From:	KEKVAX::TERADA       26-SEP-1996 10:34:40.20
To:	CHIBAJ
CC:	MINORU,BANPAKU,YAMANOI,MIURAT,IMAZATO,KONDO,KOHRIKI,UNNO,IWASAKIH,TERADA
Subj:	Beam request for a proton irradiation (T363)

Dear Chiba-san,

	We want to carry out a proton irradiation on silicon detectors and
Kapton printed circuitse (T363) during the beam cycle which will be starting
on Oct. 2nd. The plan is less material and shorter exposure than that for
the previous run (June '96).


Outline of our plan is as follows;

Purpose: To verify radiation hardness of the most updated design of a 
CDF SVX-II silicon strip detector.
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: 0.4 x 10e14/cm2  over 1.6 x 7.5 cm2
	ii) High fluence run: 2.0 x 10e14/cm2 over 2.0 x 6cm2

Expected exposure time:
	i)  low fluence run:   1 hour.  
	ii) high fluence run : 4 hours
		------------------
                   Total : 5 hours

	We assumed an extracted beam intensity as 3 x 10e12 ppp in every
        3 seconds.
	

Materials and their thickness intercepting the beam at upstream of EP1-A 
 1. For low fluence exposure;
     Silicon detector (1.6cm x 7.5cm x 0.3mmt) -------- 4   0.013 X0
     Al foil (0.1mmt) + Mylar (0.1 mmt)   ------------- 1   0.001 X0
	   
           	        Total:  0.014 X0

 2. For high fluence exposure;
     Kapton flexible PC (2.0cm x 6cm x 0.15mmt)   ---------- 4   0.011 X0
     Kapton flexible PC (2.0cm x 6cmx 0.03 mmt) -------------2   0.001 X0
     Kapton PC with G10 plate (2cm x 6cm x 0.8mmt) --------- 2   0.016 X0
     Al foil (0.1mmt) + Mylar (0.1mmt)    ------------------ 1   0.001 X0

			Total: 0.029 X0

 3. PIN photo diodes                      ------------ 2


Schedule:
	Oct. 1 (Tue.) 14:00 - 15:00; Setup the movable stage and sample
				     materials in the EP1-A beam line
        Oct. 3 (Fri.) 14:00 - 19:00 beam exposure (move the materials into 
       				  the beamline)*
	Oct. 18 (Fri)  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 just for the 
      5 hour exposure time by means of a remote controled movable table.
	
Best regards,
Susumu Terada