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Galactic cosmic ray abundances and spectra behind defined shielding.
W Heinrich1, E V Benton, B Wiegel
1Physics Department, University of Siegen, Germany.
Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|October 1, 1994
Summary
This study measured Linear Energy Transfer (LET) spectra from cosmic rays in space, comparing experimental data with models. While models generally agree, areas for improvement in predicting solar modulation and material shielding were identified.
Area of Science:
- Space physics
- Radiation shielding
- Astrophysics
Background:
- Understanding space radiation is crucial for astronaut safety and mission planning.
- Galactic Cosmic Rays (GCR) pose a significant radiation hazard in space.
- Accurate modeling of GCR flux is essential for predicting radiation doses.
Purpose of the Study:
- To measure Linear Energy Transfer (LET) spectra for lunar and near-Earth missions.
- To compare experimental LET spectra with model calculations.
- To identify limitations in current models for solar modulation and material shielding.
Main Methods:
- Measurements of LET spectra for lunar and near-Earth orbits (28-83 degrees inclination).
- Separation of GCR flux from detector interaction contributions.
- Comparison of experimental data with established GCR flux models.
Main Results:
- Experimental LET spectra generally agree with model calculations.
- Models accurately predict variations due to solar modulation, geomagnetic shielding, and material shielding.
- Discrepancies highlight areas needing refinement in modeling solar modulation and material shielding.
Conclusions:
- Current models provide a reasonable basis for calculating GCR fluxes and their variations.
- Further research is needed to improve the accuracy of models for solar modulation and material shielding effects.
- Detailed analysis reveals specific weaknesses in existing space radiation models.