Plastic and nonmetallic article shaping or treating: processes – Spheroidizing or rounding of solid particles
Patent
1977-10-11
1980-09-23
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Spheroidizing or rounding of solid particles
176 1, 176 67, 2041592, 264 22, 264 41, 264DIG13, 521 64, B29C 2300, B29D 2700
Patent
active
042242614
ABSTRACT:
Targets for high energy beams, such as laser beams, produced in laser fusion apparatus are described. The targets are porous spheres of deuterated hydrocarbon material, particularly deuterated polyethylene. The spheres are small and have diameters in the range of 50 to 300 microns. Higher neutron yields are obtained from these targets than from solid targets of similar materials, (viz., spherical targets of much higher density). Methods of fabricating the targets by forming them into solid spheres, cross linking their molecules and causing them to swell such that the resultant targets have a microscopically small sponge-like structure, are also described. These micro-sponge targets may be treated by being exposed to tritium gas so as to undergo tritium deuterium exchange which is of enhanced efficiency by virtue of their porous, sponge-like structure. The porous sponge-like targets of deuterated, tritiated material may be stored under liquid to enhance their stability by absorption of their own beta radiation.
REFERENCES:
patent: 4092381 (1978-05-01), Halpern et al.
Wilzbach, Kenneth B., "Tritium-Labeling by Exposure of Organic Compounds to Tritium Gas," in American Chemical Society Journal, vol. 79, Feb. 20, 1957, p. 1013.
Friedman, W. D., G. M. Halpern and B. A. Brinker, "Target Fabrication and Positioning Techniques for Laser Fusion Experiments,"in Rev. Sci. Instrum., vol. 45, No. 10, Oct. 1974, pp. 1245-1252.
McNally, J. Rand and R. D. Sharp, "Advanced Fuels for Inertial Confinement," in Nuclear Fusion, vol. 16, No. 5, Nov. 1976, pp. 868-870.
Anderson Philip
Lukacher Martin
The University of Rochester
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