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Title: The GLAST Background Model

Abstract

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.

Authors:
 [1];  [2];  [3];  [4];  [5]; ;  [6];  [7]
  1. University of Denver (United States)
  2. University of California at Santa Cruz (United States)
  3. University of Washington (United States)
  4. Naval Research Laboratory (United States)
  5. Instituto Nazionale di Fisica Nucleare (INFN)-Pisa (Italy)
  6. NASA Goddard Space Flight Center (United States)
  7. Hiroshima University (Japan)
Publication Date:
OSTI Identifier:
21067314
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 921; Journal 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; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COSMIC ELECTRONS; COSMIC PHOTONS; COSMIC POSITRONS; COSMIC PROTONS; COSMIC RAY DETECTION; GAMMA DETECTION; GAMMA RADIATION; MEV RANGE; PARTICLE INTERACTIONS; PHOTON EMISSION; SHIELDING; TELEMETRY; TELESCOPE COUNTERS

Citation Formats

Ormes, J F, Atwood, W, Burnett, T, Grove, E, Longo, F, McEnery, J, Ritz, S, and Mizuno, T. The GLAST Background Model. United States: N. p., 2007. Web. doi:10.1063/1.2757451.
Ormes, J F, Atwood, W, Burnett, T, Grove, E, Longo, F, McEnery, J, Ritz, S, & Mizuno, T. The GLAST Background Model. United States. https://doi.org/10.1063/1.2757451
Ormes, J F, Atwood, W, Burnett, T, Grove, E, Longo, F, McEnery, J, Ritz, S, and Mizuno, T. 2007. "The GLAST Background Model". United States. https://doi.org/10.1063/1.2757451.
@article{osti_21067314,
title = {The GLAST Background Model},
author = {Ormes, J F and Atwood, W and Burnett, T and Grove, E and Longo, F and McEnery, J and Ritz, S and Mizuno, T},
abstractNote = {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.},
doi = {10.1063/1.2757451},
url = {https://www.osti.gov/biblio/21067314}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 921,
place = {United States},
year = {Thu Jul 12 00:00:00 EDT 2007},
month = {Thu Jul 12 00:00:00 EDT 2007}
}