Developing one-dimensional implosions for inertial confinement fusion science

作     者：J.L.Kline S.A.Yi A.N.Simakov R.E.Olson D.C.Wilson G.A.Kyrala T.S.Perry S.H.Batha E.L.Dewald J.E.Ralph D.J.Strozzi A.G.MacPhee D.A.Callahan D.Hinkel O.A.Hurricane R.J.Leeper A.B.Zylstra R.R.Peterson B.M.Haines L.Yin P.A.Bradley R.C.Shah T.Braun J.Biener B.J.Kozioziemski J.D.Sater M.M.Biener A.V.Hamza A.Nikroo L.F.Berzak Hopkins D.Ho S.LePape N.B.Meezan D.S.Montgomery W.S.Daughton E.C.Merritt T.Cardenas E.S.Dodd 

作者机构：Los Alamos National Laboratory Lawrence Livermore National Laboratory 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2016年第4卷第4期

页      面：1-7页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was performed under the auspices of the US Department of Energy by LANL under Contract DEAC52-06NA25396 and by LLNL under Contract DE-AC5 2-07NA27344 

主　　题：beryllium capsules double shells inertial confinement fusion liquid layers 

摘      要：Experiments on the National Ignition Facility show that multi-dimensional effects currently dominate the implosion performance. Low mode implosion symmetry and hydrodynamic instabilities seeded by capsule mounting features appear to be two key limiting factors for implosion performance. One reason these factors have a large impact on the performance of inertial confinement fusion implosions is the high convergence required to achieve high fusion *** tackle these problems, a predictable implosion platform is needed meaning experiments must trade-off high gain for performance. LANL has adopted three main approaches to develop a one-dimensional(1D) implosion platform where 1D means measured yield over the 1D clean calculation. A high adiabat, low convergence platform is being developed using beryllium capsules enabling larger case-to-capsule ratios to improve symmetry. The second approach is liquid fuel layers using wetted foam targets. With liquid fuel layers, the implosion convergence can be controlled via the initial vapor pressure set by the target fielding temperature. The last method is double shell targets. For double shells, the smaller inner shell houses the DT fuel and the convergence of this cavity is relatively small compared to hot spot ignition. However,double shell targets have a different set of trade-off versus advantages. Details for each of these approaches are described.