Minutes of the Testbeam Meeting, held Tuesday May 7, 2003
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 (Present:  ML, NK, TI, MF, TS, RK, IG)


 Michel stressed the point that our testbeam meetings are to be
 held every week and are not to last longer than 1 hr.
 They are meant to exchange information on testbeam issues.

 Richard requested to have "questions and answers" as one of the
 standing items on the agenda, so the group can help out
 if somebody has a problem with how to tackle something.

 ---

 Michel told us what work is being done at MPI:

   During the last LAr week, there was a presentation by Hendrik Bartko,
   who is working with Sven at MPI. His slides are on the web:

   http://agenda.cern.ch/fullAgenda.php?ida=a03712

   Hendrik presented results on the Energy reconstruction and position
   reconstruction for electrons as well as energy reconstruction for
   pions.
   He also did a noise-reduction analysis with digital filtering
   and had some preliminary e/pi results.

   Work is also being done on out-of-phase events.
   These are cases where it appears that the DAQ is reading blocks
   from different events for HEC, EMEC, TDC and MWPC. It is unclear at the
   moment how extensively we are affected by this kind of data structure error
   and whether it will be possible to find a satisfactory patch for it.

   Sven looked at the hadron resolution of pions and plotted it as a
   function of event number. He found that there can be a jump in the
   resolution during the run, which could be an indication of data
   block mix-up from different events.

   It is still unclear how often this happens.
   Apparently Sven also found that the first recorded spill of
   each run is out of phase.

   We assume that this should only affect data analyses which rely
   on any correlation between any of the: EMEC, HEC, TDC, BeamChambers.
   Richard pointed out that the average energy sum per spill should
   show whether there is a problem.


Naoko mentioned that version 6.1.0 might be ready by the end of this week.
It will use the next compiler version (gcc3.2).


Batch jobs:

  The question came up whether there is a difference between "qsub" and "bsub";
  nobody really knew...

  Michel and Ian will be working on setting up a Perl script
  that will allow running through multiple runs in athena.

  Ian is focusing already on working on TBRootAna.  He has resurrected
  last year's version, which now runs on dragon and on the fates.  He
  will send us an email with the web address where we can find
  instructions on how to use it.  He is now moving on to design the
  package to be used with the new Ntuple structure.  Ian pointed out
  that at present we are running a two year old version of root.
  (Richard suggested that for these software package we should have
  something like a dev, pro and old version of the package, so that
  established analyses won't be compromised, but developments can be
  done on new packages.)
 

Geant:

  It was found that the MPI Geant web-site contains G3 simulated "data" files.
  The G4 coding is apparently done and simulations have started.