&synrad_params
  sr_param%lat_file = "lat.bmad"   ! Input lattice.
  sr_param%i_beam = 0.1            ! Single-beam current. 
  sr_param%epsilon_y = 10e-12      ! Vertical emittance.
  sr_param%n_slice = 20            ! # of slices per element or wiggler pole
  seg_len = 0.1                    ! Segment length for calculation.
  beam_direction = 0               ! -1 = track backwards only, 
                                   !  0 = track both directions, 1 = forward.
  wall_file = "synrad.wall"        ! 
  forward_beam  = "POSITRON"       ! "POSITRON" or "ELECTRON"
  backward_beam = "ELECTRON"       !  This is important if there are elsep elements.
  use_ele_ix = 0   ! If using only a single element, this is the element index number to use
        ! Otherwise, use 0 for power from all elements
/