The Ignition Physics Campaign on NIF: Status and Progress

8th International Conference on Inertial Fusion Sciences and Applications

Edwards, M.J.^1

Lawrence Livermore National Laboratory, Livermore

CA

94551, United States^1

关键词: Ablation fronts;    Cross beams;    High yield;    Hohlraums;    Neutron yields;    Self-heating;    Simulated performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012017/pdf
DOI  :  10.1088/1742-6596/688/1/012017

来源: IOP

【 摘 要 】

We have made significant progress in ICF implosion performance on NIF since the 2011 IFSA. Employing a 3-shock, high adiabat CH (High-Foot) design, total neutron yields have increased 10-fold to 6.3 x1015(a yield of ∼ 17 kJ, which is greater than the energy invested in the DT fuel ∼ 12kJ). At that level, the yield from alpha self-heating is essentially equivalent to the compression yield, indicating that we are close to the alpha self-heating regime. Low adiabat, 4-shock High Density Carbon (HDC) capsules have been imploded in conventional gas-filled hohlraums, and employing a 6 ns, 2-shock pulse, HDC capsules were imploded in near-vacuum hohlraums with overall coupling ∼ 98%. Both the 4- and 2-shock HDC capsules had very low mix and high yield over simulated performance. Rugby holraums have demonstrated uniform x-ray drive with minimal Cross Beam Energy Transfer (CBET), and we have made good progress in measuring and modelling growth of ablation front hydro instabilities.