
               *******************
               ***  MANDATORY  ***
               *******************

 --- DETECTOR : do the following modifications to the
                previous ( 3_moreGeom/ ) detector:
 
      * Change the external radius of the cone from
        50 cm to 40 cm. Similarly, change the radius
        of the cylinder of Silicon from 50 cm to 40 cm.
            
      * Add a gap of 10 cm between the end of the cone of 
        lead and the cylinder of Silicon.

      * Change the thickness (full length of the cylinder
        along the x-axis) of the Silicon layer from 300 microns 
        to 500 microns.


