Re: [Brahms-dev-l] Drift velocity calibrations

Hi Flemming, Steve

    you are right, the problem was the bad drift velocity picked up
from the database. Your suggestion solved the problem, I managed to 
calibrate all the runs. I need to have the following files to be
removed and brat rebuilt again so that I can finish with the 
calibrations and go on to make the ltr files:

/opt/brahms/new/share/brat/params/mult/BrCalibrMult_12682.dat
/opt/brahms/new/share/brat/params/mult/BrCalibrMult_13414.dat

These files seem to be corrupted.

Selemon,

-----Original Message-----
From: Flemming Videbaek [mailto:videbaek_at_bnl.gov]
Sent: Sat 3/3/2007 2:13 PM
To: Bekele, Selemon; brahms-dev-l_at_lists.bnl.gov
Subject: Re: [Brahms-dev-l] Drift velocity calibrations
 
Hi Selemon,

The problem is the Vdrift is still read from the Database so it has a bad values.
The way to fix this, and in fact the calibrateFibDrift.C script should have this set-
but in former times we never tried to calibrate runs with BAD entries in the DB
(again the quality issue that someone commited BAD calibration, rather than just leaving them alone !)
In the script should should add
tpcCalModule->SetUseDriftVelocity(kFALSE) ;
then the module read the default parameter valut of 0.016 for vdrift from the acsii file, and I strongly suspect this will
work

--------------------------------------------
Flemming Videbaek
Physics Department 
Bldg 510-D
Brookhaven National Laboratory
Upton, NY11973

phone: 631-344-4106
cell:       631-681-1596
fax:        631-344-1334
e-mail: videbaek @ bnl gov
----- Original Message ----- 
From: "Bekele, Selemon" <bekeleku_at_ku.edu>
To: <brahms-dev-l_at_lists.bnl.gov>
Sent: Saturday, March 03, 2007 1:38 PM
Subject: [Brahms-dev-l] Drift velocity calibrations


> 
> Hi,
> 
>  I made plots of the x and y position distributions for T1 hits. The x
> distributions are OK but the y distributions are empty which was the reason
> to do the calibration with the T2 fibers. I was getting empty adc distributions 
> for the T2 fibers.
>  Then, I run the calibration for T2 and found that the adc distributions are OK. 
> Then I checked  BrTpcDriftFibCalModule to see where thingis go wrong and 
> found that the  track tables for the runs are empty for T1. The adc distribution 
> are filled only if there tracks.
> 
> I have updated (added some more plots) the material I posted on the agenda page for last friday. 
> 
> Selemon,
> _______________________________________________
> Brahms-dev-l mailing list
> Brahms-dev-l_at_lists.bnl.gov
> http://lists.bnl.gov/mailman/listinfo/brahms-dev-l
>

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