Margret
reported that she made some progress on the conversion of G4-Ntuples
to testbeam-Ntuples. There are still some entries that need to be included
before the converted Ntuple can be used in TBRootAna, but that shouldn't
pose any major problems.
Next she wants to see whether she actually understands the
the entries that are provided. A discussion arose over the most likely
meaning of the content of the entries in the G4 Ntuple. Margret is supposed
to find out.
Margret also generated a couple of G4 runs as well as pulled over one
run from the MPI web-site. She is planning to compare the two
to see whether they give similar results. Another item on her list
is to see where various elements (Geant volumes) are located in space
and to make simple changes as a practice on how to move material into
the beam (useful for the material runs).
Michel pointed out that of real importance is to find out how to connect
or disconnect the HV of individual channels.
Tayfun
has sent an email to Naoko w.r.t. the new weights. Naoko is in Japan
right now, but she sent an email on Thursday with some instructions
for Tayfun. Tayfun arranged the required Athena upgrades, but wasn't able
to run it yet, due to the network problems we had this (Fri.) morning.
Michel pointed out that Rob reported that Sven has now looked at Naoko's FFT results
and is convinced that her approach is the way to go.
Richard suggested that once Tayfun gets the code running to
apply Naoko's routines to some runs and see whether it works.
Tayfun also expressed curiosity to see whether some of the events
that are flagged as `bad' in his run selection routines
will emerge as `good' after they have been treated by Naoko's method.
Tamara
is working on the HV corrections. She is looking for runs that
are truly straddling two modules and finds that she will have to
go to the position scans to obtain a useful run.
A discussion arose over a figure in the MPI draft that plotted
E1/E2 of the HEC vs. x-position. This plot is supposed to illustrate
the reduced response in the central module due to HV problems.
Another question w.r.t. the central/outside asymmetry response plot came up:
What would this plot look like if there were no HV problem present?
Would that really result in a flat distribution? It would be
really useful to have some MC simulated events to understand this.
Alan pointed out that the description of the longitudinal hadronic
shower shape would have to be correctly modeled in the MC, and
he expressed worry over how to find HV problems that are no shorts in
the running ATLAS experiment.
Richard also wondered whether any tests have been performed on the
central HEC module after the beam test, to find out which gaps
were actually off. Or were there tests, but they didn't find anything wrong?
Also: Will this module go back into the next testbeam in 2004?
Michel will quiz Chris on those points.