skip to main content

Title: Modeling radiation loads to detectors in a SNAP mission

In order to investigate degradation of optical detectors of the Supernova Acceleration Project (SNAP) space mission due to irradiation, a three-dimensional model of the satellite has been developed. Realistic radiation environment at the satellite orbit, including both galactic and trapped in radiation belts cosmic rays, has been taken into account. The modeling has been performed with the MARS14 Monte Carlo code. In a current design, the main contribution to dose accumulated in the photodetectors is shown to be due to trapped protons. A contribution of primary {alpha}-particles is estimated. Predicted performance degradation for the photo-detector for a 4-year space mission is 40% and can be reduced further by means of shielding optimization.
Authors:
Publication Date:
OSTI Identifier:
823659
Report Number(s):
FERMILAB-Conf-04/055-AD
TRN: US0401795
DOE Contract Number:
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: 10th International Conference on Radiation Shielding (ICRS-10), Funchal, Madeira (PT), 05/09/2004--05/10/2004; Other Information: PBD: 12 May 2004
Research Org:
Fermi National Accelerator Lab., Batavia, IL (US)
Sponsoring Org:
USDOE Office of Energy Research (ER) (US)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; DESIGN; IRRADIATION; OPTIMIZATION; PERFORMANCE; PHOTODETECTORS; RADIATION BELTS; RADIATIONS; SATELLITES; SHIELDING; SIMULATION; TRAPPED PROTONS