GLAST Calorimeter Software Weekly Reports
Week of 19 January 2004

NRL

Sasha:  This week I continued to update software in my computer to make working GlastRelease v3r3p7, EngineeringModel v1r030302p8 together with calibration package calibGen v0r1p1. By the end of the week all 3 packages compile and run, but there is still some mismatch in digiRootData version between EngineeringModel and calibGen, which probably could be fixed - to be discussed with Xin and Heather.

Andrey:  There's not really much I can report on this week.  I'm still running simulation code that produces "digi" files for different energies.. Next week I am planning to get this done and start with reconstruction with "fail modes" applied.

Mark:  Continued DC1 operations at low level.   Admin tasks.  (Very short week).

LLR

Pol:  See presentation on pedestal simulation.

Berrie:  See presentation on effects of energy deposition in diodes.

Bordeaux

Benoit, Johan:  Not much progress in the GSI data-analysis area, because of teaching duties.  The first comparison betwen the measured Z-selected deposition-energy distributions and those predicted by GEANT4+JQMD shows large discrepancies: the events with small charge changes are virtually absent in the calculations, while they are prominent in the data. We will get in touch with Tatsumi Koi to discuss this feature of the calculations.  If this were confirmed, JQMD would not be a heavy-ion simulator suitable for GLAST's purpose, as the nuclear-reaction rejection algorithms could not be properly established.

Thierry:  Nothing much on the JQMD simulations, spending time to convert the v5.xx to the new v6. At least things are compiling, but the results are junk.  Why keep trying?   Because the "old" JQMD is unable to run above 1 GeV/nucleon, while the "new" one can.

Montpellier

Some admin. tasks:  we all got an user ID from P. Nolan and looked at useful informations for GLAST beginners (mailing lists, VRVS, ICQ, ...).

GSI data analysis:  following a face-to-face meeting with Benoit in Paris, we focus on FRS calibration and EM data analysis

Frederic & Eric: event-builder transferred from Bordeaux along with some EM and FRS runs ; the code has been installed and Root trees created (some raw data has not been included in the FRS branch, though needed for calibration. It will be added soon)

Frederic:  some very preliminary "quenching curves" have been previously obtained (with my old "online" macro used during shifts at GSI), to check that everything works well. Now studying pedestals in more details, as well as LEX8 gain calibration (proton and muon data, G4 simulations from Thierry), cross-calibration and non-linearities.

Agnieszka & Eric:  first steps towards FRS calibration, focusing firstly on Z & A measurements by the MUSIC ionization chamber ; looking at a subset of data, studying stability in order to add corrections in the event builder code.

SLAC

Xin:  Update document LAT-TD-01588-01 which describes calibration tasks need to be performed for CAL during EM data taking. There are still some holes, I will send you a copy once it is done, we would like to have a conference call soon to discuss it.

Following Sasha's suggestion, I redid the light taper study with a large bin width on the muon peak histograms.  It did give a better result, although it is still difficult to fit the data close to edge of the crystal.