If we can exercise the holding fields today, we will fix the readout. I
propose that we move the readout to another IOC (dtun1) for all four
holding field readbacks. We need to coordinate with Vitaly or Nick on
this effort.
TZ
Adrian T Sindile wrote:
>
> 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.
>
> People are very confident the angle is 45 degrees - I did the simulations
> for 22.5 degrees anyway...
>
> Adrian
>
> > 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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