ANALOG STUDIES OF ACTIVE RADIATION SHIELDING.
Final rept. May 66-1 May 67,
NORTHROP SPACE LABS HAWTHORNE CA
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Active radiation shielding utilizes high magnetic fields produced by superconducting coils to deflect or repel charged particle space radiations. This effort undertook the study of partially forbidden regions of various active radiation shields in order to further decrease shielding weight. The magnetic shield simulator MAGSIM was modified to investigate partially forbidden regions corresponding to anisotropic incident radiation sources and then used to investigate the effectiveness of solenoid and single coil magnets for protecting manned spacecraft from Van Allen belt radiation. Solar flare radiation and an intense artificial electron radiation environment were also considered in this study. When a 60 degree loss cone incident radiation source, indigenous to trapped radiation at the lower altitudes, was simulated in the magnetic shield simulator, the single coil magnet produced a relatively large protective region at its center. These data were used to determine the mass of a superconductor coil that would shield a spherically shaped vehicle from several different trapped radiation environments and the resulting masses compared with a material shield that would provide the same protection. Other active type shields were investigated however, the mass of the single coil shield was much less than other shields, active or passive. The effect of large magnetic fields on spacecraft equipment was investigated and analytical solutions to this problem are presented with practical examples. Author
- Nuclear Radiation Shielding, Protection and Safety