Margret
reported that she is working on converting Geant Ntuples into
Ntuples of testbeam format. She ran into several problems
with Naoko's Ntuple conversion package and hope that they will be resolved
by the end of the month.
She also got together with Ian Gable to look into the version
problems for Minuit/TBRootAna. Ian suspects that it has to do
with compiler issues.
Re-compiling TBRootAna with the version under which Minuit
runs does not solve the problem. So for the moment, everything
continues to run as before (by issuing `source newenv' before running
TBRootAna, and running Minuit in the default environment).
Tayfun
now has all the tools/macros ready to access any information he
wants in his run-characteristics Ntuple, and to select runs
for his analysis based on that information.
Michel pointed out that his next aim should be to find out how
to produce new Ntuples with Naoko's new set of weights. That way
he won't have to do timing corrections and get better results
than if he would have applied corrections. We should find out from Naoko
what is involved: Do we just need a new weights file? Or do we
need a whole new version of the code (if so, is it committed yet?)?
Tayfun said he'd contact Naoko on how to go about.
As to HV corrections in the EMEC, Michel mentioned that based on
Margret's calculations for radial dependent module properties,
Naoko prepared a routine in TBRootAna that started to look at HV corrections
as a function of gap-thickness and HV applied. The effect is likely to be
very small, but it will be interesting to see whether we are actually
able to see any effect at all.
Tamara
looked deeper into the asymmetries due to HV problems that are reported
by the MPI group. She still doesn't see any effect. Michel pointed
out that this is very likely due to the fact that in the case of
the MPI analysis, the shower straddles two modules, so there
actually is some energy in the central module as well as in
one of the outer modules most of the time. In Tamara's case,
the beam hits the central module in the middle, with very
little energy (if any) deposited in the outer modules. In that
scenario, of course, it is not very likely to measure an asymmetry.
Michel
reminded Tamara and Tayfun to prepare a proposed outline for
their planned talks at the WRNPPC04 at lake Louise.