& IAM Input File - 4 Tubes
& 40 Characters of Heading
4 Tube Collector with Diffuse Reflector
& num_photons  nplost_max  num_ploops     seed0      tol
    10000        10           100           0        0.01
& n_long is the # of longitudinal incident angles
& n_tran is the # of transverse incident angles
& n_long n_tran num_cyls num_surfaces    num_mats_surf   num_mats_glass
     5     10       4          0               2               1
&  iprint   iprint_ran  idebug  idata  iglass
     0          0         0       0      1
&  ---- Aperture plane --- cornerpoints
&  xmina  xmaxa  ymina  ymaxa
   -100.   100.   -40.    40.
& ----- Backplane ------
& xminb  xmaxb  yminb  ymaxb  matnob
  -105.   105.  -40.1   40.1    2
& incident angles
& n   thetal(longitudinal)
  1     00.          
  2     20.
  3     40.
  4     60.
  5     80.
& n   thetat(transverse)
  1     00.
  2     05.
  3     10.
  4     20.
  5     30.
  6     40.
  7     50.
  8     60.
  9     70.
 10     80.
& cylinders
& n    x0    y0   z0   length_cyl   ro    ri    beta  matno_glass matno_cyli
  1   100. -30.0 12.0     200.     6.3   5.5     0.       1           1
  2   100. -10.0 12.0     200.     6.3   5.5     0.       1           1
  3   100.  10.0 12.0     200.     6.3   5.5     0.       1           1
  4   100.  30.0 12.0     200.     6.3   5.5     0.       1           1
& Materials
& Surface Materials from 1 to num_mats_surf
& n  rho_s   rho_ss   rho_d   r_ss   r_d
  1   0.       0.      0.1      0.    0.
  2   0.0      0.0     0.7      0.    1.
&  Glass Materials from 1 to num_mats_glass
& n   n_glass    k_glass      t
  1     1.5        0.13      0.2