Laser-plasma interaction in direct-drive inertial confinement fusion

9th International Conference on Inertial Fusion Sciences and Applications

Myatt, J.F.^1,2 ; Shaw, J.^1 ; Goncharov, V.N.^1,2 ; Zhang, J.^1,2 ; Maximov, A.V.^1,2 ; Short, R.W.^1 ; Follett, R.K.^3 ; Seka, W.^1 ; Edgell, D.H.^1 ; Froula, D.H.^1,3

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

NY

14623-1299, United States^1

Department of Mechanical Engineering, University of Rochester, United States^2

Department of Physics, University of Rochester, United States^3

关键词: Ablators;    Direct drive;    Direct-drive targets;    Electron production;    Laser-plasma interactions;    Mitigation strategy;    Two plasmon decay;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012040/pdf
DOI  :  10.1088/1742-6596/717/1/012040

来源: IOP

【 摘 要 】

Hot electrons generated by the two-plasmon-decay instability in direct-drive targets are a preheat concern. A mitigation strategy that employs a layered ablator [V. N. Goncharov et al., Phys. Plasmas 21, 056315 (2014)] has been investigated both numerically and experimentally. The numerical simulations described here predict reduced hot-electron production compared with similar targets using either a solid CH or Be ablator. These findings are shown to be consistent with experimental observations.