Difference between revisions of "September 7, 2011"
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=Pair-spectrometer threshold calibration with beam= | =Pair-spectrometer threshold calibration with beam= | ||
| − | ==By using analog counter. Beam On. Dump out. Collimator Open. Radiator | + | ==By using analog counter. Beam On. Dump out. Collimator Open. Radiator in (10 um Al).== |
[[File:Thresh upstream beam collim 090711.png || 600px]] [[File:Thresh downstream beam collim 090711.png || 600px]] | [[File:Thresh upstream beam collim 090711.png || 600px]] [[File:Thresh downstream beam collim 090711.png || 600px]] | ||
| − | ==By using analog counter. Beam On. Dump out. Collimator Open. Radiator | + | ==By using analog counter. Beam On. Dump out. Collimator Open. Radiator in (10 um Al).== |
was not done | was not done | ||
| Line 28: | Line 28: | ||
| − | ==By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator Open. Radiator | + | ==By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator Open. Radiator in (10 um Al).== |
[[File:Thresh upstream beam collim TDCdata 090711.png | 600px]][[File:Thresh downstream beam collim TDCdata 090711.png | 600px]] | [[File:Thresh upstream beam collim TDCdata 090711.png | 600px]][[File:Thresh downstream beam collim TDCdata 090711.png | 600px]] | ||
| − | ==By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator blocked (see lab log books). Radiator | + | ==By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator blocked (see lab log books). Radiator in (10 um Al).== |
Revision as of 19:31, 7 September 2011
Wednesday Run Plan
- Tune up beam
- During this time, as much as possible tune up daq timing
- Kicker magnet calibration with viewscreen
- Pair spectrometer checkout/debugging
This should include setting thresholds, studying rates with air converter, looking at rates with photon hole open
versus blocked, ...
- Check detector rates with D2O. See if we can get a good time of flight spectrum.
Kicker magnet calibration with viewscreen
Pair-spectrometer threshold calibration with beam
By using analog counter. Beam On. Dump out. Collimator Open. Radiator in (10 um Al).
By using analog counter. Beam On. Dump out. Collimator Open. Radiator in (10 um Al).
was not done
By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator Open. Radiator in (10 um Al).
By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator blocked (see lab log books). Radiator in (10 um Al).
- upstream PS: 150 mV threshold, 19 cnts/10,000 beam pulses
- downstream PS: 150 mV threshold, 18 cnts/10,000 beam pulses
By using TDC to count PS pulses (10,000 beam pulses). Beam On. Dump in. Collimator blocked (see lab log books). Radiator out (10 um Al).
- upstream PS: 150 mV threshold, cnts/10,000 beam pulses
- downstream PS: 150 mV threshold, cnts/10,000 beam pulses