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Title: Cryogenic-laser-fusion target implosion studies performed with the OMEGA uv-laser system

Abstract

A series of direct-drive laser-fusion implosion experiments was performed on cryogenically cooled, DT-filled glass microballoons with the OMEGA 24-beam uv (351-nm) laser system. The targets consisted of glass microballoons having radii of 100 to 150 {mu}m, wall thicknesses of 3 to 7 {mu}m, filled with DT gas at pressures of 75 to 100 atm. The targets were cooled to below the freezing point of DT, {ital in} {ital situ}, by a cryogenic target system. The targets were irradiated by approximately 1 to 1.2 kJ of uv light in 650-ps Gaussian pulses. The on-target irradiation uniformity was enhanced for these experiments by the use of distributed phase plates, which brought the estimated irradiation nonuniformities to {similar to}12% ({sigma}{sub rms}). Target performance was diagnosed by an array of x-ray, plasma, and nuclear instruments. The measured target performance showed {similar to}70% absorption, thermonuclear yields of 10{sup 6} to 10{sup 8} neutrons, and final fuel areal densities of 20 to 40 mg/cm{sup 2} for the optimum targets examined in these experiments. Fuel densities at the time of thermonuclear neutron production, inferred from direct measurements of the fuel areal density, were in the range of 20 to 50 g/cm{sup 3} (100 to 200 times themore » density of liquid DT) for the optimum targets.« less

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
OSTI Identifier:
5588096
Resource Type:
Journal Article
Journal Name:
Physical Review (Section) A: General Physics; (USA)
Additional Journal Information:
Journal Volume: 40:5; Journal ID: ISSN 0556-2791
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER TARGETS; LASER IMPLOSIONS; ADIABATIC COMPRESSION HEATING; CRYOGENICS; DENSITY; DEUTERIUM TRITIDE; FUSION YIELD; OMEGA FACILITY; THERMONUCLEAR FUELS; ULTRALOW TEMPERATURE; ULTRAVIOLET RADIATION; ELECTROMAGNETIC RADIATION; FUELS; HEATING; HYDROGEN COMPOUNDS; IMPLOSIONS; NUCLEAR REACTION YIELD; PHYSICAL PROPERTIES; PLASMA HEATING; RADIATIONS; TARGETS; TRITIDES; TRITIUM COMPOUNDS; YIELDS; 700208* - Fusion Power Plant Technology- Inertial Confinement Technology

Citation Formats

Marshall, F J, Letzring, S A, Verdon, C P, Skupsky, S, Keck, R L, Knauer, J P, Kremens, R L, Bradley, D K, Kessler, T, Delettrez, J, and others, and. Cryogenic-laser-fusion target implosion studies performed with the OMEGA uv-laser system. United States: N. p., 1989. Web. doi:10.1103/PhysRevA.40.2547.
Marshall, F J, Letzring, S A, Verdon, C P, Skupsky, S, Keck, R L, Knauer, J P, Kremens, R L, Bradley, D K, Kessler, T, Delettrez, J, & others, and. Cryogenic-laser-fusion target implosion studies performed with the OMEGA uv-laser system. United States. doi:10.1103/PhysRevA.40.2547.
Marshall, F J, Letzring, S A, Verdon, C P, Skupsky, S, Keck, R L, Knauer, J P, Kremens, R L, Bradley, D K, Kessler, T, Delettrez, J, and others, and. Fri . "Cryogenic-laser-fusion target implosion studies performed with the OMEGA uv-laser system". United States. doi:10.1103/PhysRevA.40.2547.
@article{osti_5588096,
title = {Cryogenic-laser-fusion target implosion studies performed with the OMEGA uv-laser system},
author = {Marshall, F J and Letzring, S A and Verdon, C P and Skupsky, S and Keck, R L and Knauer, J P and Kremens, R L and Bradley, D K and Kessler, T and Delettrez, J and others, and},
abstractNote = {A series of direct-drive laser-fusion implosion experiments was performed on cryogenically cooled, DT-filled glass microballoons with the OMEGA 24-beam uv (351-nm) laser system. The targets consisted of glass microballoons having radii of 100 to 150 {mu}m, wall thicknesses of 3 to 7 {mu}m, filled with DT gas at pressures of 75 to 100 atm. The targets were cooled to below the freezing point of DT, {ital in} {ital situ}, by a cryogenic target system. The targets were irradiated by approximately 1 to 1.2 kJ of uv light in 650-ps Gaussian pulses. The on-target irradiation uniformity was enhanced for these experiments by the use of distributed phase plates, which brought the estimated irradiation nonuniformities to {similar to}12% ({sigma}{sub rms}). Target performance was diagnosed by an array of x-ray, plasma, and nuclear instruments. The measured target performance showed {similar to}70% absorption, thermonuclear yields of 10{sup 6} to 10{sup 8} neutrons, and final fuel areal densities of 20 to 40 mg/cm{sup 2} for the optimum targets examined in these experiments. Fuel densities at the time of thermonuclear neutron production, inferred from direct measurements of the fuel areal density, were in the range of 20 to 50 g/cm{sup 3} (100 to 200 times the density of liquid DT) for the optimum targets.},
doi = {10.1103/PhysRevA.40.2547},
journal = {Physical Review (Section) A: General Physics; (USA)},
issn = {0556-2791},
number = ,
volume = 40:5,
place = {United States},
year = {1989},
month = {9}
}