Re: reduced data and drift velocity calibrations

From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Wed Jun 05 2002 - 10:10:32 EDT

  • Next message: Ian Bearden: "RE: reduced data and drift velocity calibrations"

    Two comments to this discussion:
    
    It  has ben agreed that in general we should remove all event files
    generated in previous first passes
    i.e. generating only local tracks and copying other relevant datastructures.
     This has two positive effects
    cleaning up disks and making it clear that files found there are the most
    valid.
    Could we possible agree on a somewhat more specific setup that done at this
    moment
    the data14 is organized as
      /brahms/data14/data/reduced/ - jsf
                                                    - log
                                                     - reduced/ R<runno>
    Could the data/reduced be name eg. data/pass0_2001  or data/level0_2001 - I
    am open good ideas for consistent
    naming such that we can see these are the official passes and be
    distinguished from files like
    dataxx/igb/R... data/pp/Rxxxx etc. I would encourage people who actually
    generated files that they know are not optimal i.e. no good gets deleted so
    we can have a coherent effort.
    
    Could we also save the officiual production scripts that now resides in
    peoples private directories e.g. create for proper documentation
    a brahms_app/reco_apps/pass0_reduce/ and have in CVS, together with any
    other setup needed. We can then expand this for the calibration scripts etc.
    
    -- Specific request for the reduction script
    Djam, could you please add the following copy objects
    " DigTof TMRS"
    "DigTof TMrsB"
    "DigTof TMrsF"
    
    They are of course only relevant for the PP running so nothing has to be
    redone.
    
    --
    Second comment:
    I will like to have some discussion on the Vdrift calibration on T2(T1). I
    have seen the plots from
    Pawel that shows a small difference between the Y(T2) and projected Y(T3) to
    T2 in the order of 0.01 in Vdrift.
    It is not priory obvious what is the better value being sensitive to
    slightly different effects (the projections to the
    fibers depends on the . One should though keep  in mind that projecting to
    in particular T1 is a long projection over 6 meters -
    this couls be checked by looking at the T3 projection to the fiberplane(s)
    and getting the local Y for the T3 tracks that has
    signals in the fibers just as for the T1,T2 local tracks.
    Certainly one lesson from the Tpm2 vdrift from the fibers was the front/back
    gave different values.
    
    
    ------------------------------------------------------
    Flemming Videbaek
    Physics Department
    Brookhaven National Laboratory
    
    tlf: 631-344-4106
    fax 631-344-1334
    e-mail: videbaek@bnl.gov
    ----- Original Message -----
    From: "Djamel Ouerdane" <ouerdane@nbi.dk>
    To: <brahms-dev-l@bnl.gov>
    Sent: Wednesday, June 05, 2002 5:11 AM
    Subject: reduced data
    
    
    > Hi all,
    >
    > /brahms/data14 is 100% full because of the reduced data stored in
    > /brahms/data14/data/bad
    >
    > This dir is named bad because some (not all) of the data was reduced with
    > wrong detector parameters (e.g. TPC stuff completely obsolete).
    >
    > Are there some people using this data ? As far as I know, the FS part
    > should be ok although I don't garanty it. If no one's using it, I'd like
    > to remove it. Some new TPC calibrations were done these last 2 days,
    > implying that the data should be reprocessed.
    >
    > Djam
    >
    >
    > --
    > Djamel Ouerdane ------------------------------------------o
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    >
    



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