Minutes of the UVic Testbeam meeting held Friday, November 28 2003
(present: TI, TH, AA, ML, RK, MF)

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.