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itk:testbeam [2016/09/30 13:32]
asc 		itk:testbeam [2016/09/30 18:05]
asc
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-======  Pixel module test beam ====== +======  Pixel module test beam at SLAC ====== 
-(prepared by S.Chekanov)+(some notes by S.Chekanov)
  
  
 Here are the useful links on test beam in Sep. 2016 at SLAC. The plan is discuses  [[https://twiki.cern.ch/twiki/bin/viewauth/Atlas/ITkPixelTestBeamSLACSep2016|on this wiki at SLAC]]. Here are the useful links on test beam in Sep. 2016 at SLAC. The plan is discuses  [[https://twiki.cern.ch/twiki/bin/viewauth/Atlas/ITkPixelTestBeamSLACSep2016|on this wiki at SLAC]].
  
-What is used: 11 GeV secondary electrons (~100 - 200 per bunch), 5 HZ frequency. Original electron beam is 14 GeV.+What is used: 11 GeV secondary electrons (~10-100  per bunch), 5 HZ frequency. 
 +The beam sport is about 1x1 cm (tunable). 
 + Original electron beam is 14 GeV.
 The setup is described in [[https://confluence.slac.stanford.edu/display/Atlas/TestBeam| Setup at SLAC]]. The setup is described in [[https://confluence.slac.stanford.edu/display/Atlas/TestBeam| Setup at SLAC]].
 To start the run, use: To start the run, use:
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   * Readout ASIC with 65 nm (vs 130 nm for FE-4IB). This decrease of ASIC leads to smaller sizes.   * Readout ASIC with 65 nm (vs 130 nm for FE-4IB). This decrease of ASIC leads to smaller sizes.
  
 +Here is the setup at the end-station A:
  
-====== How to make calibration ======+This is the  RTI module (uncovered): 
 + 
 +{{:itk:img_20160928_103349.jpg?400|Setup}} 
 + 
 +This is the  RTI module + RD53 prototype (uncovered): 
 + 
 +{{:itk:img_20160928_100735.jpg?400|Setup}} 
 + 
 +Telescope: 
 + 
 +{{:itk:img_20160927_142154.jpg?400|Telescope}} 
 + 
 +Control room upstairs: 
 + 
 +{{:itk:img_20160930_071901.jpg?400|Control room}} 
 + 
 +====== How to calibrate the module ======
  
  
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 {{:itk:analog_sep30.png?400|}} {{:itk:analog_sep30.png?400|}}
 +
 +Note large number of low occupancy channels (40 counts instead 50). Right after installing this module, we had 99% of fully efficient channels..
  
 {{:itk:thres_sep30.png?400|}} {{:itk:thres_sep30.png?400|}}
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 <code bash> <code bash>
-/home/tbsclac/pixelrce/rce/moduleconfigs/RTISC2B/config/RTISC2B__cern__158.cfg # from 6.15 AM+/home/tbsclac/pixelrce/rce/moduleconfigs/RTISC2B/config/RTISC2B__cern__225.cfg # from 7.00 AM
 </code> </code>
  
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-Both modules from RTI has shown signs of degradation performance. After about the nigh (~6-8h), we start to see problems for the anlog part - less efficient number of pixels, and the noise significantly increases.+Both modules from RTI have  shown signs of degradation in performance. After about ~6-8h, we start to see problems for the analog readout. The occupancy for analog channel efficiency for  uncalibrated module goes from 99% to 70% after 6h. The noise increases by a factor 2.   
 + 
 +This problem is not related to the active beam, since the red module was not under the beam on Sep 28.  
 + 
  
 ====== Information on scans ====== ====== Information on scans ======
itk/testbeam.txt · Last modified: 2016/10/04 15:11 by asc

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