Plasma radiation shield - Concept and applications to space vehicles.

The plasma radiation shield is an active device using free electrons, electric and magnetic fields for the purpose of shielding astronauts from energetic solar flare-produced protons. The concept of plasma radiation shielding is reviewed in the light of current studies. The available evidence indicates that the concept is physically sound, but important practical questions remain in at least two areas; these have to do with establishment and control of the extremely high voltages required, and with integration of the concept into a realistic space vehicle design. Other aspects of the plasma radiation shield discussed include selection of the shielding voltage, vehicle configuration possibilities, some aspects of the superconducting coil system, and the vehicle power supply. The effects of the plasma radiation shield on the communications, attitude control, propulsion, and life-support systems of the space vehicle are also considered.