Difference between revisions of "CDC prototype drift times"
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[[Image:run_31716_drifttime_trackangle_thr5.png|thumb|900px|drift times for all tracks, tracks angled at 5° or more to vertical and at less than 5° to vertical, threshold 5 sigma ]] | [[Image:run_31716_drifttime_trackangle_thr5.png|thumb|900px|drift times for all tracks, tracks angled at 5° or more to vertical and at less than 5° to vertical, threshold 5 sigma ]] | ||
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| + | Same again just for straw 17 | ||
| + | {| border="0" cellpadding="2" | ||
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| + | [[Image:run_31716_thr5_trackcolumns.png|thumb|300px|single column of straws, threshold 5 sigma ]] | ||
| + | |width="300pt"| | ||
| + | [[Image:run_31716_thr10_trackcolumns.png|thumb|300px|single column of straws, threshold 10 sigma ]] | ||
| + | |width="300pt"| | ||
| + | [[Image:run_31716_thr5_trackangles.png|thumb|300px|track angles, threshold 5 sigma ]] | ||
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Revision as of 19:18, 17 November 2011
CDC prototype cosmics data
- 50/50 mixed Ar, CO2
- Recalibrated MFCs
- Outer plenum added to CDC prototype to prevent leaks
- New pre-production HVB
- 2100V
- Modified preamp4 (terminating resistors removed)
- Prototype tilted at 30o to enclosing scintillators (scints trigger the daq)
- New timing setup (recording coinc logic signal)
Purple histogram is drift time in tracks through each straw; gray selects tracks through all 3 straws in same column, hit threshold is 5sigma over pedestal
hit threshold is 10sigma over pedestal
Below: Purple:all tracks through straw, grey: track angle 5° or more to vertical, light blue: track angle less than 5° to vertical. Hit threshold 5 sigma over pedestal
Same again just for straw 17
