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Title: Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation

Abstract

An experimental campaign to study hohlraum-driven ignition-like double-shell target performance using the Omega laser facility has begun. These targets are intended to incorporate as many ignition-like properties of the proposed National Ignition Facility (NIF) double-shell ignition design [1,2] as possible, given the energy constraints of the Omega laser. In particular, this latest generation of Omega double-shells is nominally predicted to produce over 99% of the (clean) DD neutron yield from the compressional or stagnation phase of the implosion as required in the NIF ignition design. By contrast, previous double-shell experience on Omega [3] was restricted to cases where a significant fraction of the observed neutron yield was produced during the earlier shock convergence phase where the effects of mix are deemed negligibly small. These new targets are specifically designed to have optimized fall-line behavior for mitigating the effects of pusher-fuel mix after deceleration onset and, thereby, providing maximum neutron yield from the stagnation phase. Experimental results from this recent Omega ignition-like double-shell implosion campaign show favorable agreement with two-dimensional integrated hohlraum simulation studies when enhanced (gold) hohlraum M-band (2-5 keV) radiation is included at a level consistent with observations.

Authors:
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Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15005402
Report Number(s):
UCRL-JC-151998
TRN: US0305369
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 3rd IFSA Conference, Monterey, CA (US), 09/07/2003--09/12/2003; Other Information: PBD: 22 Aug 2003
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; OMEGA FACILITY; GOLD; IGNITION; IMPLOSIONS; LASERS; NEUTRONS; PERFORMANCE; US NATIONAL IGNITION FACILITY; DEUTERIUM

Citation Formats

Amendt, P, Robey, H F, Park, H-S, Tipton, R E, Turner, R E, Milovich, J, Rowley, D, Hibbard, R, Louis, H, Wallace, R, Garbett, W, Dunne, A M, Varnum, W S, Watt, R G, and Wilson, D C. Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation. United States: N. p., 2003. Web.
Amendt, P, Robey, H F, Park, H-S, Tipton, R E, Turner, R E, Milovich, J, Rowley, D, Hibbard, R, Louis, H, Wallace, R, Garbett, W, Dunne, A M, Varnum, W S, Watt, R G, & Wilson, D C. Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation. United States.
Amendt, P, Robey, H F, Park, H-S, Tipton, R E, Turner, R E, Milovich, J, Rowley, D, Hibbard, R, Louis, H, Wallace, R, Garbett, W, Dunne, A M, Varnum, W S, Watt, R G, and Wilson, D C. Fri . "Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation". United States. https://www.osti.gov/servlets/purl/15005402.
@article{osti_15005402,
title = {Hohlraum-Driven Ignition-Like Double-Shell Implosion Experiments on Omega: Analysis and Interpretation},
author = {Amendt, P and Robey, H F and Park, H-S and Tipton, R E and Turner, R E and Milovich, J and Rowley, D and Hibbard, R and Louis, H and Wallace, R and Garbett, W and Dunne, A M and Varnum, W S and Watt, R G and Wilson, D C},
abstractNote = {An experimental campaign to study hohlraum-driven ignition-like double-shell target performance using the Omega laser facility has begun. These targets are intended to incorporate as many ignition-like properties of the proposed National Ignition Facility (NIF) double-shell ignition design [1,2] as possible, given the energy constraints of the Omega laser. In particular, this latest generation of Omega double-shells is nominally predicted to produce over 99% of the (clean) DD neutron yield from the compressional or stagnation phase of the implosion as required in the NIF ignition design. By contrast, previous double-shell experience on Omega [3] was restricted to cases where a significant fraction of the observed neutron yield was produced during the earlier shock convergence phase where the effects of mix are deemed negligibly small. These new targets are specifically designed to have optimized fall-line behavior for mitigating the effects of pusher-fuel mix after deceleration onset and, thereby, providing maximum neutron yield from the stagnation phase. Experimental results from this recent Omega ignition-like double-shell implosion campaign show favorable agreement with two-dimensional integrated hohlraum simulation studies when enhanced (gold) hohlraum M-band (2-5 keV) radiation is included at a level consistent with observations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {8}
}

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