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Symmetry issues in Directly Irradiated Targets
Ramis Abril, Rafael and Temporal, Mauro and Canaud, B. and Brandon, V.
Symmetry issues in Directly Irradiated Targets.
"EPJ Web of Conferences", v. 59
In direct drive Inertial Conﬁnement Fusion (ICF), the typical laser beam to laser beam angle is around 30o. This fact makes the study of the irradiation symmetry agenuine 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-M´egajoule facility (LMJ) in which two of the equatorial beam cones are used to implode and pre compress 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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