From:	KEKVAX::TERADA       26-MAR-1997 18:47:16.49
To:	CHIBAJ
CC:	MINORU,BANPAKU,YAMANOI,OHSUGI,IWATAY,NUMAJIRI,KONDO,UNNO,KOHRIKI,TERADA
Subj:	Beam request for a p-irradiation (T363)

Dear Chiba-san,

We would like to carry out a proton irradiation on silicon samples
in the coming beam cycle. Outline of our irradiation plan is described in 
the following. We believe the materials intercepting the beam is very small
and the exposure time is short, so they don't cause any effect on the other 
experiments.

With best regards, 
Susumu Terada
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                         																																																																				1996-9-27 , 	S. Terada;KEK
                  Proton Irradiation Plan (T363)
						
				                  
Purpose: To study characteristics of a leakage current induced by a heavy 
radiation with high energy protons and also to verify radiation hardness 
of the most updated design of  ATLAS and CDF SVX-II silicon strip detectors.
To study radiation effects on a low mass Kapton flexible printed circuit
to be used for the ATLAS and CDF silicon detector read out electronics.

Target fluences:
	i) Low fluence run:   0.5 x 10e14/cm2 over 6 x 6 cm2
	ii) High fluence run: 3.0 x 10e14/cm2 over 6 x 6cm2

Expected exposure time:
	i)  Low fluence run:   2.5 hour.  
	ii) High fluence run : 15 hours
		------------------
                   Total : 17.5 hours

	We assumed an extracted beam intensity would be  about 1.5 x 10e12 ppp 
    in every 4 seconds.

Materials and their thickness intercepting the beam at upstream of EP1-A: 
 1. For low fluence exposure;
     Silicon detector (6cm x 6cm x 0.3mmt) ------------- 1   0.003 X0
     Al foil (0.1mmt) + Mylar (0.1 mmt)   -------------- 1   0.001 X0
                                                     Total:  0.004 X0
 2. For high fluence exposure;
     Silicon detector (6cm x 6cm x 0.3mmt) ------------- 3   0.009 X0
     Kapton flexible PC (6.0cm x 6cm x 0.05mmt)   ------ 6   0.006 X0
     Al foil (0.1mmt) + Mylar (0.1mmt)    -------------- 1   0.001 X0
                                                      Total: 0.016 X0

Schedule:
	 Apr. 8 (Tue.)  14:00 - 16:00; Setup the movable stage and sample
			                materials in the EP1-A beam line
         Apr. 9 (Wed.)  10:00 - 19:00; beam exposure (move the materials into 
       				       the beam for the exposure)*
         Apr. 10 (Thu.) 10:00 - 18:30; beam exposure (move the materials into 
       				        the beam for the exposure)*
        Apr. 31  (Mon.)  14:00 - 15:00 ;Take out the cold box from EP1 area
			        and bring it 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 by means of 
      a remote controlled movable table.