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

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Presentation transcript:

9/72 PMTs 4 darkrate 4 linearity 1 unknown

667 Slow to cooldown

Cooldown

Retest

5 hrs after start of first test 5 hrs6 hrs

667 Spe

Cooldown

Cooldown retest

5 hrs after start of retest 5 hrs6 hrs

667 Gain-Voltage

667 Linearity

679 Slow to cooldown

679 Spe

Cooldown

Cooldown retest

679 Gain-Voltage

679 Linearity

684 Positive Non-Linearity

684 Cooldown

684 Spe

684 Gain-Voltage

684 Linearity

684 Linearity 2

753 Positive non-linearity

753 Cooldown

753 Spe

753 Gain-Voltage

753 Linearity

753 Linearity 2

782 Positive non-linearity

782 Cooldown

782 Spe

782 Gain-voltage

782 Linearity

782 Linearity 2

783 Positive non-linearity

783 Cooldown

783 Spe

783 Gain-Voltage

783 Linearity

783 Linearity 2

792 Darkrate

792 Spe

792 Cooldown

792 Cooldown retest

5 hrs 6 hrs

792 Gain-Voltage

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

792 Linearity

794 Darkrate

794 Darkrate First test: Second test: 9200

794 Spe

794 Cooldown

794 Cooldown retest

5 hrs6 hrs

794 Gain Voltage

794 Linearity

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

816: First test

816: First Test

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

816 Spe

816 Gain-Voltage

816 Linearity

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