[Brahms-dev-l] Fw: auau-200

I decided to forward this to the devlist since the reason for the MRS
problems are that the
vdrift calibration for run 9660 which covers 9660-9872 is completely wrong .
just check the DB.
Again this shows that calibration must be checked before just being inserted
into the DB
where the effect are severe for all people. as a consequence of this I am
tempte to delete all generate
runs in the period (9669-9872) ~ 40 runs.

If someone (eunjoo could quickly calibrate the tpm1 for 96600 it would be
much useful) of course it it
not reasonable to use the same Vdrift for so many runs.

Flemming


----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "flemming videbaek" <videbaek@rcf.rhic.bnl.gov>
To: "Eun-Joo Kim" <ejkim@ku.edu>; "flemming videbaek" <videbaek@bnl.gov>
Cc: "Sanders , Steve" <ssanders@ukans.edu>; "JH Lee" <jhlee@bnl.gov>; "Erik
Bjorn Johnson" <ebj@ukans.edu>; <hito@bnl.gov>; "Ouerdane Djamel"
<ouerdane@nbi.dk>
Sent: Friday, August 13, 2004 6:11 PM
Subject: Re: auau-6200


>
>
> Hi,
> Well this clearly illustrates that we have to check stuff carefully. A few
> comments
> - the bb software has been change by hiro since April, so this may explain
> why the macth is no good
> (It is better in many ways discarding hogh pulses in large tubes, now the
> default is to use all tubes, and nor only small,bib,.. etc).
>
> - The Ty offset I assume you talk about the 0.7 cm that we have seen for a
> long time. I am very tempted
> to artificially move the y-position by this amount since it will make both
> Ty and matching better.
> - The offsets and widhts are calcualated by 'new' automatic methods maybe
> this is a problem.
> -It will be most helpfull if you can illustrate the point in more details.
A
> description 'strange momentum'
> does not help much in identifiing a problem. how does the cuts
> 'dang-dang_accp, dy-... etc look.
> - what does completely off mean.
>
> regards
>     flemming
>
>
>
> > Dear Flemming,
> >
> > gtr9841 which I made in June 7 looks better.
> > The webpage for calibration revision check showed
> > bbVertexOffset, adc, slew were done in Apr. 21.
> >
> > The file you generated today shows strange MRS momentum
> > distribution, too. And Ty is completely off.
> > Matching offset, too.
> >
> >
> > Eun-Joo
> >
> >
> >
>


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