Difference between revisions of "CDC algo tuning"
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<h4>Original code, many samples upsampled</h4> | <h4>Original code, many samples upsampled</h4> | ||
+ | #Event pedestal is mean of 100 samples ending at trigger time | ||
#Find hit threshold crossing | #Find hit threshold crossing | ||
#Step back <pedlead> points to find new pedestal | #Step back <pedlead> points to find new pedestal | ||
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<h4>Fewer samples upsampled</h4> | <h4>Fewer samples upsampled</h4> | ||
+ | #Event pedestal is mean of 100 samples ending at trigger time | ||
#Find hit threshold crossing | #Find hit threshold crossing | ||
#Upsample region around threshold crossing, with threshold crossing sample in set position | #Upsample region around threshold crossing, with threshold crossing sample in set position | ||
Line 39: | Line 41: | ||
#Or interpolate around initial hit threshold xing and pass in number of 1/5 sample time? | #Or interpolate around initial hit threshold xing and pass in number of 1/5 sample time? | ||
#Try reverting to one threshold crossing instead of the extrapolation | #Try reverting to one threshold crossing instead of the extrapolation | ||
+ | #Try something easier for event pedestal |
Revision as of 14:17, 4 December 2013
Using prototype data from CDC_50_50 (run 31924) with offline analysis
50/50 Ar/CO2 and cosmics, 2100V, prototype horizontal
Original code, many samples upsampled
- Event pedestal is mean of 100 samples ending at trigger time
- Find hit threshold crossing
- Step back <pedlead> points to find new pedestal
- Search forward to find high threshold crossing
- Search backward to find low threshold crossing
- Project through both thresholds to find pedestal crossing time
Fewer samples upsampled
- Event pedestal is mean of 100 samples ending at trigger time
- Find hit threshold crossing
- Upsample region around threshold crossing, with threshold crossing sample in set position
- Step back <pedlead> points to find new pedestal
- Search forward to find high threshold crossing
- Search backward to find low threshold crossing
- Project through both thresholds to find pedestal crossing time
Ideas
- Check whether interpolating threshold xings makes any difference
- ? Pass in hit pedestal to upsampling module, to find initial hit threshold xing better
- Or interpolate around initial hit threshold xing and pass in number of 1/5 sample time?
- Try reverting to one threshold crossing instead of the extrapolation
- Try something easier for event pedestal