Difference between revisions of "BCal Beam Test Plots, April 10, 2007"
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==Cell 7:== | ==Cell 7:== | ||
| − | *Walk Corrections | + | *'''Walk Corrections''' |
#cuts: Nphotons==1 && abs(tn7+tphoton-531) <10 && s7>200 | #cuts: Nphotons==1 && abs(tn7+tphoton-531) <10 && s7>200 | ||
| Line 10: | Line 10: | ||
| − | *Time resolution | + | *'''Time resolution''' |
In the 4 plots below (similarly for the other cells), time difference between the mean time of the cell and the tagger is shown as a function of photon energy as reported by the tagger. | In the 4 plots below (similarly for the other cells), time difference between the mean time of the cell and the tagger is shown as a function of photon energy as reported by the tagger. | ||
| Line 24: | Line 24: | ||
==Cell 8:== | ==Cell 8:== | ||
| − | *Time walk | + | *'''Time walk''' |
[[Image:Bcal timewalk n8 3.gif|"North 8"|360px]][[Image:Bcal timewalk s8 3.gif|"South 8"|360px]] | [[Image:Bcal timewalk n8 3.gif|"North 8"|360px]][[Image:Bcal timewalk s8 3.gif|"South 8"|360px]] | ||
| − | *Time resolution | + | *'''Time resolution''' |
[[Image:Bcal time res 8 3.gif]] | [[Image:Bcal time res 8 3.gif]] | ||
==Cell 9:== | ==Cell 9:== | ||
| − | *Time walk | + | *'''Time walk''' |
[[Image:Bcal timewalk n9 3.gif|"North 9"|360px]][[Image:Bcal timewalk s9 3.gif|"South 9"|360px]] | [[Image:Bcal timewalk n9 3.gif|"North 9"|360px]][[Image:Bcal timewalk s9 3.gif|"South 9"|360px]] | ||
| − | *Time | + | *'''Time resolution''' |
[[Image:Bcal time res 9 3.gif]] | [[Image:Bcal time res 9 3.gif]] | ||
==Cell 10:== | ==Cell 10:== | ||
| − | *Time walk | + | *'''Time walk''' |
[[Image:Bcal timewalk n10 3.gif|"North 10"|360px]][[Image:Bcal timewalk s10 3.gif|"South 10"|360px]] | [[Image:Bcal timewalk n10 3.gif|"North 10"|360px]][[Image:Bcal timewalk s10 3.gif|"South 10"|360px]] | ||
| − | *Time resolution | + | *'''Time resolution''' |
[[Image:Bcal time res 10 3.gif]] | [[Image:Bcal time res 10 3.gif]] | ||
Latest revision as of 12:20, 10 April 2007
Contents
Cell 7:
- Walk Corrections
- cuts: Nphotons==1 && abs(tn7+tphoton-531) <10 && s7>200
- fit: [0]*exp([1]*x)+[2]+[3]*x = (exponential + constant + linear)
- Time resolution
In the 4 plots below (similarly for the other cells), time difference between the mean time of the cell and the tagger is shown as a function of photon energy as reported by the tagger.
(tn8+ts8)/2.0 - (-tphoton) - 531
The top plot (black dots) has no timewalk corrections applied. The 2nd plot (red dots) has the timewalk correction functions applied to each of the tubes. The 3rd plot shows the sigmas resulting from fitting slices of the top 2 histograms to gaussians for each x-bin. This indicates the timing resolution as a function of incident photon energy with(red) and without(black) timewalk corrections applied to each of the TDC signals. The bottom plot is a fit to the 3rd plot(red dots) fitting the function
sqrt( (p0/sqrt(E[GeV]))^2 + (p1)^2 )
Cell 8:
- Time walk
- Time resolution
Cell 9:
- Time walk
- Time resolution
Cell 10:
- Time walk
- Time resolution
