Hydrodynamic simulations of long-scale-length plasmas for two-plasmon-decay planar-target experiments on the NIF

9th International Conference on Inertial Fusion Sciences and Applications

Solodov, A.A.^1 ; Rosenberg, M.J.^1 ; Myatt, J.F.^1 ; Epstein, R.^1 ; Regan, S.P.^1 ; Seka, W.^1 ; Shaw, J.^1 ; Hohenberger, M.^1 ; Bates, J.W.^2 ; Moody, J.D.^3 ; Ralph, J.E.^3 ; Turnbull, D.P.^3 ; Barrios, M.A.^3

Laboratory for Laser Energetics, University of Rochester, Rochester 250 East River Road, Rochester

NY

14623-1299, United States^1

Naval Research Laboratory, Washington

DC, United States^2

Lawrence Livermore National Laboratory, Livermore

CA, United States^3

关键词: Direct-drive ignition;    Experimental platform;    Hard x-ray emission;    High-energy electron;    Hydrodynamic simulation;    Irradiation geometries;    Laser-plasma instabilities;    National ignition facility;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012053/pdf
DOI  :  10.1088/1742-6596/717/1/012053

来源: IOP

【 摘 要 】

The two-plasmon-decay (TPD) instability can be detrimental for direct-drive inertial confinement fusion because it generates high-energy electrons that can preheat the target, thereby reducing target performance. Hydrodynamic simulations to design a new experimental platform to investigate TPD and other laser-plasma instabilities relevant to direct-drive-ignition implosions at the National Ignition Facility are presented. The proposed experiments utilize planar plastic targets with an embedded Mo layer to characterize generation of hot electrons through Mo Kαfluorescence and hard x-ray emission. Different laser-irradiation geometries approximate conditions near both the equator and the pole of a polar-direct-drive implosion.