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10:33
Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification (ADCI) and Dose Estimation
Published on: September 4, 2017
Updated measurements from CREAM & CREDO & implications for environment & shielding models.
C S Dyer1, P R Truscott, C L Peerless
1Space Department, DERA Farnborough, England.
IEEE Transactions on Nuclear Science
|September 7, 2001
Summary
Cosmic ray data from 1990-1997 reveal a threefold increase in radiation at high latitudes and a westward drift in the South Atlantic Anomaly. Improved models show convergence with observations, but secondary particle treatment needs enhancement.
Area of Science:
- Space physics
- Radiation science
- Astrophysics
Background:
- Spacecraft missions like UoSat-3, Space Shuttle, STRV-1a, and APEX have collected crucial cosmic ray data since 1990.
- Understanding space radiation is vital for protecting astronauts and sensitive electronics during space missions.
Purpose of the Study:
- To analyze cosmic ray modulation and the South Atlantic Anomaly's evolution using extended flight data.
- To compare observed particle fluxes and energy transfer spectra with advanced radiation transport models.
Main Methods:
- Integrated flight data from Cosmic Radiation Environment Monitors (CREAM & CREDO) spanning 1990-1997.
- Employed improved environment and radiation transport calculations, including shield distributions and secondary particle generation.
- Analyzed particle fluxes and linear energy transfer spectra.
Main Results:
- Observed a threefold increase in cosmic ray intensity at high latitudes.
- Documented a general increase and westward drift in the South Atlantic Anomaly.
- Found encouraging convergence between model predictions and observational data.
Conclusions:
- Current models show good agreement with observed cosmic ray data, particularly regarding modulation and the South Atlantic Anomaly.
- Further refinement of radiation transport models is necessary, especially for accurately accounting for locally produced secondary particles.
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