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Aircrew radiation dose estimates during recent solar particle events and the effect of particle anisotropy

Citation

Al Anid, H and Lewis, BJ and Bennett, LGI and Takada, M and Duldig, ML, Aircrew radiation dose estimates during recent solar particle events and the effect of particle anisotropy, Radiation Protection Dosimetry, 158, (3) pp. 355-367. ISSN 0144-8420 (2014) [Refereed Article]

Copyright Statement

Copyright 2013 Oxford University Press

DOI: doi:10.1093/rpd/nct234

Abstract

A model was developed using a Monte-Carlo radiation transport code, MCNPX, to estimate the additional radiation exposure to aircrew members during solar particle events. The model transports an extrapolated particle spectrum based on satellite measurements through the atmosphere to aircraft altitudes. This code produces the estimated flux at a specific altitude where radiation dose conversion coefficients are applied to convert the particle flux into effective and ambient dose-equivalent rates. A cut-off rigidity model accounts for the shielding effects of the Earth's magnetic field. Comparisons were made between the model predictions and actual flight measurements taken with various types of instruments used to measure the mixed radiation field during ground level enhancements (GLEs) 60 and 65. An anisotropy analysis that uses neutron monitor responses and the pitch angle distribution of energetic solar particles was used to identify particle anisotropy for a solar event in December 2006. In anticipation of future commercial use, a computer code has been developed to implement the radiation dose assessment model for routine analysis.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Other Physical Sciences
Research Field:Physical Sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Duldig, ML (Dr Marc Duldig)
ID Code:87022
Year Published:2014 (online first 2013)
Web of Science® Times Cited:3
Deposited By:Mathematics and Physics
Deposited On:2013-11-06
Last Modified:2017-11-03
Downloads:0

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