1996-9-27 , 	S. Terada;KEK


                  Proton Irradiation Plan (T363)
						
				                  
Purpose: In order to study a thermal property of the ATLAS silicon modules of 
a very large leakage current due to a heavy radiation damage, we would like to
irradiate the latest ATLAS silicon detectors with 8 GeV protons extracted 
in the EP1-A beam line at the N-counter hall.

Target fluence: 3.0 x 10e14/cm2 over 6.4 x 6.4 cm2

Expected exposure: 16 hours*

       *We assumed an extracted beam intensity would be  about 1.5 x 10e12 ppp 
    in every 3 seconds.

Materials and their thickness intercepting the beam at upstream of EP1-A: 

     Silicon detector (6.4cm x 6.4cm x 0.3mmt) x 8-------   0.024 X0
     Al foil (0.1mmt) + Mylar (0.1mmt)    ---------------   0.001 X0
                                                     Total: 0.025 X0

Schedule:
	 Nov. 18 (Tue.)  16:00 - 18:00; Setup the movable stage and silicon
			                samples in the EP1-A beam line
         Nov. 19-20 (Wed. - Thu.)  10:00 - 16:00; beam exposure 
				(move the materials into  the beam line 
				for the exposure)*
        Dec. 9  (Tue.)  16:00 - 17:00 ;Take out the silicons from EP1 area
			        and bring them to the radiation safety building.

     *No access to the beam area is required during the beam cycle
      since the materials will be brought into the beam line with 
      a remote controlled movable table.