&params
  dat_file = 'da.dat'

  ltt%lat_file = 'chess_arc_pretzel_20150106.lat'
  ltt%rfcavity_on = F

  dpz = 0, 0.005, 0.01
  da_param%min_angle = 0  
  da_param%max_angle = 3.1415926
  da_param%abs_accuracy = 1e-5
  da_param%x_init = 0.005
  da_param%y_init = 0.005
  da_param%n_turn = 1000
  da_param%n_angle = 37
/