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Reconstruction Tools

Workshop on the development of tools for reconstructing beamtest data from the Gamma-ray Large Area Space Telescope (GLAST). The workshop, held on March 21, 2006, discussed existing tools and future developments, focusing on processing of simulated events, data input, and ntuple generation.

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Reconstruction Tools

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  1. Gamma-ray Large Area Space Telescope Beamtest Reconstruction Tools Reconstruction Tools Leon Rochester Pisa CU Workshop 21-March-2006 Leon Rochester, SLACPisa Beamtest Workshop21 March, 2006

  2. What Exists Now • Standard Gleam knows about the CU • toy geometry • multiple incident particles • Checkout package about to appear • will guarantee a consistent test of packages • place to collect macros, etc.

  3. Event from PS Simulation

  4. Event from SPS Simulation

  5. What doesn’t exist yet • ACD analysis • Processing of ancillary data • Will Gleam do this? • Output of truncation info • TBD

  6. GLEAM as Event Monitor Do minimal processing: • Data input • Files • Simultaneous sampling from multi-caster? • Conversion to digis • Clustering in Trackers and Calorimeters • Truncation Analysis • TBD

  7. PS simulation – Monitor Mode

  8. SPS simulation – Monitor Mode

  9. Oops!

  10. Maybe not such a good idea!

  11. Same event truncated at 14 hits

  12. Truncation Info for this event

  13. Gleam as an quick ntuple generator • Run on EBF files to process entire runs • Digitize • Minimal Recon: cluster, truncation, TBD • TBD ntuple generation (no track info) • Rates (just clustering so far): • 3-GeV photons, “full” trigger – 500 evt/sec • 250-GeV electrons – 50 evt/sec • 1 15-second period ~ 2 cpu seconds

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