&synrad3d_parameters
  lattice_file     = 'bmad_L9A18A000-_MOVEREC.lat                        ' 
  wall_file        = 'synrad3d.wall'                          ! File specifying the vacuum chamber wall
  dat_file         = 'synrad3d.dat'                            ! For output
  reflect_file = ''            ! If not blank then create a photon reflections data file.
  lat_ele_file = 'lat_ele.dat' ! If not blank then create a lattice element data file.
  ix_ele_track_start   = 103   ! Radiation is produced from the *exit* end of this element...
  ix_ele_track_end     = 104   !  ... to the exit end of this element. -1 -> Go to the end of the lattice
  photon_direction     = 1     ! 1 = Forward generation, -1 = Backward generation.
  num_photons          = 100  ! Nominal number of unfiltered photons generated. 
  num_photons_per_pass = -1    ! Number of photons generated per pass. -1 => Use num_photons value.
  ds_step_min          = 0.01  ! Photons are generated at discrete points. 
                               !   Multipole photons can be generated at each point.
                               !   This is minimum distance between points.
  emit_a               = 0     ! Horiontal emit. If < 0 -> Use value from radiation integral calc.
  emit_b               = 0     ! Vertical emit.  If < 0 -> Use value from radiation integral calc.
  sig_pz               = 0     ! Sigma pz. If < 0 -> Use value from radiation integral calc.
  sr3d_params%allow_reflections = True  ! For testing purposes.
                               !    of photon before/after reflection coords.
  random_seed  = 123456        ! Random number seed. 0 -> Use sys clock.
  e_filter_min = 4
  surface_reflection_file = '' ! For custom reflection parameters.
/