Hi, Chi!
Thanks for looking into this.
It looks like the beam gated charge for (-) helicity is pretty close
(your version and mine are VERY close) for all three codes.
For (+) helicity, your answer is like mine for beam gated scalers (the
important number) and close to charge.C for ungated... which is kind of
funky. Which brings the question: do you see any (+) helicity in the
physics (not scalers) events? I did not for that run... this would
probably answer the questions completely...
Thanks!
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/
On Wed, 14 Jan 2004, zhangchi wrote:
>
> Ha!
>
> Just to add to the confusion: here's integration of my code(new version of
> lrn)
>
> -----------------------------------------------------------------------
> Scaler charge (C) BEAM/TGT-VECTOR states BEAM/Unpol
> (+/+ +/- -/+ -/-) (+/u -/u)
> beamgated 0 0 11.4088 0 0 0
> not gated 1.6469 0 13.0770 0 0 0
> -----------------------------------------------------------------------
>
> typically, the beamgated charge integrated by charge.C is a tiny little
> bigger than it should be. This is due to the fact that between fills,
> LDCCT reads 0 but the calibration used to translate LDCCT into mA does not
> give 0mA for 0 LDCCT. for this run, compare charge on -/+, the error
> caused by this is ~0.1C out of 11C.
>
> I put a hack in the charge integrater in library that stops charge
> integration if scaler rate is absolutely 0. so my gated charge is less
> than charge.C.
>
> about the charge on +/+ state, no idea, ofcourse everyone thinks himself
> right. :) but mine seem to be a "averaged" version of the other two.
>
> Chi
>
> On Tue, 13 Jan 2004, Adrian T Sindile wrote:
>
> > with my code:
> > -----------------------------------------------------------------------
> > Scaler charge (C) BEAM/TGT-VECTOR states BEAM/Unpol
> > (+/+ +/- -/+ -/-) (+/u -/u)
> > beamgated 0 0 11.4221 0 0 0
> > not gated 0 0 12.9684 0 0 0
> > -----------------------------------------------------------------------
> >
> > The charge-3697.chg file has:
> > -----------------------------------------------------------------------
> > Scaler charge (C) BEAM/TGT-VECTOR states BEAM/Unpol
> > (+/+ +/- -/+ -/-) (+/u -/u)
> > beamgated 1.25993 0 11.537 0 0 0
> > not gated 1.64705 0 13.1053 0 0 0
> > ------------------------------------------------------------------------
> >
>
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