Difference between revisions of "Signal cable timing"
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[[2nCor Equipment#2016-2017 IAC run on the 44 machine | Go back]] | [[2nCor Equipment#2016-2017 IAC run on the 44 machine | Go back]] | ||
| − | ==Procedure== | + | ==Procedure and setup== |
PMT timing relative to D30T001 is measured by splitting a pulse from a pulse generator. | 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 PMT's using | + | 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== | ==Results== | ||
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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" | 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] | ||
| − | ! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | | + | ! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | bottom - top [ns] |
! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | Run # | ! style="border: 1px solid black; border-bottom: 3px solid black; padding: 5px;vertical-align: middle" rowspan="2" | Run # | ||
| + | ! 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 | ||
| Line 32: | Line 36: | ||
| style=" text-align: right " | +0 (by definition) <!--Top delta t from D30T001--> | | style=" text-align: right " | +0 (by definition) <!--Top delta t from D30T001--> | ||
| rowspan="2" | +12.5 <!--Bottom minus top--> | | rowspan="2" | +12.5 <!--Bottom minus top--> | ||
| − | | rowspan="4" | | + | | rowspan="4" | r5218 |
| + | | rowspan="4" | 1221 | ||
|- style=" border-bottom: 2px solid black" | |- style=" border-bottom: 2px solid black" | ||
| Line 64: | Line 69: | ||
| rowspan="2" | +13 <!--Bottom minus top--> | | rowspan="2" | +13 <!--Bottom minus top--> | ||
| rowspan="4" | r5217 | | rowspan="4" | r5217 | ||
| + | | rowspan="4" | 1106 <!-- Time--> | ||
|- style=" border-bottom: 2px solid black" | |- style=" border-bottom: 2px solid black" | ||
| Line 78: | Line 84: | ||
|3 | |3 | ||
| -3 <!--Top delta t from D30T001--> | | -3 <!--Top delta t from D30T001--> | ||
| − | |style=" border-bottom: 2px solid black" rowspan="2" | + | + | |style=" border-bottom: 2px solid black" rowspan="2" | +24 <!--Bottom minus top--> |
|- style=" border-bottom: 2px solid black" | |- style=" border-bottom: 2px solid black" | ||
| Line 84: | Line 90: | ||
| D225B008 | | D225B008 | ||
|4 | |4 | ||
| − | | + | + | | +21 <!--Bottom delta t from D30T001--> |
|} | |} | ||
| − | + | <nowiki>*</nowiki> for ROOT, e.g. evt.TDC1190[1][i], where i is the variable index. | |
Trigger plugged into patch panel 223A15 : -8 ns | Trigger plugged into patch panel 223A15 : -8 ns | ||
Latest revision as of 22:55, 17 August 2016
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* | 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