Code

All the code performing the data analysis can be found on the daquser account. The code was written in jupyter under SWAN (swan.cern.ch) using cernbox as the storage. All files were placed under the swan directory: ~/labdata/2018/lab11/PMTs/, in particular note the jupyter notebook called ProduceHistos.ipynb (Also the file ParseRaw.ipynb or the python version of this same file ParseRaw.py). The cernbox space corresponds to an eos mounted space which can easily be accessed from lxplus. The cernbox/swan home directory corresponds to the path: /eos/user/d/daquser. Consequently, the directory above can be accessed through: /eos/user/d/daquser/labdata/2018/lab11/PMTs/ and the jupyter notebook at /eos/user/d/daquser/labdata/2018/lab11/PMTs/ProduceHistos.ipynb. However, it is best to access the jupyter notebooks through SWAN or CERNBOX in order to adequately see the contents.

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 PM7980_2200.png Best separaton so far in our photomultipliers
1.420 2250 10 ns/div 20 mV/div 1 4 PM7980_2250.png
6810 1.390 2350 10 ns/div 20 mV/div 1.5 5 PM6810_2350.png Not the best separation and operating close to maximum voltage
7337 1.420 2300 10 ns/div 20 mV/div 5 7.5 PM7337_2300.png Similar to PM 7497
17248 1.420 2200 10 ns/div 20 mV/div 2 5.5 PM17248_2200.png OK
8885 1.420 2200 10 ns/div 20 mV/div 4.5 9 PM8885_2200.png Peak was broad and not well defined
15598 1.480 2300 10 ns/div 20 mV/div 4 8 PM15598_2300.png Comment
8141 1.430 2350 10 ns/div 20 mV/div 2 7 PM8141_2350.png Comment
17208 1.530 2375 10 ns/div 20 mV/div 2 7 PM17208_2375.png Separation practically missing
9050 1.430 2475 10 ns/div 20 mV/div 2 7 PM9050_2475.png Separation practically missing
7469 1.430 2490 10 ns/div 20 mV/div 2 7 PM7469_2490.png Separation practically missing
7405 1.470 2400 10 ns/div 20 mV/div 3 7 PM7405_2400.png
  • Separation practically missing, maybe to be redone at higher voltage
  • With repeat measurement, it seems to discharge

8657 1.480 2490 10 ns/div 20 mV/div 2.5 7 PM8657_2490.png  
11518 1.680 2300 10 ns/div 20 mV/div 3.5 8 PM11518_2300.png  
11261 1.600 2300 10 ns/div 20 mV/div 3.5 8 PM11261_2300.png  
15697 1.500 2250 10 ns/div 20 mV/div 2.5 6 PM15697_2250.png  
27821 1.460 2275 10 ns/div 20 mV/div 1 5.5 PM27821_2275.png  
1.460 2300 10 ns/div 20 mV/div 1 5.5 PM27821_2300.png  
6094 1.380 1625 10 ns/div 20 mV/div     PM6094_1625.png  
6094 1.380 1650 10 ns/div 20 mV/div     PM6094_1650.png  

-- CristovaoDaCruzESilva - 2018-07-31

Topic attachments
I Attachment History Action Size Date Who CommentSorted ascending
PNGpng PM11261_2300.png r1 manage 10.2 K 2018-06-21 - 17:59 GianfrancoMorello Single electron response for PM 11261 @ 2300V
PNGpng PM11518_2300.png r1 manage 10.3 K 2018-06-21 - 17:58 GianfrancoMorello Single electron response for PM 11518 @ 2300V
PNGpng PM15598_2300.png r1 manage 10.8 K 2018-06-13 - 11:11 CristovaoDaCruzESilva Single electron response for PM 15598 @ 2300V
PNGpng PM15697_2250.png r1 manage 10.6 K 2018-06-21 - 18:37 GianfrancoMorello Single electron response for PM 15697 @ 2250V
PNGpng PM17208_2375.png r1 manage 10.5 K 2018-06-15 - 08:52 GianfrancoMorello Single electron response for PM 17208 @ 2375V
PNGpng PM17248_2200.png r1 manage 10.1 K 2018-06-13 - 11:07 CristovaoDaCruzESilva Single electron response for PM 17248 @ 2200V
PNGpng PM27821_2275.png r1 manage 10.4 K 2018-06-21 - 18:37 GianfrancoMorello Single electron response for PM 27821 @ 2275V
PNGpng PM27821_2300.png r1 manage 10.4 K 2018-06-21 - 18:38 GianfrancoMorello Single electron response for PM 27821 @ 2300V
PNGpng PM6094_1625.png r1 manage 10.1 K 2018-07-31 - 11:26 CristovaoDaCruzESilva Single electron response for PM 6094 @ 1625V
PNGpng PM6094_1650.png r1 manage 10.2 K 2018-07-31 - 11:27 CristovaoDaCruzESilva Single electron response for PM 6094 @ 1650V
PNGpng PM6810_2350.png r1 manage 10.2 K 2018-06-13 - 10:23 CristovaoDaCruzESilva Single electron response for PM 6810 @ 2350V
PNGpng PM7337_2300.png r1 manage 10.7 K 2018-06-13 - 10:24 CristovaoDaCruzESilva Single electron response for PM 7337 @ 2300V
PNGpng PM7469_2490.png r1 manage 10.2 K 2018-06-15 - 11:51 GianfrancoMorello Single electron response for PM 7469 @ 2490V
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 PM7980_2200.png r1 manage 10.2 K 2018-06-13 - 10:21 CristovaoDaCruzESilva Single electron response for PM 7980 @ 2200V
PNGpng PM7980_2250.png r1 manage 10.5 K 2018-06-13 - 10:21 CristovaoDaCruzESilva Single electron response for PM 7980 @ 2250V
PNGpng PM8141_2350.png r1 manage 10.4 K 2018-06-14 - 15:09 GianfrancoMorello Single electron response for PM 8141 @ 2350V
PNGpng PM8657_2490.png r1 manage 10.4 K 2018-06-21 - 17:57 GianfrancoMorello Single electron response for PM 8657 @ 2490V
PNGpng PM8885_2200.png r1 manage 10.5 K 2018-06-13 - 11:09 CristovaoDaCruzESilva Single electron response for PM 8885 @ 2200V
PNGpng PM8919_2490.png r1 manage 10.7 K 2018-06-12 - 17:23 CristovaoDaCruzESilva Single electron response for PM 8919 @ 2490V
PNGpng PM9050_2475.png r1 manage 10.4 K 2018-06-15 - 10:29 GianfrancoMorello Single electron response for PM 9050 @ 2475V
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
PNGpng PM7405_2400.png r1 manage 10.4 K 2018-06-18 - 11:13 GianfrancoMorello Single electron response for PM7405 @ 2400V
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Topic revision: r15 - 2018-07-31 - CristovaoDaCruzESilva
 
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