Terry Kammash, Stephen S. Attwood, Professor
of Nuclear Engineering and Radiological Sciences
University of Michigan
"Advanced Propulsion Systems for Human
Space Exploration"
Abstract:
Human exploration of the solar system and beyond
requires a propulsion system with capabilities that far exceed those
provided by present-day chemical systems. Rapid transit times are
almost imperative in order to minimize exposure to intense galactic
radiation,and to prevent severe physical degradation of the crew.
Because of the high cost of putting objects in space we focus our
attention on potential
sources that yield large amounts of energy per unit mass.These include
nuclear systems that utilize fission,fusion,and antimatter annihilation
reactions. We examine several concepts belonging to these categories
and evaluate their development in terms of the two important propulsion
parameters, namely thrust and specific impulse. We find that several
schemes,currently under consideration,have the potential of meeting
these stringent requirements and can still be developed in the next
few decades
as specified by NASA.