Difference between revisions of "CDC run 2016 drift time fits"
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|+ drift time fits for a few straws from run 2016 (cosmics, magnet off) | |+ drift time fits for a few straws from run 2016 (cosmics, magnet off) | ||
| − | |[[Image:cdc_dtfit496.png|thumb|x200px|straw 496 t0 424ns tmax 998ns tdiff 574ns ]] | + | |[[Image:cdc_dtfit496.png|thumb|x200px|straw 496 (I12) t0 424ns tmax 998ns tdiff 574ns ]] |
| − | |[[Image:cdc_dtfit497.png|thumb|x200px|straw 497 t0 422ns tmax 988ns tdiff 566ns ]] | + | |[[Image:cdc_dtfit497.png|thumb|x200px|straw 497 (I13) t0 422ns tmax 988ns tdiff 566ns ]] |
| − | |[[Image:cdc_dtfit498.png|thumb|x200px|straw 498 t0 424ns tmax 983ns tdiff 558ns]] | + | |[[Image:cdc_dtfit498.png|thumb|x200px|straw 498 (I14) t0 424ns tmax 983ns tdiff 558ns]] |
| − | |[[Image:cdc_dtfit499.png|thumb|x200px|straw 499 t0 423ns tmax 841ns fall-off is too slow]] | + | |[[Image:cdc_dtfit499.png|thumb|x200px|straw 499 (I15) t0 423ns tmax 841ns fall-off is too slow]] |
|} | |} | ||
Revision as of 20:30, 18 December 2014
TF1 *f = new TF1("f","[0]*(1+[1]*exp(([3]-x)/[2])+[7]*exp(([3]-x)/[8]))/((1+exp(([3]-x)/[5]))*(1+exp((x-[4])/[6])))",400,1400);
f->SetParameter(0,20); //overall height
f->SetParameter(1,20); //amplitude of first exp contrib to peak
f->SetParameter(2,10); //first exp fall-off
f->SetParameter(3,550); //t0
f->SetParameter(4,1200); //tmax
f->SetParameter(5,2); //slope up of t0 edge
f->SetParameter(6,5); //slope down of tmax edge
f->SetParameter(7,3); //amplitude of first second contrib to peak
f->SetParameter(8,100); //second exp fall-off
