Difference between revisions of "CDC signal integration"
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Try to calculate dE/dx | Try to calculate dE/dx | ||
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|[[Image:run_31757_intmax1dx.png|thumb|x250px|No tilt]] | |[[Image:run_31757_intmax1dx.png|thumb|x250px|No tilt]] | ||
|[[Image:run_31765_intmax1dx.png|thumb|x250px|Tilted at 45 degrees]] | |[[Image:run_31765_intmax1dx.png|thumb|x250px|Tilted at 45 degrees]] | ||
| + | |} | ||
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| + | Look at time over threshold... | ||
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| + | 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 | ||
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| + | {| border="0" cellpadding="2" | ||
| + | |+Peak duration | ||
| + | |[[Image:run_31757_pklength.png|thumb|x250px|No tilt]] | ||
| + | |[[Image:run_31765_pklength.png|thumb|x250px|Tilted at 45 degrees]] | ||
| + | |} | ||
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| + | {| border="0" cellpadding="2" | ||
| + | |+Peak duration / track length | ||
| + | |[[Image:run_31757_pklengthdx.png|thumb|x250px|No tilt]] | ||
| + | |[[Image:run_31765_pklengthdx.png|thumb|x250px|Tilted at 45 degrees]] | ||
| + | |} | ||
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| + | {| border="0" cellpadding="2" | ||
| + | |+Peak length vs first maximum in signal amplitude | ||
| + | |[[Image:run_31757_pklength_maxamp.png|thumb|x250px|No tilt]] | ||
| + | |[[Image:run_31765_pklength_maxamp.png|thumb|x250px|Tilted at 45 degrees]] | ||
|} | |} | ||
Revision as of 15:38, 19 June 2012
50/50 gas, 2100V
- Caveat: data were with preamp underpowered, 2.65V on preamp card ****
Try to calculate dE/dx
This does not scale very nicely with track length.
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
