Re: [BLAST_ANAWARE] offsets to db ->problems

From: Peter Karpius (karpiusp@einstein.unh.edu)
Date: Fri Apr 09 2004 - 11:14:33 EDT


Yeah, we thought about this Chris but then you are back to not doing
things run-by-run which I think was the objective. But this is still a
good idea.

                        Pete

On Fri, 9 Apr 2004, Chris Crawford wrote:

> hi pete,
> if the the paddle nuber is >=4, then i can try calibrating those runs
> specifically from the cosmic data right in the run. not sure how many
> runs you would need to lump together to get a decent signal, but it's
> worth a shot.
> --chris
>
> Peter Karpius wrote:
>
> >After meeting with Adrian, I grabbed his TOF monitor code and have quickly
> >modified it to calculate TDC offsets based on Chris' HZ cosmic coplanarity
> >numbers and the flasher ch 1000. Here is the problem. We have had broken
> >fibers in the past at different tofs at different times. These were
> >repaired but there is of course no flasher data for those runs. Therefore
> >I do not think it is practical to go back and try to calculate offsets for
> >these old runs as we will get garbage numbers for any channels missing
> >flasher data.
> > I this problem arises in the future, the only work around plan is
> >to first read in an existing blast.sc_cal, then if the flasher is good,
> >calc the new offset, if the flasher is bad, use the offset from
> >blast.sc_cal - which hopefully is better than no offset at all.
> >
> > Any thoughts on this?
> >
> > Back on Vector EL Asym,
> > Pete
> >
> >
> >
> >----------------------------------------------
> >Pete Karpius
> >Graduate Research Assistant
> >Nuclear Physics Group
> >University of New Hampshire
> >phone: (603)862-1220
> >FAX: (603)862-2998
> >email: karpiusp@einstein.unh.edu
> >http://pubpages.unh.edu/~pkarpius/homepage.htm
> >----------------------------------------------
> >
> >
>
>

----------------------------------------------
Pete Karpius
Graduate Research Assistant
Nuclear Physics Group
University of New Hampshire
phone: (603)862-1220
FAX: (603)862-2998
email: karpiusp@einstein.unh.edu
http://pubpages.unh.edu/~pkarpius/homepage.htm
----------------------------------------------



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