Evaluation of Magnetic Shielding of Interplanetary Spacecraft from Cosmic Radiation

Details Evaluation of Magnetic Shielding of Interplanetary Spacecraft from Cosmic Radiation Evaluation of Magnetic Shielding of Interplanetary Spacecraft from Cosmic Radiation

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3481s&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

The continuous exposure to cosmic radiation is a possible constraint on long duration (multi year) manned interplanetary missions. The magnetic shielding concept is often considered as a possible method to reduce the radiation dose from the cosmic radiation. We have evaluated possible magnetic field configurations to determine what is required to reduce, by one-half, the cosmic ray flux impacting a spacecraft. This evaluation has been accomplished by tracing cosmic ray trajectories through different magnetic field configurations. We find that the magnetic field gradient is the primary factor that controls the magnetic shielding effectiveness. A pseudo dip ole configuration (1/r3 ) magnetic field gradient requires unreasonably large magnetic fields. A (1/r2 ) magnetic field gradient is capable of much better magnetic shielding. A (1/r) magnetic field gradient would be best for magnetic shielding. We have evaluated possible mini-magnetosphere configurations to determine the magnetic shielding that might be attainable. The mini-magnetosphere configurations evaluated are consistent with a (1/r2 ) magnetic field gradient.

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