Polar-direct-drive experiments at the National Ignition Facility

[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.

[发布机构] 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