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CARI-7A: DEVELOPMENT AND VALIDATION.

Kyle Copeland1

  • 1U.S. Federal Aviation Administration, Civil Aerospace Medical Institute, Protection and Survival Research Laboratory, AAM-631, 6500S. MacArthur Blvd, Oklahoma City, OK73169, USA.

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Summary
This summary is machine-generated.

Aircrew face higher radiation doses from galactic cosmic rays (GCR), including heavy ions. The new CARI-7A software improves GCR dose calculations for air travel safety.

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Area of Science:

  • Aviation safety
  • Radiation physics
  • Astrobiology

Background:

  • Aircrew receive higher annual radiation doses than the general population.
  • Galactic cosmic radiation (GCR), including heavy ions, is the primary source of this exposure.
  • Heavy ions pose a significant radiation risk at high altitudes due to their high weighting factors.

Purpose of the Study:

  • To introduce the CARI-7A software for calculating GCR flight doses.
  • To enhance GCR dose calculations by incorporating direct heavy ion transport.
  • To enable accurate dose estimations for aircrew up to the edge of space.

Main Methods:

  • Utilizing a database of atmospheric particle spectra from GCR ions.
  • Pre-calculating spectra using MCNPX 2.7.0.
  • Implementing direct heavy ion transport in CARI-7A, unlike its predecessor CARI-6.

Main Results:

  • CARI-7A enables GCR dose calculations to the edge of space.
  • The software's results were compared with real-world measurements.
  • Comparisons were made with commercial aircraft, high-altitude research aircraft, and other calculation methods.

Conclusions:

  • CARI-7A represents a significant advancement in GCR flight dose calculation software.
  • The inclusion of heavy ion transport improves the accuracy of radiation dose assessments for aircrew.
  • The updated software aids in ensuring aircrew safety in high-radiation environments.