Difference between revisions of "CDC prototype drift times"

Revision as of 15:29, 17 November 2011

CDC prototype cosmics data

Purple histogram is drift time in tracks through each straw; gray selects tracks through all 3 straws in same column

drift times for all tracks and tracks in single column of straws, threshold 5 sigma

drift times for all tracks and tracks in single column of straws, threshold 10 sigma

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+CDC prototype cosmics data
+*50/50 mixed Ar, CO<sub>2</sub>
+*Recalibrated MFCs
+*Outer plenum added to CDC prototype to prevent leaks
+*New pre-production HVB
+*2100V
+*Modified preamp4 (terminating resistors removed)
+*Prototype tilted at 30<sup>o</sup> 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
 {| border="0" cellpadding="2"
 |width="900pt"|
 [[Image:run_31716_drifttime_columns_thr5.png|thumb|900px|drift times for all tracks and tracks in single column of straws, threshold 5 sigma ]]
+|}
+{| border="0" cellpadding="2"
+|width="900pt"|
+[[Image:run_31716_drifttime_columns_thr10.png|thumb|900px|drift times for all tracks and tracks in single column of straws, threshold 10 sigma ]]
 |}