;Here is the table of the feature diameters (mm) for the attenuator disks.
;The diameters have been optimized to eliminate undesirable 
;interactions between the grid pitch and feature diameter, at least
;for the fundamental.  As the table shows, there are 4 different thick
;attenuator (A) configurations and 2 different thin attenuator (B) 
;configurations.

;GRID           THICK ATTEN, A            THIN ATTEN, B

  1             1.716  24.3  2.,22.,36.    6.743  17.1  2.0,14.,22
  2             1.716  24.3  2.,22.,36.    6.743  17.1  2.0,14.,22 
  3             1.716  24.3  2.,22.,36.    6.743  17.1  2.0,14.,22
  4             1.716  24.3  2.,22.,36.    6.743  17.1  2.0,14.,22
  5             1.940  24.3  2.5,18,36     6.743  17.1  2.0,14.,22
  6             1.716  24.3  2.,22.,36.    6.743  17.1  2.0,14.,22
  7             2.050  24.3  2.5,18,36     6.743  17.1 	2.0,14.,22  
  8             1.940  24.3  2.5,18,36     6.743  17.1 	2.0,14.,22
  9             3.360  24.3  4,18,36       6.150  17.1 	2.5,14.,22