The GLAST Background Model

Details The GLAST Background Model The GLAST Background Model

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..921..560o&link_type=abstract

THE FIRST GLAST SYMPOSIUM. AIP Conference Proceedings, Volume 921, pp. 560-561 (2007).

Computer Science

X- And Gamma-Ray Telescopes And Instrumentation, Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays

Scientific paper

In order to estimate the ability of the GLAST/LAT to reject unwanted background of charged particles, optimize the on-board processing, size the required telemetry and optimize the GLAST orbit, we developed a detailed model of the background particles that would affect the LAT. In addition to the well-known components of the cosmic radiation, we included splash and reentrant components of protons, electrons (e+ and e-) from 10 MeV and beyond as well as the albedo gamma rays produced by cosmic ray interactions with the atmosphere. We made estimates of the irreducible background components produced by positrons and hadrons interacting in the multilayered micrometeorite shield and spacecraft surrounding the LAT and note that because the orbital debris has increased, the shielding required and hence the background are larger than were present in EGRET. Improvements to the model are currently being made to include the east-west effect.

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