Hi,
I remember overhearing conversation between vitaliy, tancredi and CCR
about transversal holding field read back problem, which makes it look
like the holding field is at 22 degrees although it is in fact 45.
Vitaliy, please correct me if this is not the case.
Chi
On Tue, 12 Aug 2003, Adrian T Sindile wrote:
> Hi!
> Some time ago I sent out a few Monte Carlo plots I did in order to educate
> myself... in them, I was showing reconstructed Monte Carlo epel asymmetry
> (so they were not simply theoretical curves, I followed pretty much the
> analysis chain - using blastmc generated files instead of real data).
>
> Today, because the ABS target display in the counting bay was showing a
> holding field of about 22 degrees (not 45, as we think we are running)
> Ricardo asked me to redo the simulations for a target holding field of
> 22.5 degrees.
>
> I am attaching both the older 45 degree picture (Asymmetry.ps) and the
> 22.5 degree picture (Asymmetry_225.ps) for comparison.
>
> I think this comparison shows how important it is to know the holding
> field angle precisely... but everybody knows that. If the angle is around
> 20 degrees, the right asymmetry goes from plus to minus (like we are
> seeing in real data!)...
>
> Adrian
>
>
> -------------------------------
> Adrian Sindile
> Research Assistant
> Nuclear Physics Group
> University of New Hampshire
> phone: (603)862-1691
> FAX: (603)862-2998
> email: asindile@alberti.unh.edu
> http://einstein.unh.edu/~adrian/
>
>
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