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Title: Method of making foam-encapsulated laser targets

Abstract

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.

Inventors:
 [1];  [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
862826
Patent Number(s):
4021280
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; foam-encapsulated; laser; targets; fusion; fabricated; suspending; fuel; filled; shells; solution; cellulose; acetate; extruding; suspension; orifice; bath; ice; water; soaking; formed; shell; containing; extract; impurities; freezing; thereafter; freeze-drying; solvents; sublime; structure; solidifies; low-density; microcellular; foam; encapsulated; fuel-filled; material; cut; mounted; support; provide; surrounded; thickness; 10; 60; cell; size; density; 08; times; kg; various; configured; capable; encapsulation; illustrated; low-density microcellular; density microcellular; fusion targets; cell size; laser fusion; cellulose acetate; laser targets; microcellular foam; fusion target; shell containing; solvents sublime; structure solidifies; fusion fuel; laser target; foam containing; foam-encapsulated laser; ice water; encapsulation method; encapsulated fuel; cellular foam; /156/264/376/

Citation Formats

Rinde, James A, and Fulton, Fred J. Method of making foam-encapsulated laser targets. United States: N. p., 1977. Web.
Rinde, James A, & Fulton, Fred J. Method of making foam-encapsulated laser targets. United States.
Rinde, James A, and Fulton, Fred J. Sat . "Method of making foam-encapsulated laser targets". United States. https://www.osti.gov/servlets/purl/862826.
@article{osti_862826,
title = {Method of making foam-encapsulated laser targets},
author = {Rinde, James A and Fulton, Fred J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {1}
}

Patent:

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