University of Tasmania
Browse

File(s) under permanent embargo

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

journal contribution
posted on 2023-05-17, 20:06 authored by Al Anid, H, Lewis, BJ, Bennett, LGI, Takada, M, Marcus DuldigMarcus Duldig
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.

History

Publication title

Radiation Protection Dosimetry

Volume

158

Pagination

355-367

ISSN

0144-8420

Department/School

School of Natural Sciences

Publisher

Nuclear Technology Publ

Place of publication

Po Box 7, Ashford, England, Kent, Tn23 1Yw

Rights statement

Copyright 2013 Oxford University Press

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC