Difference between revisions of "05/10/2011"

Revision as of 16:22, 10 May 2011

continue...the same set up as before, the distances are the same:

First I change the power supply for HAMAMATSU PMT to the new 2 channel one C.A.E.N N471)

The powers are:

PS1 and PS2:  -1000 V (the old 2-channel TENNELEC TC952)
n's: -1100 V (the new 2-channel C.A.E.N N471)

The thresholds were:

PS1 and PS2:  -80 mV
n's: -60 mV

Let see what we have. First he CF-243 source is far far away (sealed in the safe):

	counts/min (1 min test)	counts/min (1 min test)	counts/min (5 min test)
PS1	187	160	166
PS2	187	170	180.4
PS1+PS2
n's	205	204	201.2

@@ Line 7: / Line 7: @@
-But now I am going to increase the power supply for HAMAMATSU, adjust threshold  and see what happens.
+First I change the power supply for HAMAMATSU PMT to the new 2 channel one C.A.E.N N471)
 The powers are:
-  PS1 and PS2:  -1000 V (but different power supply, the old one TENNELEC TC952)
+  PS1 and PS2:  -1000 V (the old 2-channel TENNELEC TC952)
-  n's: -1100 V (but different power supply, the new one C.A.E.N N471)
+  n's: -1100 V (the new 2-channel C.A.E.N N471)
@@ Line 33: / Line 33: @@
 |-
 !PS1
-|187||160||
+|187||160||166||
 |-
 !PS2
-|187||170||
+|187||170||180.4||
 |-
 !PS1+PS2
@@ Line 42: / Line 42: @@
 |-
 !n's
-|205||204||
+|205||204||201.2||
 |}