Difference between revisions of "CDC signal integration"
| Line 2: | Line 2: | ||
**** Caveat: LHS data were with preamp underpowered, 2.65V on preamp card; RHS data were with 3.0V @ preamp card**** | **** Caveat: LHS data were with preamp underpowered, 2.65V on preamp card; RHS data were with 3.0V @ preamp card**** | ||
| + | Run numbers are 31757 (horiz) and 31765 (tilt 45deg) at 2.65V, 2.1kV; 31809 (horiz) and 31810 (45 deg) at 3.0V, 2.09kV | ||
| + | |||
| + | Pedestal stability | ||
| + | |||
| + | {| border="0" cellpadding="2" | ||
| + | |+Pedestal height | ||
| + | |[[Image:run_31757_ped20.png|thumb|x150px|No tilt, LV 2.7V, HV 2100V]] | ||
| + | |[[Image:run_31765_ped20.png|thumb|x150px|45 degrees, LV 2.7V, HV 2100V]] | ||
| + | |[[Image:run_31809_ped20.png|thumb|x150px|No tilt, LV 3.0V, HV 2090V]] | ||
| + | |[[Image:run_31810_ped20.png|thumb|x150px|45 degrees, LV 3.0V, HV 2090V]] | ||
| + | |} | ||
| + | |||
| + | {| border="0" cellpadding="2" | ||
| + | |+Pedestal width (std dev of first 100 samples in each event) | ||
| + | |[[Image:run_31757_sig20.png|thumb|x150px|No tilt, LV 2.7V, HV 2100V]] | ||
| + | |[[Image:run_31765_sig20.png|thumb|x150px|45 degrees, LV 2.7V, HV 2100V]] | ||
| + | |[[Image:run_31809_sig20.png|thumb|x150px|No tilt, LV 3.0V, HV 2090V]] | ||
| + | |[[Image:run_31810_sig20.png|thumb|x150px|45 degrees, LV 3.0V, HV 2090V]] | ||
| + | |} | ||
| + | |||
Revision as of 11:16, 2 July 2012
50/50 gas, 2100V (left column(s)) 2090 (right column(s))
- Caveat: LHS data were with preamp underpowered, 2.65V on preamp card; RHS data were with 3.0V @ preamp card****
Run numbers are 31757 (horiz) and 31765 (tilt 45deg) at 2.65V, 2.1kV; 31809 (horiz) and 31810 (45 deg) at 3.0V, 2.09kV
Pedestal stability
Try to calculate dE/dx
The ratio of tilted to horizontal integration means is 1.24 whereas the ratio of track length is ~ 1.4.
Track length is calculated in the plane parallel to the endplates (no z information) so I scaled it by the tilt of the prototype for the 45 degree data, the upper cosmic trigger scintillator is high up enough that the cosmics are ~ vertical
Look at time over threshold...
Peak duration is # samples after the lower threshold crossing until the ADC value decreases by 2sigma over 2 samples, this is a measure of time over threshold in units of 8ns
