Noncontact thermal gradient method for fabrication of uniform cryogenic inertial fusion target

Kim, K.; Mok, L.; Erlenborn, M. J.; Bernat, T. P.

doi:10.1116/1.573105

Cited by 21 publications

(2 citation statements)

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“…All high gain target designs for inertial confinement fusion (ICF) employ uniform layers of condensed DT to achieve efficient ignition of the fuel [ 11. Various routes to the formation of these layers within target shells have' been investigated [2], and the most promising method relies on the radioactive self heating of condensed DT to redistribute the solid along the isotherms in the fuel container [3], [4], [5]. This process is referred to as "beta layering".…”

Section: Introductionmentioning

confidence: 99%

Cryogenic D-T Fuel Layers Formed in 1 mm Spheres by Beta-Layering

et al. 1999

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Solid D-T fuel smoothly layered on the interior of spherical capsules is required for all inertial confinement fusion ignition target designs. One process for forming these layers, beta-layering, has been studied in surrogate geometries such as open cylinders or tori to allow accurate characterization of the DT surfaces. We present the first results from beta layering in 1 mm spherical containers, such as will be used in upcoming Omega experiments. These results are also directly relevant to ignition capsules for the National Ignition Facility. We find that layers can form with roughness as small as 1.2 microns rms, and that results are strongly dependent upon freezing rate as well as layer thickness.

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Section: Introductionmentioning

confidence: 99%

Cryogenic D-T Fuel Layers Formed in 1 mm Spheres by Beta-Layering

et al. 1999

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“…A fabrication technique for reactor applications must not only successfully counter gravitational slumping, but must do so in a manner which allows high repetition rate production and injection into a target chamber at acceptably low unit costs. A number of approaches to this problem, which might be scalable to reactor capsules, have been suggested [1,2].…”

Section: Introductionmentioning

confidence: 99%

Direct drive cryogenic ICF capsules employing D-T wetted foam

Sacks

Darling

1987

Nucl. Fusion

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One roadblock to ICF (inertial confinement fusion) power production has been the difficulty of formation of thick, uniform cryogenic spherical shells of D-T at an acceptable cost and repetition rate. A new approach to this problem is proposed: the use of a small pore size, open cell, rigid foam structure as a sponge to precisely define the layer contours and to stabilize the liquid against gravitational slumping. * Work performed under the auspices of the US Department of Energy by the Lawrence Livermore National Laboratory under Contract number W-7405-ENG-48.

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