[d2n-analysis-talk] Multi-Carbon Target With Transversity's Matrix Elements

[David Flay]

On Wed, Apr 28, 2010 at 10:43 AM, Brad Sawatzky <brads at jlab.org> wrote:

>  I presume the LHRS angle was set to 45 degrees?  Are the survey data on
> the LHRS incorported into our DB?
>

Yes, the LHRS was set to 44.985 deg.:
http://hallaweb.jlab.org/news/minutes/Survey_Reports/DT_A1235.pdf

I found this page for survey reports:
http://hallaweb.jlab.org/news/minutes/Survey_Reports/Survey_Reports.html

I was thinking that the information we need is from the reports from 8/3/09
(Spectrometer Pointing -- has entries from March -- August), 2/6/09 (Target
Ladder entry).  Do you remember the most recent survey report <just before>
d2n?  From looking at this page, it seems I need to look at a few different
ones to gather the proper information.

I was just talking with Jin concerning an offset with phi.  He suggested to
look at Hydrogen elastic runs and see where the elastic peak falls.  Then to
manually adjust the 0th matrix element for phi.  He mentioned I could try
with dp as well, but it may be best to play with phi first.

As for the offsets (Dx,Dy) referring to the offset of the central ray from
the center of the HCS, I'm starting to work on that -- they should go in the
db_run.dat file.

Dave

-- 
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David Flay
Physics Department
Temple University
Philadelphia, PA 19122

office: Barton Hall, BA319
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e-mail: flay at jlab.org
           flay at temple.edu

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