Richard

Richard reported on general items: Ashok (who was delayed for this meeting) made tremendous progress: He got Athena running on the fates! He produced an ntuple with 10 events. Tayfun had a look at it and found that all the entries were there, but he hasn't had time to check them out in detail.
Warren Shaw, who joined our meeting for the first time, is getting set up with a computing account at CERN.
For next week, we should all send an email to Michel about our travel plans for the foreseeable future, so we'll have some idea of who is going to be where and when.

Margret reported that she found out the the setup for the material runs is already implemented in LArG4TB. Using a visualization tool, she made the additional iron plates visible. The large walls in front pot the cryostat (Fe, Snit., Pb) are also present in the code, but their `holes' have been coded as long vertical slits. Margret sent an emails to Peter and Pavla to find out the proper size of the holes and just before the meeting got back an email from Andrei Grunion with his best knowledge of the hole sizes.
Margret also looked at leakage in terms of particle leaving the detector. She booked some histograms and plotted the xyz positions of the point in space where a particle is leaving the HEC, the energy of the particle as it is leaving the HEC, and the type of particle leaving the detector. Plotting the x vs y coordinates to the detector exit point of the leaked tracks leads to an outline of the detector boundary. This plot revealed that it is important to specify the option `hec-type=sa' when running the code. (Omitting this option implements the entire HEC wheel into the testbeam!)
Michel and Richard pointed out that Margret should concentrate on finding out how to get at the energies deposited in the cells by electromagnetic processes and by hadronic processes separately. She should also think about whether it would be a good idea to invite a LArG4TB expert to UVic or to go to Munich for a meeting, and to take action on that soon.

Tayfun had more updates on his phi modulation response. He showed the results of his event-by event phi-modulation-corrections of the x-position measured by the calorimeter and finds that the energy fluctuations in phi go down, but are eliminated. Michel pointed out that the position reconstruction in the calorimeter actually introduces a bias, which may be why the correction does not have a more dramatic effect..
Tayfun plotted the peak-to-peak height of the (energy response vs phi) plot against the beam energy and found that it has a linear dependence.
He also looked at the global time and finds that he has to do a very minor correction only - Rob and Naoko's treatment of the pulse-heights really improved things.
After applying the corrections Tayfun started to look at the systematics. He plotted sigma(x) vs. x and found a very distinct structure, with larger sigma(x) at the outer x-positions of the calorimeter. Michel thought that this might be due to leakage. Tayfun also plotted (x-mwpc - x-calo) vs. x-mwpc and finds a linear dependence. The general feeling that this would likely be due to geometric effects.
Tayfun will now continue his systematic studies.

Tamara looked at the details of the HV correction and will have results next week.

Ashok was tied up in another meeting and joined the testbeam meeting toward the end. He reported that he has been experimenting with Athena releases 7.5, 7.8 and 8.0 and found that all of them are working on Mercury. He produced an ntuple the night before the meeting. The only problem he encountered was afs timing out on Mercury, but that problem is not present on the fates, and besides, data can always be obtained via ftp.
The next thing he'll try doing is to checkout a package and modify the source code. Ashok also thinks that things would be a lot more stable if it we could bring the conditions database here.

Michel has explored running Athena within the ask (`Athena-Startup-Kit') environment, and gave us a very nice rundown on how to use it and how it compares to running Athena `the old way'. A somewhat updated version on the ask procedure that worked is given here:

How to run Athena from scratch, modify some code, using ask
% cd $HOME
% mkdir work
% cd work
Launch the athena startup kit
% ask
Checkout LArCalorimeter package
>>> checkout('LArCalorimeter', '8.0.0')
Set up the running environment
LArCalorimeter> setup()
For example, Checkout LArHECTBAna package
LArCalorimeter> checkout('LArCalorimeter/LArTestBeam/LArHECTBAna', '8.0.0')
Now you can edit a file, for example the file ${HOME}/work/LArCalorimeter/LArTestBeam/LArHECTBAna/LArHECTBAna-02-04-02/src/LArTBSignalBuilder.cxx
If you have edited a file, you can compile the LArHECTBAna package. The first time this can take some time since all files need to be compiled
LArHECTBAna> make()
You can find out what are the available jobOption files
LArHECTBAna> LArHECTBAna.scripts
Run Athena. Results in ${HOME}/work/LArCalorimeter/LArTestBeam/LArHECTBAna/LArHECTBAna-02-04-02/run
LArHECTBAna> run('share/LArHECTBAna_jobOptions_combined.txt')
You can then get out of ask with ctr^D

Next time you login, you do
% cd ${HOME}/work
% ask
>>> select('LArCalorimeter')
LArCalorimeter> setup()
LArCalorimeter> select('LArHECTBAna')
LArHECTBAna> run('share/LArHECTBAna_jobOptions_combined.txt')