Differences

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--- itk:testbeam [2016/09/30 14:09] – [Plots after calibration] asc
+++ itk:testbeam [2016/10/04 15:11] (current) – asc
@@ Line 1: / Line 1: @@
-======  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]].
-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]].
 To start the run, use:
@@ Line 19: / Line 21: @@
 Details on 2 tests:
-) Testing RTI (USA vendor) to test bum bonding.  We use  2 V for low voltage and max 0.5 A. We set -80 V as bias voltage for RTI (FE-I4B) board.
+) Testing RTI (USA vendor) to test bump bonding.  We use  2 V for low voltage and max 0.5 A. We set -80 V as bias voltage for RTI (FE-I4B) board.
@@ Line 27: / Line 29: @@
   * 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 ======
@@ Line 176: / Line 195: @@
-Both modules from RTI have  shown signs of degradation performance. After about ~6-8h, we start to see problems for the analog
+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.
-channels. The occupancy 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.
-This problem is not related to the active beam, since the red module was not under the beam in Sep 28.