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Title: Effects of radiation on direct-drive laser fusion targets

Abstract

The role played by radiation in the radiation-preheated direct-drive laser fusion target design is discussed. The soft x-rays emitted during the foot of the laser pulse--at a few 10{sup 12} W/cm{sup 2}--preheat the low-opacity foam ablator which helps to control the Rayleigh-Taylor instability. The foam opacity is, however, thick enough to stop that radiation, keeping the fuel on a low adiabat. Radiation effects are also important in the blow-off corona of the target because they establish a long scale-length plasma. This may help to shield the ablation region from the nonuniformities in the laser absorption. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [4];  [1];  [1];  [1]
  1. Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)
  2. ARTEP Inc., Columbia, Maryland 20145 (United States)
  3. Laboratory for Computational Physics, Naval Research Laboratory, Washington, D.C. 20375 (United States)
  4. SAIC, McLean, Virginia 22310 (United States)
Publication Date:
OSTI Identifier:
20216069
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LASER TARGETS; INERTIAL FUSION DRIVERS; INERTIAL CONFINEMENT; DEUTERIUM; TRITIUM; RAYLEIGH-TAYLOR INSTABILITY; FOAMS; GAIN; PHYSICAL RADIATION EFFECTS; EXPERIMENTAL DATA

Citation Formats

Colombant, D. G., Bodner, S. E., Schmitt, A. J., Klapisch, M., Gardner, J. H., Aglitskiy, Y., Deniz, A. V., Obenschain, S. P., Pawley, C. J., and Serlin, V. Effects of radiation on direct-drive laser fusion targets. United States: N. p., 2000. Web. doi:10.1063/1.874026.
Colombant, D. G., Bodner, S. E., Schmitt, A. J., Klapisch, M., Gardner, J. H., Aglitskiy, Y., Deniz, A. V., Obenschain, S. P., Pawley, C. J., & Serlin, V. Effects of radiation on direct-drive laser fusion targets. United States. doi:10.1063/1.874026.
Colombant, D. G., Bodner, S. E., Schmitt, A. J., Klapisch, M., Gardner, J. H., Aglitskiy, Y., Deniz, A. V., Obenschain, S. P., Pawley, C. J., and Serlin, V. Mon . "Effects of radiation on direct-drive laser fusion targets". United States. doi:10.1063/1.874026.
@article{osti_20216069,
title = {Effects of radiation on direct-drive laser fusion targets},
author = {Colombant, D. G. and Bodner, S. E. and Schmitt, A. J. and Klapisch, M. and Gardner, J. H. and Aglitskiy, Y. and Deniz, A. V. and Obenschain, S. P. and Pawley, C. J. and Serlin, V.},
abstractNote = {The role played by radiation in the radiation-preheated direct-drive laser fusion target design is discussed. The soft x-rays emitted during the foot of the laser pulse--at a few 10{sup 12} W/cm{sup 2}--preheat the low-opacity foam ablator which helps to control the Rayleigh-Taylor instability. The foam opacity is, however, thick enough to stop that radiation, keeping the fuel on a low adiabat. Radiation effects are also important in the blow-off corona of the target because they establish a long scale-length plasma. This may help to shield the ablation region from the nonuniformities in the laser absorption. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.874026},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 7,
place = {United States},
year = {2000},
month = {5}
}