A laser driven fusion plasma for space propulsion

Details A laser driven fusion plasma for space propulsion A laser driven fusion plasma for space propulsion

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pdl..confr....k&link_type=abstract

AIAA, Plasmadynamics and Lasers Conference, 23rd, Nashville, TN, July 6-8, 1992. 4 p.

Computer Science

Performance

Inertial Confinement Fusion, Laser Fusion, Nuclear Propulsion, Plasma Propulsion, Propulsion System Performance, Hydrogen Isotopes, Laser Ablation, Manned Mars Missions

Scientific paper

The present inertial-confinement fusion concept employs a magnetized target pellet that is driven by a laser beam in conjunction with a tungsten shell whose inner surface is coated with a deuterium-tritium fusion fuel mixture. A laser beam that enters the pellet through a hole simultaneously creates a fusion-grade plasma and gives rise to a powerful, instantaneous magnetic field which thermally insulates the plasma from the material wall. The plasma lifetime of this self-generated magnetic field scheme is dictated by the shock speed in the tungsten shell rather than by the speed of sound in the plasma: it consequently burns much longer and efficiently than plausible alternatives. A manned mission could by these means be completed in a few months rather than a few years, in virtue of the great specific impulse achieved.

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