1. A.Chekhtman1 GLAST LAT ProjectInstrument Analysis meeting, January, 20, 2006 Status of calorimeter calibration. Alexandre Chekhtman NRL/GMU Gamma-ray Large Area Space Telescope

2. A.Chekhtman2 GLAST LAT ProjectInstrument Analysis meeting, January, 20, 2006 Tresholds calibration calibDAC (run 135005271) –pedestals, relgain, fle2adc, fhe2adc, lac2adc, uld2adc muTrg (runs 135005296, 135005297, 135005298) –Bias between FLE/FHE thresholds for charge injection and muons Additional input – adc2nrg tables –We used data from 8-towers configuration + preship data for recently added towers. Output: –Xml files for FLE, FHE, LAC and ULD for all required configuration Difficulties: –Bug in the algorithm for smoothing sparsed characterisation tables caused some LAC and FHE to be too low producing high trigger rate and occupancy – has been fixed –For some channels required FLE thershold could not be set – the algorithm incorrectly returned FLEDAC=7f in this case Fixed

3. A.Chekhtman3 GLAST LAT ProjectInstrument Analysis meeting, January, 20, 2006 Energy scale calibration Inputs: –calibGen (runs 135005279 and 135005280) Nonlinearity calibration –B13 (run 135005337) Pedestals –B30, runs 135005404 – 135005524, excluding 135005406(file missing) and 135005494 (bad) 26 M events Separate batch job for each tower –CPU time ~3 hours per tower –All towers processed in parallel Outputs: ci_intnonlin.digitization-v3r4p4_135005279_digi_DIGI.xml mc_peds.digitization-v3r4p4_135005337_digi_DIGI.xml mc_asym.digitization-v3r4p4_135005404_digi_DIGI.xml mc_mpd.digitization-v3r4p4_135005404_digi_DIGI.xml