The GLAST Background Model
- University of Denver (United States)
- University of California at Santa Cruz (United States)
- University of Washington (United States)
- Naval Research Laboratory (United States)
- Instituto Nazionale di Fisica Nucleare (INFN)-Pisa (Italy)
- NASA Goddard Space Flight Center (United States)
- Hiroshima University (Japan)
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.
- OSTI ID:
- 21067314
- Journal Information:
- AIP Conference Proceedings, Vol. 921, Issue 1; Conference: 1. GLAST symposium, Stanford, CA (United States), 5-8 Feb 2007; Other Information: DOI: 10.1063/1.2757451; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA). Collaboration: GLAST Mission Team; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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