Difference between revisions of "Signal cable timing"

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{| border="1" style="border: 1px solid black; border-collapse: collapse; padding: 5px; text-align: center "
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[[2nCor Equipment#2016-2017 IAC run on the 44 machine | Go back]]
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==Procedure and setup==
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PMT timing relative to D30T001 is measured by splitting a pulse from a pulse generator.
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PMT top-bottom difference is the mean time difference of the 2 PMT's using the TDC spectrum of a coincidence run with the CF-252 source. The source was placed in the center of all detectors and 150.5 cm above the floor.  The trigger detector was located 5.5 cm below the very bottom of the source.
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Detector PMT thresholds at 50 mv.
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Trigger PMT threshold at 35 mv.
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All high voltages are set to -1700 V
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==Results==
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{| border="1" style="border: 4px solid black; border-collapse: collapse; padding: 5px; text-align: center "
 
! colspan="2"|Detector   
 
! colspan="2"|Detector   
 
!style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2"| PMT  
 
!style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2"| PMT  
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2"| sig. cable  
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2"| sig. cable
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | Variable index*
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | <math>\Delta t</math> relative to D30T001 [ns]
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | <math>\Delta t</math> relative to D30T001 [ns]
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2" | PMT bot - PMT top
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle"  rowspan="2" | bottom - top [ns]
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | Run #
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! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | Run time [sec]
 
|-
 
|-
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;"| angle
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;"| angle
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;" |color  
 
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;" |color  
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|-
 
|-
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| rowspan="2" | 30  ||rowspan="2" | Red || Top ||D30T001 || +0.0 || rowspan="2" | -
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| rowspan="2" | 30   
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| rowspan="2" | Red
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| Top
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| D30T001
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|1
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| style=" text-align: right " | +0 (by definition)    <!--Top delta t from D30T001-->
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| rowspan="2" | +12.5  <!--Bottom minus top-->
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| rowspan="4" | r5218
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| rowspan="4" | 1221
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|- style=" border-bottom: 2px solid black"
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|  Bot
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| D30B002
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|2
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| +12.5    <!--Bottom delta t from D30T001-->
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|-
 
|-
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| Bot ||D30B002|| +1.0
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| rowspan="2" | 90 
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| rowspan="2" | Yellow
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| Top
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| D90T003
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|3
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| +1 <!--Top delta t from D30T001-->
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| rowspan="2" | +10.5  <!--Bottom minus top-->
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|- style=" border-bottom: 2px solid black"
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|  Bot
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| D90B004
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|4
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| +11.5  <!--Bottom delta t from D30T001-->
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|-
 
|-
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| rowspan="2" | 150 
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| rowspan="2" | Blue
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| Top
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| D150T005
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|1
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| +1  <!--Top delta t from D30T001-->
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| rowspan="2" | +13  <!--Bottom minus top-->
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| rowspan="4" | r5217
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| rowspan="4" | 1106  <!-- Time-->
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|- style=" border-bottom: 2px solid black"
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|  Bot
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| D150B006
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|2
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| +14  <!--Bottom delta t from D30T001-->
  
 
|-
 
|-
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| rowspan="2" | 90 ||rowspan="2" | Yellow || Top ||D90T003 || +0.0 || rowspan="2" | -
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| style=" border-bottom: 2px solid black"  rowspan="2" | 225  
−
|-
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| style=" border-bottom: 2px solid black" rowspan="2" | Wood
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| Bot ||D90B004|| +1.0
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| Top  
−
|-
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| D225T007
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|3
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| -3  <!--Top delta t from D30T001-->
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|style=" border-bottom: 2px solid black"  rowspan="2" | +24  <!--Bottom minus top-->
  
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|- style=" border-bottom: 2px solid black"
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|  Bot
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| D225B008
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|4
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| +21  <!--Bottom delta t from D30T001-->
 
|}
 
|}
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<nowiki>*</nowiki> for ROOT, e.g. evt.TDC1190[1][i], where i is the variable index.
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Trigger plugged into patch panel 223A15 : -8 ns

Latest revision as of 22:55, 17 August 2016

Go back

Procedure and setup

PMT timing relative to D30T001 is measured by splitting a pulse from a pulse generator.

PMT top-bottom difference is the mean time difference of the 2 PMT's using the TDC spectrum of a coincidence run with the CF-252 source. The source was placed in the center of all detectors and 150.5 cm above the floor. The trigger detector was located 5.5 cm below the very bottom of the source.


Detector PMT thresholds at 50 mv.

Trigger PMT threshold at 35 mv.

All high voltages are set to -1700 V

Results

Detector PMT sig. cable Variable index* [math]\Delta t[/math] relative to D30T001 [ns] bottom - top [ns] Run # Run time [sec]
angle color


30 Red Top D30T001 1 +0 (by definition) +12.5 r5218 1221
Bot D30B002 2 +12.5
90 Yellow Top D90T003 3 +1 +10.5
Bot D90B004 4 +11.5
150 Blue Top D150T005 1 +1 +13 r5217 1106
Bot D150B006 2 +14
225 Wood Top D225T007 3 -3 +24
Bot D225B008 4 +21

* for ROOT, e.g. evt.TDC1190[1][i], where i is the variable index.

Trigger plugged into patch panel 223A15 : -8 ns

Retrieved from "https://wiki.iac.isu.edu/index.php?title=Signal_cable_timing&oldid=107992"