Evolutionary development of the space plasma laboratory

In connection with payload definition studies for the Shuttle, one particular study, initiated in 1971, was concerned with the Definition of a Plasma Physics and Environmental Perturbation Laboratory (PPEPL). Possibilities were explored for performing, from a manned Shuttle-borne laboratory, investigations utilizing the natural space plasma environment around the Shuttle, and investigations employing controlled active experiments within the space plasma environment. Special emphasis was placed on employing controlled active experiment techniques using a manned Shuttle for short duration (7 to 30 days) missions and frequent reflights.