Polar-direct-drive experiments at the National Ignition Facility

9th International Conference on Inertial Fusion Sciences and Applications

Radha, P.B.^1 ; Hohenberger, M.^1 ; Marshall, F.J.^1 ; Michel, D.T.^1 ; Bates, J.^2 ; Boehly, T.R.^1 ; Collins, T.J.B.^1 ; Craxton, R.S.^1 ; Delettrez, J.A.^1 ; Dixit, S.N.^3 ; Edgell, D.H.^1 ; Frenje, J.A.^4 ; Froula, D.H.^1 ; Goncharov, V.N.^1 ; Hu, S.X.^1 ; Karasik, M.^2 ; Knauer, J.P.^1 ; Lepape, S.^3 ; Marozas, J.A.^1 ; McCrory, R.L.^1 ; McKenty, P.W.^1 ; Meyerhofer, D.D.^5 ; Myatt, J.F.^1 ; Obenschein, S.^2 ; Petrasso, R.D.^4 ; Regan, S.P.^1 ; Rosenberg, M.J.^1 ; Sangster, T.C.^1 ; Seka, W.^1 ; Shvydky, A.^1 ; Sio, H.^4 ; Skupsky, S.^1 ; Zylstra, A.^4

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

NY

14623-1299, United States^1

Naval Research Laboratory, SW, Washington

DC

20375, United States^2

Lawrence Livermore Laboratory, Livermore

CA

94550, United States^3

Plasma Fusion Science Center, Massachusetts Institute of Technology, Cambridge

MA

02139, United States^4

Los Alamos National Laboratory, NM

87545, United States^5

关键词: Cross beams;    Direct drive implosion;    Energy couplings;    Fast electrons;    National ignition facility;    Polar direct drives;    Two plasmon decay;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012009/pdf
DOI  :  10.1088/1742-6596/717/1/012009

来源: IOP

【 摘 要 】

Polar-direct-drive experiments at the National Ignition Facility (NIF) are being used to validate direct-drive-implosion models. Energy coupling and fast-electron preheat are the primary issues being studied in planar and imploding geometries on the NIF. Results from backlit images from implosions indicate that the overall drive is well modeled although some differences remain in the thickness of the imploding shell. Implosion experiments to mitigate cross-beam energy transfer and preheat from two-plasmon decay are planned for the next year.