interp_2D_profiles Subroutine

subroutine interp_2D_profiles(Y,ne,Te,Zeff,flag)
  !! @note Subroutine for interpolating the pre-computed, axisymmetric
  !! plasma profiles to the particles' position. @endnote
  REAL(rp), DIMENSION(:,:), ALLOCATABLE, INTENT(IN)      :: Y
  !! Particles' position in cylindrical coordinates,
  !! Y(1,:) = \(R\), Y(2,:) = \(\phi\), and Y(3,:) = \(Z\).
  REAL(rp), DIMENSION(:), ALLOCATABLE, INTENT(INOUT)     :: ne
  !! Interpolated background electron density !!\(n_e(R,Z)\).
  REAL(rp), DIMENSION(:), ALLOCATABLE, INTENT(INOUT)     :: Te
  !! Interpolated background electron temperature \(T_e(R,Z)\).
  REAL(rp), DIMENSION(:), ALLOCATABLE, INTENT(INOUT)     :: Zeff
  !! Interpolated effective charge number \(Z_{eff}(R,Z)\).
  INTEGER(is), DIMENSION(:), ALLOCATABLE, INTENT(INOUT)  :: flag
  !! Flag that indicates whether particles are followed in the
  !! simulation (flag=1), or not (flag=0).
  INTEGER                                                :: pp
  !! Particle iterator.
  INTEGER                                                :: ss
  !! Species iterator.

  if (Y(2,1).eq.0) then
     ss=1_idef
  else
     ss = size(Y,1)
  end if

!  write(6,'("Also R_buffer: ",E17.10)') Y(1,ss)
  
  !$OMP PARALLEL DO FIRSTPRIVATE(ss) PRIVATE(pp,ezerr) &
  !$OMP& SHARED(Y,ne,Te,Zeff,flag,profiles_2d)
  do pp=1_idef,ss
     if ( flag(pp) .EQ. 1_is ) then
        call EZspline_interp(profiles_2d%ne, Y(pp,1), Y(pp,3), ne(pp), ezerr)
        call EZspline_error(ezerr)

!        write(6,'("Also R_buffer: ",E17.10)') Y(pp,1)

        if (ezerr .NE. 0) then ! We flag the particle as lost
           flag(pp) = 0_is
        end if

        call EZspline_interp(profiles_2d%Te, Y(pp,1), Y(pp,3), Te(pp), ezerr)
        call EZspline_error(ezerr)

        call EZspline_interp(profiles_2d%Zeff, Y(pp,1), Y(pp,3), Zeff(pp), ezerr)
        call EZspline_error(ezerr)
     end if
  end do
  !$OMP END PARALLEL DO
end subroutine interp_2D_profiles