 ...
 
 &APERTURE
  LApert = T
  
  File_Aperture(1) = 'Rad'                                                                             
  Ap_Z1(1) =  0.1000    , Ap_Z2(1) =  0.1200    
  Ap_R(1) =   1.500
  A_xoff(1)= 0.5E-3 
  
  
  File_Aperture(2)='RAD'
  Ap_Z1(2) = 0.19000    , Ap_Z2(2) =  0.200    
  Ap_R(2) =  -50.0
   
 /
 
 ...
 
Element 1: A circular aperture with 1.5 mm opening radius and 0.5 mm horizontal offset, extending from 10 cm up to 12 cm
Element 2: A beam stop (negative radius of 50 mm) at 19 cm.

 ...
 
 &APERTURE
  LApert = T
  
  File_Aperture(1) = 'Scr_X'                                                                             
  Ap_Z1(1) =  0.1000    , Ap_Z2(1) =  0.1100    
  Ap_R(1) =   2.000 
  
  
  File_Aperture(2)='Scr_Y'
  Ap_Z1(2) = 0.11000    , Ap_Z2(2) =  0.1200    
  Ap_R(2) =  3.0
   
 /
 
 ...

Two single sided scraper forming a 90 degree angle 
Element 1: A single sided planar scraper in X extending from 10 cm up to 11 cm with 2 mm opening.
Element 2: A single sided planar scraper in Y extending from 11 cm up to 12 cm with 3 mm opening.

...
 
 &APERTURE
  LApert = T
  
  File_Aperture(1) = 'Col_X'                                                                             
  Ap_Z1(1) =  0.1000    , Ap_Z2(1) =  0.1100    
  Ap_R(1) =   2.000 
  
  
  File_Aperture(2)='Col_Y'
  Ap_Z1(2) = 0.11000    , Ap_Z2(2) =  0.1200    
  Ap_R(2) =  3.0
   
 /
 
 ...
 
 
A rectangular aperture with 4 mm x 6 mm opening
Element 1: A double sided planar collimator in X extending from 10 cm up to 11 cm with 2 mm opening.
Element 2: A double sided planar collimator in Y extending from 11 cm up to 12 cm with 3 mm opening.

...

 &APERTURE
  LApert = T
  File_Aperture(1) = 'CIR'                                                                         
  Ap_Z1(1) = 0.0200    , Ap_Z2(1) =   0.02100
         
  Ap_GR(1,1) =  0.000
  Ap_GR(1,2) =  0.500
  
  Ap_GR(1,3) =  0.600
  Ap_GR(1,4) =  0.700
  
  Ap_GR(1,5) =  0.800
  Ap_GR(1,6) =  0.900
  
  Ap_GR(1,7) =  1.000
  Ap_GR(1,8) =  1.100
  
  Ap_GR(1,9) =  1.200
  Ap_GR(1,10) = 1.300
                                             
 /

...

Example of a circular grid aperture consisting of 5 rings. Longitudinal extension from 2 cm up to 2.1
cm, first ring from 0.0 to 0.5 mm, second ring from 0.6 to 0.7 mm, third ring from 0.8 to 0.9 mm
fourth ring from 1.0 to 1.1 mm, fifth ring from 1.2 to 1.3 mm.


...
 
 &APERTURE
  LApert = T  
  File_Aperture(1) = 'Geometry.dat'                                                                             
   
 /
 
 ...

Circular aperture defined by the table 'Geometry.dat'. The data of the table extend from 1.0E-4 m up
to 1.0 m and form the inner contour of an rf gun cavity and a beam tube. The data table can also be
red by fieldplot and lineplot.
