Difference between revisions of "Improved timing"
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| − | [[Image:run_31710_timing_1.png|thumb|890px|Interpolated signals for many events]] | + | [[Image:run_31710_timing_1.png|thumb|890px|Interpolated signals for many events (ADC value vs time)]] |
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| − | [[Image:run_31710_timing_2.png|thumb|890px| | + | [[Image:run_31710_timing_2.png|thumb|890px|Histogram of threshold crossing time]] |
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| − | [[Image:run_31710_timing_3.png|thumb|890px| | + | [[Image:run_31710_timing_3.png|thumb|890px|Histogram of threshold crossing time - coincidence time for scintillators and 2D plot]] |
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Revision as of 13:40, 30 August 2011
- Work in progress - intended more as a logbook than presentation of results*
Results using Gerard's leading edge algo to extract drift-time from CDC prototype cosmics data
- 50/50 mixed Ar, CO2
- Recalibrated MFCs
- Outer plenum added to CDC prototype to prevent leaks
- New pre-production HVB
- 2050V
- Modified preamp4 (terminating resistors removed)
- Prototype tilted at 30o to enclosing scintillators (scints trigger the daq)
Fed scintillator signals post-discriminator and coincidence signal through then level converter to ECL, then attentuator, into fADC. Took threshold as half peak value (also tried 1/4 and 3/4 peak but these broadened the timing spectra). Used interpolation algo. (The DAQ is triggered by the coinc signal.)
