[Halld-offline] New default field map

[David Lawrence]

Hi All,

    I have just committed a revision to the repository that changes the 
default B-field map for the solenoid from the ANSYS generated map to the 
POISSON generated map (see log below for justification).

    This should only impact you if the following are true:

1.) You run reconstruction code checked out from revision 5600 or later
2.) Your hddm file was created with an hdgeant made from code checked 
out prior to revision 5600.
3.) You are doing full charged tracking reconstruction (i.e hdparsim 
doesn't count)

Even if you do accidentally reconstruct with the POISSON map from MC 
data produced with the ANSYS map, you will likely not notice much since 
the 2 maps are very similar.

The new POISSON map is now in the "calib" section of the repository so 
you will need to do a "svn update" in your local calib directory to get 
the new map.

Please let me know if you run into any trouble, questions, comments.

-David

-------- Original Message --------
Subject: 	r5600 - trunk/src/libraries/HDGEOMETRY
Date: 	Tue, 13 Oct 2009 14:06:46 -0400
From: 	Hall-D.SVN.Repository at jlab.org
To: 	davidl at jlab.org, brash at pcs.cnu.edu, wolin at jlab.org, 
zisis at uregina.ca, mashephe at indiana.edu, remitche at indiana.edu, 
zihlmann at jlab.org, somov at jlab.org, staylor at jlab.org



Author: davidl
Date: 2009-10-13 14:06:45 -0400 (Tue, 13 Oct 2009)
New Revision: 5600

Modified:
   trunk/src/libraries/HDGEOMETRY/DMagneticFieldMapCalibDB.h
Log:
Switching default from Ansys generated map to Poisson/Superfish generated map.
This is motivated by the fact that the Poisson map appears smoother as a function
of R and that the Ansys map shows a distinct 'step' at r=few cm that intuitively
seems unphysical.




-- 

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 David Lawrence Ph.D.
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