Description of the NIF Laser

Spaeth, M. L.; Manes, Kenneth R.; Kalantar, D. H.; Miller, Philip E.; Heebner, John E.; Bliss, Erlan S.; Spec, D.; Parham, T; Whitman, Pamela K.; Wegner, Paul J.; Baisden, P. A.; Menapace, Joseph A.; Bowers, M. W.; Cohen, Simon J.; Suratwala, Tayyab; Nicola, J. M. Di; Newton, Mark A.; Adams, John J.; Trenholme, John B.; Finucane, R. G.; Bonanno, R. E.; Rardin, D.; Arnold, P.; Dixit, S. N.; Erbert, G.; Erlandson, Alvin C.; Fair, J.; Feigenbaum, Eyal; Gourdin, William H.; Hawley, R. A.; Honig, J.; House, R.K.; Jancaitis, K.; LaFortune, K. N.; Larson, D.; Galloudec, Bruno J. Le; Lindl, J. D.; MacGowan, B. J.; Marshall, C. D.; McCandless, Kathleen; McCracken, R. W.; Montesanti, R C; Moses, E. I.; Nostrand, Mike C.; Pryatel, James A.; Roberts, V.; Rodríguez, Sebastián; Rowe, Arlen W.; Sacks, Richard A.; Salmon, J. T.; Shaw, Michael J.; Sommer, S.; Stolz, Christopher J.; Tietbohl, G.; Widmayer, C.; Zacharias, R.

doi:10.13182/fst15-144

Cited by 226 publications

(77 citation statements)

References 103 publications

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“…Examples include the study of the properties of stellar and planetary interiors (3, 4), stellar and planetary formation dynamics (5, 6), stellar explosions (supernovas) (7, 8), gamma-ray bursts (9), galactic mergers (10), and inertial confinement fusion (ICF) implosions (11–13). Aspects of these phenomena can be accessed in the laboratory using high-energy, high-power lasers, such as the National Ignition Facility (NIF) laser at Lawrence Livermore National Laboratory (LLNL) (14, 15) and the Omega laser (16) at the University of Rochester. An example of ICF research on the NIF is illustrated in Fig.…”

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confidence: 99%

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Remington

Park

Casey

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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The Rayleigh-Taylor (RT) instability occurs at an interface between two fluids of differing density during an acceleration. These instabilities can occur in very diverse settings, from inertial confinement fusion (ICF) implosions over spatial scales of [Formula: see text] cm (10-1,000 μm) to supernova explosions at spatial scales of [Formula: see text] cm and larger. We describe experiments and techniques for reducing ("stabilizing") RT growth in high-energy density (HED) settings on the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. Three unique regimes of stabilization are described: () at an ablation front, () behind a radiative shock, and () due to material strength. For comparison, we also show results from nonstabilized "classical" RT instability evolution in HED regimes on the NIF. Examples from experiments on the NIF in each regime are given. These phenomena also occur in several astrophysical scenarios and planetary science [Drake R (2005) 47:B419-B440; Dahl TW, Stevenson DJ (2010) 295:177-186].

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confidence: 99%

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Remington

Park

Casey

et al. 2018

Proc. Natl. Acad. Sci. U.S.A.

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“…Two-photon polymerization (2PP) is a direct-write technology that has recently been used to create millimeter-scale laser target components to support the Department of Energy’s (DOE) High Energy Density (HED) research programs [ 1 , 2 , 3 , 4 ]. In the first published work in this area, Bernat et al [ 5 ] and Jiang et al [ 6 ] report the use of 2PP to print simulated fill tubes and low-density foam-like structures, respectively.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of Foam Laser Targets Fabricated by Two-Photon Polymerization

Liu

Campbell²,

Stein

et al. 2018

Nanomaterials

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Two-photon polymerization (2PP), which is a three-dimensional micro/nano-scale additive manufacturing process, is used to fabricate component for small custom experimental packages (“targets”) to support laser-driven, high-energy-density physics research. Of particular interest is the use of 2PP to deterministically print millimeter-scale, low-density, and low atomic number (CHO) polymer matrices (“foams”). Deformation during development and drying of the foam structures remains a challenge when using certain commercial acrylic photo-resins. Acrylic resins were chosen in order to meet the low atomic number requirement for the foam; that requirement precludes the use of low-shrinkage organic/inorganic hybrid resins. Here, we compare the use of acrylic resins IP-S and IP-Dip. Infrared and Raman spectroscopy are used to quantify the extent of the polymerization during 2PP vs. UV curing. The mechanical strength of beam and foam structures is examined, particularly the degree of deformation that occurs during the development and drying processes. The magnitude of the shrinkage is quantified, and finite element analysis is used in order to simulate the resulting deformation. Capillary drying forces during development are shown to be small and are likely below the elastic limit of the foam log-pile structures. In contrast, the substantial shrinkage in IP-Dip (~5–10%) causes large shear stresses and associated plastic deformation, particularly near constrained boundaries and locations with sharp density transitions. Use of IP-S with an improved writing procedure results in a marked reduction in deformation with a minor loss of resolution.

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“…α+T→α′+T″ (>14 MeV) D″+T″→α+n″ (15)(16)(17)(18)(19)(20) target nucleus, in turn leading to a (n, γ) cross section (σ NHEDP ) different from reactions taking place on the nuclear ground states (σ GS ). This difference, referred to as the SEF, can currently only be obtained using statistical reaction modeling and is expected to have significant uncertainties: where σ i represents the neutron capture cross section from an excited nuclear level i.…”

Section: Line Of Sightmentioning

confidence: 99%

Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research

Cerjan

Bernstein

Hopkins

et al. 2018

J. Phys. G: Nucl. Part. Phys.

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The generation of dynamic high energy density plasmas in the pico-to nanosecond time domain at high-energy laser facilities affords unprecedented nuclear science research possibilities. At the National Ignition Facility (NIF), the primary goal of inertial confinement fusion research has led to the synergistic development of a unique high brightness neutron source, sophisticated nuclear diagnostic instrumentation, and versatile experimental platforms. These novel experimental capabilities provide a new path to investigate nuclear processes and structural effects in the time, mass and energy density domains relevant to astrophysical phenomena in a unique terrestrial environment. Some immediate applications include neutron capture cross-section evaluation, fission fragment production, and ion energy loss measurement in

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Description of the NIF Laser

Cited by 226 publications

References 103 publications

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility

Deformation Behavior of Foam Laser Targets Fabricated by Two-Photon Polymerization

Dynamic high energy density plasma environments at the National Ignition Facility for nuclear science research

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