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Issues in deep space radiation protection.

J W Wilson1, J L Shinn, R K Tripathi

  • 1NASA Langley Research Center, Hampton, VA, USA.

Acta Astronautica
|October 24, 2001
PubMed
Summary
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Deep space radiation, primarily Galactic Cosmic Rays (GCR), poses unknown biological risks. Current shielding methods may be inadequate, suggesting novel materials like carbon nanofibers for improved spacecraft radiation protection.

Area of Science:

  • Space science and astrobiology
  • Radiation protection
  • Materials science

Background:

  • Deep space missions expose astronauts to Galactic Cosmic Rays (GCR), with limited biological data available.
  • Traditional radiation protection metrics based on linear energy transfer (LET) may be insufficient for GCR ions.
  • Current aluminum alloy spacecraft structures might create hazardous internal radiation environments.

Purpose of the Study:

  • To evaluate the effectiveness of current radiation protection strategies against GCR.
  • To explore alternative materials for optimizing spacecraft shielding.
  • To assess the potential of hydrogenated carbon nanofibers as a radiation shielding material.

Main Methods:

  • Review of existing biological data on GCR exposure.
Keywords:
NASA Center HQSNASA Center JSCNASA Center LaRCNASA Discipline Radiation HealthNon-NASA Center

Related Experiment Videos

  • Analysis of spacecraft structural materials and their radiation shielding properties.
  • Discussion of methods for optimizing shielding effectiveness through material selection.

    • Main Results:

    • Evidence suggests conventional quality factors may not adequately protect against GCR.
    • Aluminum alloys in typical space application thicknesses may pose radiation risks.
    • Hydrogenated carbon nanofibers show promise as a superior radiation protection material.

    Conclusions:

    • Rethinking radiation protection strategies for deep space is crucial.
    • Material selection plays a vital role in mitigating GCR exposure.
    • Hydrogenated carbon nanofibers warrant further investigation for spacecraft shielding applications.