim_proc:), intent (in out) :: g1
    complex, dimension (-ntgrid:,:,:), intent (in) :: bpar
    complex, dimension(-ntgrid:ntgrid) :: fac
    integer iglo, it, ik, is

    if (.not. (include_bpar .and. has_bpar)) return

    ! Is this factor of two from the old normalization?

    !$OMP PARALLEL DO DEFAULT(none) &
    !$OMP PRIVATE(iglo, it, ik, is, fac) &
    !$OMP SHARED(g_lo, g1, aky, aj1, vperp2, spec, bpar, fbpar) &
    !$OMP SCHEDULE(static)
    do iglo = g_lo%llim_proc, g_lo%ulim_proc
       it = it_idx(g_lo,iglo)
       ik = ik_idx(g_lo,iglo)
       is = is_idx(g_lo,iglo)
       fac =  zi*aky(ik)*aj1(:,iglo) &
            *2.0*vperp2(:,iglo)*spec(is)%tz*bpar(:,it,ik)*fbpar
       g1(:,1,iglo) = g1(:,1,iglo) + fac
       g1(:,2,iglo) = g1(:,2,iglo) + fac
    end do
    !$OMP END PARALLEL DO
  end subroutine load_ky_bpar