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phase2:led [2015/07/17 19:18]
asc 		phase2:led [2015/09/30 15:07] (current)
asc
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 Here  is a data library with PMT signals with different attenuators.  Here  is a data library with PMT signals with different attenuators. 
-The dynamic rage is from 1 pC to 2000 pC. The data are collected using R5900 PMT with active dividers and 676 V, and a WLS fiber, Patrick's driver +The dynamic rage is from 1 pC to 2000 pC. The data are collected using R5900 PMT with active dividers and 676 V, and a WLS fibre, Patrick's driver 
 with 4 ns pulse width and David's LED setup. with 4 ns pulse width and David's LED setup.
 +
 +The talk that describes this study is [[https://indico.cern.ch/event/441970/contribution/16/attachments/1162896/1675431/LEDResults.pdf| Studies of PMT block signal shapes using passive and active dividers, Tile upgrade week, Sep 30, 2015]]
    
 Download the signal files from  [[https://atlaswww.hep.anl.gov/asc/phase2/data/]], and then gunzip  it. To make a plot for 1 trace, use Download the signal files from  [[https://atlaswww.hep.anl.gov/asc/phase2/data/]], and then gunzip  it. To make a plot for 1 trace, use
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 wget --no-check-certificate https://atlaswww.hep.anl.gov/asc/phase2/data/pmt_signals_phase2.tgz -O - | tar -xz; wget --no-check-certificate https://atlaswww.hep.anl.gov/asc/phase2/data/pmt_signals_phase2.tgz -O - | tar -xz;
 cd pmt_signals_phase2/ cd pmt_signals_phase2/
-python show_trace.py data/D1_traces_full.txt.gz 1+python show_trace.py data/D1_traces_full.txt.gz 1 # show 1st trace out of 1000
 </code> </code>
  
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 The file names has a letter "D" that indicates attenuation strength for the light. The file names has a letter "D" that indicates attenuation strength for the light.
  
-  - D1 NDF16 + 6xNDF50 - 16x2x6 light reduction (0.3 pC signal) +  - D1 NDF16 + 6xNDF50. Reduction of light by 6*2*16. About 0.3 pc -> x1024 
-  - D2 NDF16 + 5xNDF50 +  - D2 NDF16 + 5xNDF50 -> x512 
-  - D3 NDF16 + 4xNDF50 +  - D3 NDF16 + 4xNDF50 -> x256 
-  - D4 NDF16 + 3xNDF50 +  - D4 NDF16 + 3xNDF50 -> x128 
-  - D5 NDF16 + 2xNDF50 +  - D5 NDF16 + 2xNDF50 -> x64 
-  - D6 NDF16 + 1xNDF50 +  - D6 NDF16 + 1xNDF50 -> x32 
-  - D7 NDF16  (light reduction by a factor 16) +  - D7 NDF16  (light reduction by a factor 16) -> x16 
-  - D8 3xNDF50 +  - D8 3xNDF50 -> x8 
-  - D9  2xNDF50   +  - D9  2xNDF50 -> x4 
-  - D10 1xNDF50  (light reduction by a factor 2) +  - D10 1xNDF50  (light reduction by a factor 2) -> x2 
-  - D11  - no NDF. About 2000 pC+  - D11  - no NDF. About 2000 pC ->0
  
-Figures for 1000 traces for eaxh "D" case are in the directory "figures".  Each trace was centralized at time=0. We use a numeric noise suppression for all traces as shown in this image. +Figures for 1000 traces are in "figures".  Each trace was centralized at time=0. We use a numeric noise suppression for all traces as shown in this image.
-The step size is 0.2 ns.+
  
 {{:noise.png}} {{:noise.png}}
  
-Blue lines show traces before the noise, and small grey dots after the noise suppression. The green dots show the noise in the LED driver.+Blue lines show traces before the noise removal, and small grey dots after the noise suppression. The green dots show the noise in the LED driver.
  
  --- //[[[email protected]|Sergei Chekanov]] 2015/07/17 14:00//  --- //[[[email protected]|Sergei Chekanov]] 2015/07/17 14:00//
phase2/led.1437160703.txt.gz · Last modified: 2015/07/17 19:18 by asc

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