Two-dimensional simulation of heavy ion hohlraum targets

Honrubia, J. J.; Ramis, R.; Ramírez, José Naranjo; Meyer‐ter‐Vehn, Jürgen; Ibáñez, L. F.; Piriz, A. R.; Sanz, J.; Sanchez, M.; Torre, Maria De La

doi:10.1016/s0168-9002(98)00376-3

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Our initial experiments are quite promisingshowing a reduction in P 4 from 4.5% down to 1.6%. We expect that by increasing the thickness of the shim layer slightly, we could reduce the P 4 even further-future experiments will test thicker shim layers with the goal of zeroing and reversing P 4 . In addition, we are working on improved methods for characterizing the shim layers; we hope that better characterization will help us understand why we see a reversal in P 2 in the experiments.…”

Section: Discussionmentioning

confidence: 99%

“…By varying the thickness of the shim layer, we expect that we will be able to zero and reverse P 4 ; future experiments will measure the asymmetry as a function of shim thickness. This is the first step in developing this technique-which should be applicable to any indirect drive target.…”

Section: Experimental Test Of Shimsmentioning

confidence: 99%

“…We call this design a 'hybrid' target because it is a hybrid of our distributed radiator designs [1,2] and the end radiator design of Ho [3]. It is similar to the 'foam target' of Honrubia [4].…”

Section: Hybrid Target Designmentioning

confidence: 99%

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Advances in target design for heavy ion fusion

Callahan

Tabak

Bennett

et al. 2005

Plasma Phys. Control. Fusion

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Over the past few years, the emphasis in heavy ion target design has moved from the distributed radiator target to the "hybrid" target because the hybrid target allows a larger beam focal spot than the distributed radiator (~ 5 mm radius rather than ~ 2 mm radius). The larger spot relaxes some of the requirements on the driver, but introduces some new target physics issues. Most notable is the use of shine shields and shims in the hohlraum to achieve symmetry rather than achieving symmetry by beam placement.The shim is a thin layer of material placed on or near the capsule surface to block a small amount of excess radiation. While we have been developing this technique for the heavy ion hybrid target, the technique can be used in any indirect drive target. We have begun testing the concept of a shim to improve symmetry using a double-ended zpinch hohlraum on the Sandia Z-machine. Experiments using shimmed thin wall capsules have shown that we can reverse the sign of a P 2 asymmetry and significantly reduce the size of a P 4 asymmetry. These initial experiments demonstrate the concept of a shim as another method for controlling early time asymmetries in ICF capsules.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Test Of Shimsmentioning

confidence: 99%

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Advances in target design for heavy ion fusion

Callahan

Tabak

Bennett

et al. 2005

Plasma Phys. Control. Fusion

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show abstract

“…The initial goal of this project was to demonstrate ignition with heavy ions [6,7,8]. Next phases were devoted to the design of high-gain targets for a future IFE facility [7,9].…”

Section: Target Design For Heavy Ion Fusionmentioning

confidence: 99%