[Halld-offline] Minutes, GlueX Offline Software Meeting, April 4, 2012

[Mark M. Ito]

Find the minutes, from David, at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_4,_2012#Minutes 
and below.
_____

GlueX Offline Meeting, April 4, 2012
Minutes

    Attendees: David L.(chair), Simon T., Beni Z., Matt S., Kei M., Nathan
    S., Paul M., Will L.

Announcements

      * Elliott: TDR will be reorganized a bit at the top level to better
        fit the function of the document.
      * PWA school at W&M: 3 weeks
      * GEANT4: 1 week school presented by GEANT4 authors (3 SLAC, 1 LHC)
        July 7-13

Calorimeters (Will)

    Still places in code that refer to rad hard glass in FCAL. It has been
    fixed. Affect at low angles. Improves resolutions a bit (as expected).
    Also slightly better efficiency.

Tracking (Simon)

      * FDC 4th package now 20 cm closer
      * Material maps modified to include more precomputed values (MULS
        related)
      * Tracking chi-sq still seems pretty flat with large spike at zero
        (0.1-6.1 GeV/c pions)
      * Tracking parameter residual plots look good overall with errors
        still off for very forward going tracks
           + Material map improvements have helped
      * Backward angles still problematic regarding residuals and errors
      * Looked at pi+pi- events from rho decay.
           + CL from kinematic fit looks very good, but still has spike at
             zero
           + Found paper Simon thinks may have been basis for our
             CLAS-inherited kinematic fitter
           + Assumed pi0 missing mass (did not use reconstructed photons)
           + Fitter only uses px,py,pz parameters in fit (does not fit
             position parameters)
           + Also did a set of b1pi events. (CL also looks good)

PID (Paul)

      * Igor noticed problems with reconstructed beta (Paul saw similar
        issues)
      * TOF hits are rarely reconstructed due to tiny energy deposition.
      * Beni suggested low energy hits are backsplash from calorimeter
           + Paul: That may be, but there are hardly any hits from TOF
      * Matt noted that a 2007 MC study he did had a MIP peak closer to
        what is expected (few MeV)
      * FCAL timing is slightly off (known issue).
           + Causes beta to be systematically off.
      * BCAL beta has problems because of reconstructed start time of
        event.

Offline Software Review Planning (David)

    Two slides were prepared for a multi-hall Software Review Preparations
    meeting on Tuesday next week. One deals with "Tight Spots and
    Weaknesses" and the other outlines our Management Plan.

    Elliott emphasized the likelihood of manpower being drained for the
    online activities in the tight spots slide.

New JANA release (David)

      * A new JANA release is out (version 0.6.4)
      * Several bug fixes and feature enhancements (no fundamental changes
        to core functions)
      * Xerces 3 support is available in the new version.
           + Simon noted that HDDS still does not compile against xerces 3
           + David noted that this is due to "read only" nodes being added
             in version 3. It's not clear at this point whether the problem
             is easily fixed, or requires a major rewrite.
           + Richard should be contacted to see if he can have a look.

Misc

      * We looked briefly at the Mantis tracker system.
      * Everyone was encouraged to review their tasks periodically and to
        assign unassigned tasks as appropriate.

    Retrieved from
    
"https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_April_4,_2012"


-- 
Mark M. Ito
Jefferson Lab (www.jlab.org)
(757)269-5295