[Brahms-dev-l] Re: efficiencies

Hi,
As requested by Flemming I'm sending the link to my brahms analysis 
web-page.
It is http://zefir.if.uj.edu.pl/staszel/brahms/
If you want to look at the latest efficiency analysis click on "FS 
efficiency (new)"
and then choose the sub-subject you are interested in.

Regarding out discussion during the meeting on Ffs efficiency:
Please make a look at
 http://zefir.if.uj.edu.pl/staszel/brahms/fseffic/correct/T2Eff_2deg.gif
which shows T2 efficiency versus the cut on sigma range for AuAu at 2 
deg, "1723" field, which
seems to be the most critical case due to the background.
Here is a same plot for 4 deg:
http://zefir.if.uj.edu.pl/staszel/brahms/fseffic/correct/T2Eff.gif

I think that 10-12 sigma range cut accounts for what we would call 
"true" efficiency.
The background level is seen from the difference between "one hit" and 
"all hits" lines but
one has to remember that the "one hit" counted line is affected by 
background on the
level of ~ (1-"realeffic") * ("all hits" - "one hit"), where 
(1-"realeffic") ~ 0.01 so the effect is very small.

Cheers,
Pawel.


Flemming Videbaek wrote:

> Hi Pawel,
>  
> could you broaodcast the link to your effeciency web-page. I am sure I 
> have it somewhere, but please do so.
>  
> Flemming
>  
> --------------------------------------------
> Flemming Videbaek
> Physics Department
> Bldg 510-D
> Brookhaven National Laboratory
> Upton, NY11973
>  
> phone: 631-344-4106
> fax:        631-344-1334
> e-mail: videbaek @ bnl.gov


-- 
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| Pawel Staszel                                                        |
| Jagiellonian University                                              |
| Institute of Physics            email:      ufstasze@if.uj.edu.pl    |
| Reymonta 4                      phone:      (+48) 12 663 5712        |
| Krakow 30059                    FAX:        (+48) 12 633 7086        |
| Poland                                                               |
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