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Related Experiment Videos

Shielding against galactic cosmic rays.

W Schimmerling1, J W Wilson, J E Nealy

  • 1University Space Research Association, Washington, DC 20024, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

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Galactic cosmic rays are modified, not stopped, by shielding. Shielding effectiveness for astronaut protection depends on material composition and thickness, impacting biological risk.

Area of Science:

  • Space physics
  • Radiation protection
  • Astrobiology

Background:

  • Galactic cosmic rays (GCRs) pose a significant radiation hazard to astronauts during space missions.
  • Current shielding materials do not attenuate GCRs but rather modify their composition and energy spectra.
  • Understanding GCR-ion interactions with shielding is crucial for developing effective protection strategies.

Purpose of the Study:

  • To analyze how shielding materials modify galactic cosmic rays.
  • To evaluate shielding effectiveness based on particle transport properties and biological endpoints.
  • To assess the impact of shield composition and thickness on astronaut radiation risk.

Main Methods:

  • Investigated the modification of GCRs by various shielding materials.
Keywords:
NASA Center HQSNASA Discipline Radiation Health

Related Experiment Videos

  • Analyzed particle transport properties and energy deposition within shields.
  • Examined the biological effectiveness using cell transformation assays (C3H10T1/2 mouse cells).

    • Main Results:

    • Shielding materials increase particle numbers and absorbed energy with thickness.
    • GCR composition modification is key to astronaut protection.
    • Shield effectiveness is strongly dependent on material composition and transport properties.

    Conclusions:

    • Shielding effectiveness is best understood by analyzing microscopic energy absorption events.
    • Biological endpoints, such as reduced cell transformation probability, provide a measure of shield performance.
    • New shielding technologies require evaluation based on biological effects to accurately estimate astronaut risk.