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Title: High performance capsule implosions on the OMEGA Laser facility with rugby hohlraums

Abstract

Rugby-shaped hohlraums have been proposed as a method for x-ray drive enhancement for indirectly driven capsule implosions. This concept has recently been tested in a series of shots on the OMEGA laser facility [T. R. Boehly, D. L. Brown, R. S. Craxton et al., Opt. Commun. 133, 495 (1997)]. In this paper, experimental results are presented comparing the performance of D{sub 2}-filled capsules between standard cylindrical Au hohlraums and rugby-shaped hohlraums. The rugby hohlraums demonstrated 18% more x-ray drive energy as compared with the cylinders, and the high-performance design of these implosions (both cylinder and rugby) also provided {approx_equal}20x more deuterium (DD) neutrons than any previous indirectly driven campaign on OMEGA and {approx_equal}3x more than ever achieved on NOVA [E. M. Campbell, Laser Part. Beams 9, 209 (1991)] implosions driven with nearly twice the laser energy. This increase in performance enables, for the first time, a measurement of the neutron burn history and imaging of the neutron core shapes in an indirectly driven implosion. Previous DD neutron yields had been too low to register this key measurement of capsule performance and the effects of dynamic mix. A wealth of additional data on the fuel areal density from the suite ofmore » charged particle diagnostics was obtained on a subset of the shots that used D {sup 3}He rather than D{sub 2} fuel. Comparisons of the experimental results with numerical simulations are shown to be in very good agreement. The design techniques employed in this campaign, e.g., smaller laser entrance holes and hohlraum case-to-capsule ratios, provide added confidence in the pursuit of ignition on the National Ignition Facility [J. D. Lindl, P. Amendt, R. L. Berger et al., Phys. Plasmas 11, 339 (2004)].« less

Authors:
; ; ; ; ; ; ; ; ;  [1]; ; ; ; ; ;  [2]; ; ; ;  [3]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  2. CEA, DAM, DIF, F-91297 Arpajon (France)
  3. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
Publication Date:
OSTI Identifier:
21371299
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 17; Journal Issue: 5; Other Information: DOI: 10.1063/1.3360926; (c) 2010 American Institute of Physics; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CAPSULES; COMPUTERIZED SIMULATION; DEUTERIUM; HELIUM; IMPLOSIONS; LASERS; PERFORMANCE; PLASMA DIAGNOSTICS; X RADIATION; CONTAINERS; ELECTROMAGNETIC RADIATION; ELEMENTS; FLUIDS; GASES; HYDROGEN ISOTOPES; IONIZING RADIATIONS; ISOTOPES; LIGHT NUCLEI; NONMETALS; NUCLEI; ODD-ODD NUCLEI; RADIATIONS; RARE GASES; SIMULATION; STABLE ISOTOPES

Citation Formats

Robey, H F, Amendt, P, Park, H -S, Town, R P. J., Milovich, J L, Doeppner, T, Hinkel, D E, Wallace, R, Sorce, C, Strozzi, D J, Philippe, F, Casner, A, Caillaud, T, Landoas, O, Liberatore, S, Monteil, M -C, Seguin, F, Rosenberg, M, Li, C K, and Petrasso, R. High performance capsule implosions on the OMEGA Laser facility with rugby hohlraums. United States: N. p., 2010. Web. doi:10.1063/1.3360926.
Robey, H F, Amendt, P, Park, H -S, Town, R P. J., Milovich, J L, Doeppner, T, Hinkel, D E, Wallace, R, Sorce, C, Strozzi, D J, Philippe, F, Casner, A, Caillaud, T, Landoas, O, Liberatore, S, Monteil, M -C, Seguin, F, Rosenberg, M, Li, C K, & Petrasso, R. High performance capsule implosions on the OMEGA Laser facility with rugby hohlraums. United States. doi:10.1063/1.3360926.
Robey, H F, Amendt, P, Park, H -S, Town, R P. J., Milovich, J L, Doeppner, T, Hinkel, D E, Wallace, R, Sorce, C, Strozzi, D J, Philippe, F, Casner, A, Caillaud, T, Landoas, O, Liberatore, S, Monteil, M -C, Seguin, F, Rosenberg, M, Li, C K, and Petrasso, R. Sat . "High performance capsule implosions on the OMEGA Laser facility with rugby hohlraums". United States. doi:10.1063/1.3360926.
@article{osti_21371299,
title = {High performance capsule implosions on the OMEGA Laser facility with rugby hohlraums},
author = {Robey, H F and Amendt, P and Park, H -S and Town, R P. J. and Milovich, J L and Doeppner, T and Hinkel, D E and Wallace, R and Sorce, C and Strozzi, D J and Philippe, F and Casner, A and Caillaud, T and Landoas, O and Liberatore, S and Monteil, M -C and Seguin, F and Rosenberg, M and Li, C K and Petrasso, R},
abstractNote = {Rugby-shaped hohlraums have been proposed as a method for x-ray drive enhancement for indirectly driven capsule implosions. This concept has recently been tested in a series of shots on the OMEGA laser facility [T. R. Boehly, D. L. Brown, R. S. Craxton et al., Opt. Commun. 133, 495 (1997)]. In this paper, experimental results are presented comparing the performance of D{sub 2}-filled capsules between standard cylindrical Au hohlraums and rugby-shaped hohlraums. The rugby hohlraums demonstrated 18% more x-ray drive energy as compared with the cylinders, and the high-performance design of these implosions (both cylinder and rugby) also provided {approx_equal}20x more deuterium (DD) neutrons than any previous indirectly driven campaign on OMEGA and {approx_equal}3x more than ever achieved on NOVA [E. M. Campbell, Laser Part. Beams 9, 209 (1991)] implosions driven with nearly twice the laser energy. This increase in performance enables, for the first time, a measurement of the neutron burn history and imaging of the neutron core shapes in an indirectly driven implosion. Previous DD neutron yields had been too low to register this key measurement of capsule performance and the effects of dynamic mix. A wealth of additional data on the fuel areal density from the suite of charged particle diagnostics was obtained on a subset of the shots that used D {sup 3}He rather than D{sub 2} fuel. Comparisons of the experimental results with numerical simulations are shown to be in very good agreement. The design techniques employed in this campaign, e.g., smaller laser entrance holes and hohlraum case-to-capsule ratios, provide added confidence in the pursuit of ignition on the National Ignition Facility [J. D. Lindl, P. Amendt, R. L. Berger et al., Phys. Plasmas 11, 339 (2004)].},
doi = {10.1063/1.3360926},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 17,
place = {United States},
year = {2010},
month = {5}
}