Development of a polar direct drive platform for mix and burn experiments on the National Ignition Facility

8th International Conference on Inertial Fusion Sciences and Applications

Murphy, T.J.^1 ; Kyrala, G.A.^1 ; Krasheninnikova, N.S.^1 ; Bradley, P.A.^1 ; Cobble, J.A.^1 ; Tregillis, I.L.^1 ; Obrey, K.A.D.^1 ; Baumgaertel, J.A.^1 ; Hsu, S.C.^1 ; Shah, R.C.^1 ; Hakel, P.^1 ; Kline, J.L.^1 ; Schmitt, M.J.^1 ; Kanzleiter, R.J.^1 ; Batha, S.H.^1 ; Wallace, R.J.^2 ; Bhandarkar, S.^2 ; Fitzsimmons, P.^3 ; Hoppe, M.^3 ; Nikroo, A.^3 ; McKenty, P.^4

Los Alamos National Laboratory, P. O. Box 1663, Los Alamos

NM

87544, United States^1

Lawrence Livemore National Laboratory, 7000 East Ave, Livermore

CA

94550, United States^2

General Atomics, P. O. Box 85608, San Diego

CA

92186, United States^3

University of Rochester, Laboratory for Laser Energetics, 250 E. River Rd, Rochester

NY

14623, United States^4

关键词: Capsule surfaces;    Convergent geometry;    National ignition facility;    Neutron imaging;    Nuclear measurement;    Plastic-shells;    Polar direct drives;    Shell materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/688/1/012075/pdf
DOI  :  10.1088/1742-6596/688/1/012075

来源: IOP

【 摘 要 】

Capsules driven with polar drive [1, 2] on the National Ignition Facility [3] are being used [4] to study mix in convergent geometry. In preparation for experiments that will utilize deuterated plastic shells with a pure tritium fill, hydrogen-filled capsules with copper- doped deuterated layers have been imploded on NIF to provide spectroscopic and nuclear measurements of capsule performance. Experiments have shown that the mix region, when composed of shell material doped with about 1% copper (by atom), reaches temperatures of about 2 keV, while undoped mixed regions reach about 3 keV. Based on the yield from these implosions, we estimate the thickness of CD that mixed into the gas as between about 0.25 and 0.43 μm of the inner capsule surface, corresponding to about 5 to 9 μg of material. Using 5 atm of tritium as the fill gas should result in over 1013DT neutrons being produced, which is sufficient for neutron imaging [5].