[Eg6_analysis] DC calibration issues

[Lamiaa El Fassi]

Hi all,

In the cooking that I did yesterday for the DC_SWAP test I did changed the
fitting parameters
of the DC histograms to be similar to the dc3 program. This test includes
the whole files of a
run 61695. The new fit results of the first ten files of this run can be
compared with the previous "pass0_v1" cooking of the same run. You can
access the last and new fit results on the following
link:
http://www.jlab.org/Hall-B/secure/eg6/cooking/online_sql/mon_r61695.html
The two tables on this link stand for: old cooking "pass0_v1" and new
cooking "pass0_dcs3".
However, the x-axis of all pictures are showing a file's extension instead
of a run number since
the comparison is including just one run "61695".

Best regards,

Lamiaa

************************************************************
*  Lamiaa El Fassi             email: elfassi at jlab.org
*  Research Associate @ Rutgers University
*  Phone: (757) 269-7011 // Fax: (757) 269-5703
*  Jefferson Lab., 12000 Jefferson Ave.
*  Suite# 4, MS 12H3
*  Newport News, VA. 23606
************************************************************


On Mon, Dec 6, 2010 at 7:50 AM, Stepan Stepanyan <stepanya at jlab.org> wrote:

> Hi Seema,
>
> Thanks for looking into this. I do not think initial
> setting of parameters will effect much. In user_ana
> "B" in the fitting option and "0" for number of parameters
> means that initial value of parameters are recalculated.
> The straight forward check is to fit the same histogram
> with both settings and see if there is a difference.
> You can take one of histograms from cooked monitoring
> histograms and fit with settings in dc3.
>
> Stepan
>
>
> On 12/5/10 5:01 PM, seema at jlab.org wrote:
> > Hello Everyone,
> > I have checked once again the fitting function used in dc3  and user_ana
> > software. Although double gaussian is used in each case but the starting
> > parameters are not allowed to vary freely in user_ana and that may be the
> > reason for inconsistency in time residual means.
> >
> > Functional form used in user_ana
> >
> > call hfithn(hid,'G+G','QB',0,ggpar,step,pmin,pmax,eggpar,chi2)
> > ggpar(1) = 50000
> > ggpar(2) = 0.
> > ggpar(3) = 0.02
> > ggpar(4) = 10000
> > ggpar(5) = 0.
> > ggpar(6) = 0.1
> >
> > Functional form used in dc3
> >
> > hfithn(HID,"g+g","Q",6,PAR,STEP,PMIN,PMAX,SIGPAR,&CHISQ);
> >
> > PAR[6] = {500.0, 0.0, 0.0300, 50.0, 0.0, 0.100}
> >
> > Please notice the extra  'B' option selected in user_ana and also the
> > starting parameters are different!
> >
> > Best regards,
> > Seema
> >
> >
> >> Dear all,
> >>
> >> due to various activities, Hall closing, PAC deadline and so on,
> >> tomorrow's eg6 meeting is canceled.
> >>
> >> Stepan
> >> _______________________________________________
> >> Lowq mailing list
> >> Lowq at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/lowq
> >>
> _______________________________________________
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>
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