Difference between revisions of "CDC run 2551 drift time fits"
From GlueXWiki
| Line 1: | Line 1: | ||
| + | <pre> | ||
| + | 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 | ||
| + | |||
| + | </pre> | ||
| + | |||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|[[Image:cdc_run2551_t0.png|thumb|x200px|Drift time fit t0]] | |[[Image:cdc_run2551_t0.png|thumb|x200px|Drift time fit t0]] | ||
Revision as of 12:27, 23 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
