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9/72 PMTs 4 darkrate 4 linearity 1 unknown. 667 Slow to cooldown.

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Presentation on theme: "9/72 PMTs 4 darkrate 4 linearity 1 unknown. 667 Slow to cooldown."— Presentation transcript:

1 9/72 PMTs 4 darkrate 4 linearity 1 unknown

2 667 Slow to cooldown

3 Cooldown

4 Retest

5 5 hrs after start of first test 5 hrs6 hrs

6 667 Spe

7 Cooldown

8 Cooldown retest

9 5 hrs after start of retest 5 hrs6 hrs

10 667 Gain-Voltage

11 667 Linearity

12 679 Slow to cooldown

13 679 Spe

14 Cooldown

15 Cooldown retest

16 679 Gain-Voltage

17 679 Linearity

18 684 Positive Non-Linearity

19 684 Cooldown

20 684 Spe

21 684 Gain-Voltage

22 684 Linearity

23 684 Linearity 2

24 753 Positive non-linearity

25 753 Cooldown

26 753 Spe

27 753 Gain-Voltage

28

29 753 Linearity

30 753 Linearity 2

31 782 Positive non-linearity

32 782 Cooldown

33 782 Spe

34 782 Gain-voltage

35 782 Linearity

36 782 Linearity 2

37 783 Positive non-linearity

38 783 Cooldown

39 783 Spe

40 783 Gain-Voltage

41 783 Linearity

42 783 Linearity 2

43 792 Darkrate

44 792 Spe

45 792 Cooldown

46 792 Cooldown retest

47 5 hrs 6 hrs

48 792 Gain-Voltage

49 792 Darkrate First test: 12800 above 0.25 spe Second Test: 9100 above 0.25 spe

50 792 Linearity

51 794 Darkrate

52 794 Darkrate First test: 14000 Second test: 9200

53 794 Spe

54 794 Cooldown

55 794 Cooldown retest

56 5 hrs6 hrs

57 794 Gain Voltage

58 794 Linearity

59 816 First test: failure not yet diagnosed Positive Non-linearity on second test

60 816: First test

61 816: First Test

62 The dynode signals clearly are strange But the anode and dynode signals correlate  Problem with PMT, not instrumental failure in readout.

63 816 Spe

64 816 Gain-Voltage

65 816 Linearity


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