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Model analysis of Space Shuttle dosimetry data.

J R Letaw1, R Silberberg, C H Tsao

  • 1Severn Communications Corporation, Millersville, MD 21108, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1989
PubMed
Summary
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High-energy particles, including cosmic radiation and target secondaries, were analyzed using plastic track detectors on Space Shuttle missions. Target secondaries significantly contribute to the measured linear energy transfer spectra, especially in shielded environments.

Area of Science:

  • Space physics and radiation protection.
  • Particle detection and analysis.
  • Astroparticle physics.

Background:

  • Space Shuttle missions provide unique environments for studying high-energy particle radiation.
  • Plastic track detectors are effective tools for measuring particle tracks and energy deposition.
  • Understanding radiation environments is crucial for astronaut safety and spacecraft design.

Purpose of the Study:

  • To conduct an extensive model analysis of plastic track detector measurements for high-Linear Energy Transfer (LET) particles.
  • To investigate the contributions of different radiation sources to the measured LET spectra on three specific Space Shuttle flights.
  • To assess the significance of target secondary particles in various shielding conditions.

Main Methods:

Related Experiment Videos

  • Utilized plastic track detector data from Space Shuttle flights STS-51F, STS-51J, and STS-61C.
  • Developed and applied a comprehensive model incorporating trapped protons, galactic cosmic radiation, and target secondary particles.
  • Analyzed the contributions of each radiation component to the overall LET spectra.

    • Main Results:

    • Galactic cosmic radiation and trapped protons were modeled.
    • Target secondary particles were identified as a significant component of the measured LET spectra.
    • The importance of target secondaries was particularly noted in thickly shielded space environments.

    Conclusions:

    • The study highlights the critical role of target secondary particles in space radiation environments.
    • Accurate modeling of space radiation requires the inclusion of target secondaries, especially for shielded areas.
    • Findings contribute to a better understanding of radiation hazards in space for future missions.