Difference between revisions of "CDC run 2551 drift time fits"
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|[[Image:cdc_fitshapes.png|thumb|x200px|Drift time fit function]] | |[[Image:cdc_fitshapes.png|thumb|x200px|Drift time fit function]] | ||
|} | |} | ||
+ | |||
+ | Fit statistics from first pass over data with ~5k counts per straw | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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|[[Image:cdc_run2551_par6_par8.png|thumb|x200px|Drift time fit parameter 6 vs parameter 8]] | |[[Image:cdc_run2551_par6_par8.png|thumb|x200px|Drift time fit parameter 6 vs parameter 8]] | ||
|} | |} | ||
+ | |||
+ | Second pass over data for straws with a successful fit, tmax edge slope < 35 and number of hits > 100 | ||
+ | <pre> | ||
+ | T->Scan("N","par6<35&&!status&&entries>100"); >batch.sh | ||
+ | </pre> |
Revision as of 10:04, 24 March 2015
Fit function: TF1 *g2 = new TF1("g2","[0] * (1 + [1]*exp(([3]-x)/[2]) + [7]*exp(([3]-x)/[8]) ) / ( (1+exp(([3]-x)/[5])) * (1+exp((x-[4])/[6])) )"); [0] overall height [1] amplitude of 1st exp contrib to peak [2] first exp fall-off [3] t0 [4] tmax [5] slope up of t0 edge [6] slope down of tmax edge [7] amplitude of 2nd exp contrib to peak [8] second exp fall-off
Fit statistics from first pass over data with ~5k counts per straw
Second pass over data for straws with a successful fit, tmax edge slope < 35 and number of hits > 100
T->Scan("N","par6<35&&!status&&entries>100"); >batch.sh