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Measurements

Measurements of the Single Electron Response (SER) of the photomultipliers. For a full list of the available photomultipliers, see PhotomultiplierInventory2018.

ID LED HV Timebase Scale Int Min Int Max Result Comments
Sune 1.470 2150 10 ns/div 20 mV/div 2 7 PMSune_2150.png  
1.470 2198 10 ns/div 20 mV/div 2 7 PMSune_2198.png  
1.470 2250 10 ns/div 20 mV/div 2 7 PMSune_2250.png  
8919 1.445 2490 10 ns/div 20 mV/div 3.5 7 PM8919_2490.png No separation
7481 1.435 2496 10 ns/div 20 mV/div 3.5 8 PM7481_2496.png No separation
7497 1.420 2300 10 ns/div 20 mV/div 4 8 PM7497_2300.png Weird results:
  • We do see a peak moving with the HV, but there is some kind of underlying structure. What is it?
  • The larger pulses also seem to always come accompanied by a second smaller pulse.
7980 1.420 2200 10 ns/div 20 mV/div 1.5 5   Best separaton so far in our photomultipliers
1.420 2250 10 ns/div 20 mV/div 1 4  
6810 1.390 2350 10 ns/div 20 mV/div 1.5 5   Not the best separation and operating close to maximum voltage
7337 1.420 2300 10 ns/div 20 mV/div 5 7.5   Similar to PM 7497
17248 1.420 2200 10 ns/div 20 mV/div 2 5.5   OK
8885 1.420 2200 10 ns/div 20 mV/div 4.5 9   Peak was broad and not well defined
15598 1.480 2300 10 ns/div 20 mV/div 4 8   Comment
         

-- CristovaoDaCruzESilva - 2018-06-11

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng PM7481_2496.png r1 manage 10.7 K 2018-06-12 - 17:36 CristovaoDaCruzESilva Single electron response for PM 7481 @ 2496V
PNGpng PM7497_2300.png r1 manage 10.9 K 2018-06-12 - 17:39 CristovaoDaCruzESilva Single electron response for PM 7497 @ 2300V
PNGpng PM8919_2490.png r1 manage 10.7 K 2018-06-12 - 17:23 CristovaoDaCruzESilva Single electron response for PM 8919 @ 2490V
PNGpng PMSune_2150.png r1 manage 9.9 K 2018-06-12 - 17:12 CristovaoDaCruzESilva Single electron response for PM Sune @ 2150V
PNGpng PMSune_2198.png r1 manage 9.7 K 2018-06-12 - 17:18 CristovaoDaCruzESilva Single electron response for PM Sune @ 2198V
PNGpng PMSune_2250.png r1 manage 9.8 K 2018-06-12 - 17:18 CristovaoDaCruzESilva Single electron response for PM Sune @ 2250V
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Topic revision: r4 - 2018-06-12 - CristovaoDaCruzESilva
 
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