Direct-drive shock-ignition for the Laser MégaJoule

Canaud, B.; Brandon, V.; Laffite, S.; Temporal, M.; Ramis, R.

doi:10.1051/epjconf/20135903003

Cited by 3 publications

(1 citation statement)

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“…Here, we will present the symmetry analysis of a shock-ignition proposal [6,7] for the LMJ facility. In this facility, laser beam are organized in six cones around the vertical axis of the chamber, and the proposal considers to use two or four cones to irradiate directly a spherical capsule.…”

Section: Shock Ignition At Lmjmentioning

confidence: 99%

Symmetry issues in Directly Irradiated Targets

Ramis

Temporal

Canaud

et al. 2013

EPJ Web of Conferences

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Abstract. In direct drive Inertial Confinement Fusion (ICF), the typical laser beam to laser beam angle is around 30 • . This fact makes the study of the irradiation symmetry a genuine 3D problem. In this paper we use the three dimensional version of the MULTI hydrocode to assess the symmetry of such ICF implosions. More specifically, we study a shock-ignition proposal for the Laser-Mégajoule facility (LMJ) in which two of the equatorial beam cones are used to implode and precompress a spherical capsule (the "reference" capsule of HiPER project) made of 0.59 mg of pure Deuterium-Tritium mixture. The symmetry of this scheme is analysed and optimized to get a design inside the operating limits of LMJ. The studied configuration has been found essentially axial-symmetric, so that the use of 2D hydrocodes would be appropriate for this specific situation.

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Section: Shock Ignition At Lmjmentioning

confidence: 99%

Symmetry issues in Directly Irradiated Targets

Ramis

Temporal

Canaud

et al. 2013

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

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Three-dimensional symmetry analysis of a direct-drive irradiation scheme for the laser megajoule facility

et al. 2014

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The symmetry of a Direct-Drive (DD) irradiation scheme has been analyzed by means of three-dimensional (3D) simulations carried out by the code MULTI (R. Ramis et al., Comput. Phys. Commun. 49, 475 (1988)) that includes hydrodynamics, heat transport, and 3D laser ray-tracing. The implosion phase of a target irradiated by the Laser Megajoule (LMJ) facility in the context of the Shock Ignition scheme has been considered. The LMJ facility has been designed for Indirect-Drive, and by this reason that the irradiation scheme must be modified when used for DD. Thus, to improve the implosion uniformity to acceptable levels, the beam centerlines should be realigned and the beam power balance should be adjusted. Several alternatives with different levels of complexity are presented and discussed.

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