STAR Flow, Chirality and Vorticity PWG

[Dmitry Arkhipkin <arkhipkin AT bnl.gov>]

100,000,000 Amps is the STAR EPICS default when no magnet current data 
is available from CDEV. EPICS cannot return "no value", so STAR Slow 
Controls services use 100,000,000 to indicate issues. With such a strong 
magnetic field, there should be ~zero reconstructed tracks in the event 
(unless there are lasers).

Since it is the CDEV data distribution server that is gone bad, there is 
no way to restore values. Even CAD archives will likely not have them.

-Dmitry

On 2022-10-21 21:36, James Dunlop wrote:
> Oh, and the shiftlog say (bracketing those  run numbers)
> <quote>
> 01:03
> General
>
> MCR called to tell me that they had reset the CDev server, however our
> magnet current alarm state is still red. The magnet is actually fine,
> so we will keep running and just keep an eye on the magnet currents.
> </quote>
> and
> <quote>
> 08:23
> SlowControls
>
> Magnet current readings in slow controls fixed after CDEV reset during
> the night.
> </quote>
>
> So, easiest is to mark all runs from 19158001-19158020 bad.  They are 
> likely
> not reconstructed correctly with the assumption of a gigantic magnetic 
> field.
> You may see quite an interesting momentum spectrum....
>
> --J
>
>
>
>
> > On Oct 21, 2022, at 9:24 PM, James Dunlop <dunlop AT bnl.gov> wrote:
> >
> > Hmm.  That's  interesting.   There's something wrong  with the 
> > magnetic field readout
> > for that run.  If I look at the runlog
> > https://online.star.bnl.gov/RunLogRun18/index.php?r=19158007
> > it says
> >
> > STAR Magnet       100,000,000.0 Amps
> >
> > which would be pretty impressive if it were real :)
> >
> > this seems to last between runs 19158001-19158020
> > where 19158001-3 are  at -100  MAmps
> > and 19158006-20 are at +100 MAmps
> >
> >
> >
> > > On Oct 21, 2022, at 6:54 PM, Eugenia Khyzhniak via Star-fcv-l 
> > > <star-fcv-l AT lists.bnl.gov> wrote:
> > >
> > > Hi All,
> > >
> > > I'm working with a 27GeV_production_2018 dataset. I found that this 
> > > dataset contains Full and Reverse Full Field data. However, according 
> > > to the RunLog page, we should not have data for the Full Field in 
> > > this dataset at all. Also the RunLog page states that these files 
> > > must belong to the Reverse Full Field.
> > > Here is few examples:
> > > /home/starlib/home/starreco/reco/27GeV_production_2018/FullField/P19ib/2018/15/19158007/st_physics_19158007_raw_2000001.picoDst.root
> > > /home/starlib/home/starreco/reco/27GeV_production_2018/FullField/P19ib/2018/158/19158007/st_physics_19158007_raw_2500001.picoDst.root
> > > /home/starlib/home/starreco/reco/27GeV_production_2018/FullField/P19ib/2018/158/19158007/st_physics_19158007_raw_3000001.picoDst.root
> > >
> > > I'm confused. Does anyone know what is happening here?
> > >
> > > Thank you,
> > > Yevheniia (Eugenia) Khyzhniak
> > > _______________________________________________
> > > Star-fcv-l mailing list
> > > Star-fcv-l AT lists.bnl.gov
> > > https://lists.bnl.gov/mailman/listinfo/star-fcv-l
> >
> > --
> > He/Him/His
> > Please do not feel obligated to respond to this message outside of 
> > your work hours.
> > James C Dunlop  Ph.: (631) 344-7781
> > Building 510A           Cell: (631)316-8153
> > P.O. Box 5000           Fax: (631) 344-4206
> > Brookhaven National Laboratory
> > Upton, NY 11973
> > dunlop AT bnl.gov
>
> --
> He/Him/His
> Please do not feel obligated to respond to this message outside of
> your work hours.
> James C Dunlop  Ph.: (631) 344-7781
> Building 510A           Cell: (631)316-8153
> P.O. Box 5000           Fax: (631) 344-4206
> Brookhaven National Laboratory
> Upton, NY 11973
> dunlop AT bnl.gov