Re: [Brahms-dev-l] DC calibration

Just a comment on rebuild - you may recall that the /opt/brahms/new is
updated every morning at ~ 1:00

/fv

----- Original Message ----- 
From: "Pawel Staszel" <ufstasze@if.uj.edu.pl>
To: "brahms-dev-l" <brahms-dev-l@lists.bnl.gov>
Sent: Tuesday, November 25, 2003 1:07 PM
Subject: [Brahms-dev-l] DC calibration


> I committed DC calibration for the entire p+p (RUN III).
> I also committed some important updates to DC tracking code and
> tag BRAT with the new revision number, now it is 2.12.13.
> I suggest to install this new brat version for the new local tracking.
> There are two important updates:
> 1. Calib. params of Td1 are retrieved from the db.
> 2. Added new option that allows to do the the fit to the residuals by
> applying the
> individual plane position resolution.  This was tested - the new option
> provides a better matching between tracks, but the improvement is not
> very dramatic.
> The disadvantage is that the resolutions are hardcoded and we don't have
> db entries
> for them. However, the relative plane resolutions don't change very much
> from run to run and
> I thing that the  hardcoded values are relevant to the entire p+p data
set.
> To enable this option one should add: dctrack->UsePlaneRes(kTRUE) in the
> dc tracking setup.
>
> Note, that it is important to use Td1 reference for pp data. To apply
this,
> one should add: dctrack->UseTd1Ref(kTRUE).
>
> Right now, I'm working on d+Au. For d+Au one should be very careful with
> the DCs, specially with T3 which
> was not so stable during d+Au due to the high background.
>
> Will keep you informed about the progress.
>
> Regards Pawel.
>
>
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>


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