Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility

Zylstra, Alex B.; Yi, Sunghwan A.; MacLaren, S.; Kline, John L.; Kyrala, George Amine; Ralph, J.E.; Bae, J.; Batha, Steven H.; Callahan, D.; Flippo, Kirk Adler; Huang, H.; Hurricane, O.; Khan, S.F.; Kabadi, N.; Kong, C.; Kot, Lynn B.; Lahmann, B.; Loomis, Eric Nicholas; Masse, L.P.; Millot, M.; Moore, A.; Nikroo, A.; Perry, Theodore Sonne; Rice, N.; Salmonson, J.; Shah, R.; Sio, H.; Stadermann, M.; Strozzi, D.J.; Tipton, R.; Xu, H.

doi:10.1063/1.5041285

Beryllium capsule implosions at a case-to-capsule ratio of 3.7 on the National Ignition Facility

Journal Article · Tue Oct 16 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5041285· OSTI ID:1484649

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Beryllium is a candidate ablator material for indirect-drive inertial confinement fusion experiments, motivated by its high mass ablation rate, which is advantageous for implosion coupling efficiency and stabilization of the ablation-front instability growth. In this paper, we present new data on the shock propagation, in-flight shape, and hot spot self-emission shape from gas-filled capsules that demonstrate the feasibility of predictable, symmetric, controllable beryllium implosions at a case-to-capsule ratio of 3.7. The implosions are round (Legendre mode 2 amplitude ≲5%) at an inner beam power and the energy fraction of 26%–28% of the total, indicating that larger beryllium capsules could be driven symmetrically using the National Ignition Facility.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10

Grant/Contract Number:: 89233218CNA000001; AC52-07NA27344; NA0001808

OSTI ID:: 1484649

Alternate ID(s):: OSTI ID: 1477816

Report Number(s):: LA-UR-18-24386

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 25; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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