Method of making foam-encapsulated laser targets
- Livermore, CA
Foam-encapsulated laser fusion targets are fabricated by suspending fusion fuel filled shells in a solution of cellulose acetate, extruding the suspension through a small orifice into a bath of ice water, soaking the thus formed shell containing cellulose acetate gel in the water to extract impurities, freezing the gel, and thereafter freeze-drying wherein water and solvents sublime and the gel structure solidifies into a low-density microcellular foam containing one or more encapsulated fuel-filled shells. The thus formed material is thereafter cut and mounted on a support to provide laser fusion targets containing a fuel-filled shell surrounded by foam having a thickness of 10 to 60 .mu.m, a cell size of less than 2 .mu.m, and density of 0.08 to 0.6.times.10.sup.3 kg/m.sup.3. Various configured foam-encapsulated targets capable of being made by the encapsulation method are illustrated.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- United States of America as represented by United States Energy (Washington, DC)
- Patent Number(s):
- US 4021280
- OSTI ID:
- 862826
- Country of Publication:
- United States
- Language:
- English
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Method for foam encapsulating laser targets
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08
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60
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bath
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cellulose
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configured
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cut
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encapsulated
encapsulated fuel
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extract
extruding
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foam-encapsulated
foam-encapsulated laser
formed
freeze-drying
freezing
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fusion target
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ice
ice water
illustrated
impurities
kg
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laser target
laser targets
low-density
low-density microcellular
material
method
microcellular
microcellular foam
mounted
orifice
provide
shell
shell containing
shells
size
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solvents
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structure solidifies
sublime
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