Document Detail


Transport calculations and accelerator experiments needed for radiation risk assessment in space.
MedLine Citation:
PMID:  19205295     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The major uncertainties on space radiation risk estimates in humans are associated to the poor knowledge of the biological effects of low and high LET radiation, with a smaller contribution coming from the characterization of space radiation field and its primary interactions with the shielding and the human body. However, to decrease the uncertainties on the biological effects and increase the accuracy of the risk coefficients for charged particles radiation, the initial charged-particle spectra from the Galactic Cosmic Rays (GCRs) and the Solar Particle Events (SPEs), and the radiation transport through the shielding material of the space vehicle and the human body, must be better estimated Since it is practically impossible to measure all primary and secondary particles from all possible position-projectile-target-energy combinations needed for a correct risk assessment in space, accurate particle and heavy ion transport codes must be used. These codes are also needed when estimating the risk for radiation induced failures in advanced microelectronics, such as single-event effects, etc., and the efficiency of different shielding materials. It is therefore important that the models and transport codes will be carefully benchmarked and validated to make sure they fulfill preset accuracy criteria, e.g. to be able to predict particle fluence, dose and energy distributions within a certain accuracy. When validating the accuracy of the transport codes, both space and ground based accelerator experiments are needed The efficiency of passive shielding and protection of electronic devices should also be tested in accelerator experiments and compared to simulations using different transport codes. In this paper different multipurpose particle and heavy ion transport codes will be presented, different concepts of shielding and protection discussed, as well as future accelerator experiments needed for testing and validating codes and shielding materials.
Authors:
Lembit Sihver
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Zeitschrift für medizinische Physik     Volume:  18     ISSN:  0939-3889     ISO Abbreviation:  Z Med Phys     Publication Date:  2008  
Date Detail:
Created Date:  2009-02-11     Completed Date:  2009-03-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100886455     Medline TA:  Z Med Phys     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  253-64     Citation Subset:  IM    
Affiliation:
Nuclear Engineering, Applied Physics, Chalmers University of Technology, Gothenburg, Sweden. sihver@chalmers.se
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MeSH Terms
Descriptor/Qualifier:
Cosmic Radiation / adverse effects*
Earth (Planet)
Heavy Ions / adverse effects
Humans
Particle Accelerators
Phantoms, Imaging
Radiation Protection / instrumentation
Risk Assessment
Space Flight* / instrumentation
United States
United States National Aeronautics and Space Administration / standards

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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