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Related Experiment Videos

Interplanetary crew exposure estimates for galactic cosmic rays.

L W Townsend1, F A Cucinotta, J W Wilson

  • 1Space Systems Division, NASA Langley Research Center, Hampton, Virginia 23665-5225.

Radiation Research
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Astronauts face galactic cosmic ray exposure during solar minimum. Aluminum shielding reduces this, but the equivalent sphere approximation overestimates actual organ doses.

Area of Science:

  • Space science
  • Radiation physics
  • Astrobiology

Background:

  • Interplanetary space is filled with galactic cosmic rays (GCRs).
  • Astronauts on long-duration missions require protection from GCRs.
  • Understanding GCR exposure is crucial for astronaut health and mission planning.

Purpose of the Study:

  • To estimate astronaut exposure to GCRs during solar minimum.
  • To evaluate the effectiveness of aluminum shielding for spacecraft.
  • To assess absorbed dose and dose equivalent for critical organs.

Main Methods:

  • Utilized Langley Research Center's GCR transport code.
  • Employed the Computerized Anatomical Man model for realistic human geometry.
  • Analyzed contributions from primary ions, fragmentation products, and target fragments.
Keywords:
NASA Center LaRCNASA Discipline Radiation Health

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Main Results:

  • Calculated initial estimates of interplanetary GCR exposure for astronauts.
  • Assessed dose to skin, ocular lens, and bone marrow.
  • Found that the equivalent sphere approximation overestimates organ exposures.

Conclusions:

  • Aluminum shielding is effective in mitigating GCR exposure.
  • The equivalent sphere approximation provides conservative dose estimates.
  • Accurate dose assessment is vital for safeguarding astronaut health in deep space.