Parabolic lithium mirror for a laser-driven hot plasma producing

Details Parabolic lithium mirror for a laser-driven hot plasma producing Parabolic lithium mirror for a laser-driven hot plasma producing

1976-06-14

1979-06-19

Behrend, Harvey E.

G21B 100

Patent

active

041585984

ABSTRACT:
A hot plasma producing device is provided, wherein pellets, singly injected, of frozen fuel are each ignited with a plurality of pulsed laser beams. Ignition takes place within a void area in liquid lithium contained within a pressure vessel. The void in the liquid lithium is created by rotating the pressure vessel such that the free liquid surface of molten lithium therein forms a paraboloid of revolution. The paraboloid functions as a laser mirror with a reflectivity greater than 90%. A hot plasma is produced when each of the frozen deuterium-tritium pellets sequentially arrive at the paraboloid focus, at which time each pellet is illuminated by the plurality of pulsed lasers whose rays pass through circular annuli across the top of the paraboloid. The beams from the lasers are respectively directed by associated mirrors, or by means of a single conical mirror in another embodiment, and by the mirror-like paraboloid formed by the rotating liquid lithium onto the fuel pellet such that the optical flux reaching the pellet can be made to be uniform over 96% of the pellet surface area. The very hot plasma produced by the action of the lasers on the respective singly injected fuel pellets in turn produces a copious quantity of neutrons and X-rays such that the device has utility as a neutron source or as an x-ray source. In addition, the neutrons produced in the device may be utilized to produce tritium in a lithium blanket and is thus a mechanism for producing tritium.

REFERENCES:
patent: 3624239 (1971-11-01), Fraas
Technology Review, 12/76, pp. 20-24, 32-34, 39, 41-43.
Matt-1050, 8/74, pp. 526-529.
ERDA-28, 1/31/75, pp. 1-13.
Nuclear News, May 1975, pp. 79, 80.

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