Beyond alpha-heating: driving inertially confined fusion implosions toward a burning-plasma state on the National Ignition Facility

Hurricane, O. A.; Callahan, D. A.; Springer, P. T.; Edwards, M. J.; Patel, P.; Baker, K.; Casey, D. T.; Divol, L.; Döppner, T.; Hinkel, D. E.; Berzak Hopkins, L. F.; Kritcher, A.; Le Pape, S.; Maclaren, S.; Masse, L.; Pak, A.; Pickworth, L.; Ralph, J.; Thomas, C.; Yi, A.; Zylstra, A.

doi:10.1088/1361-6587/aaed71

Title: Beyond alpha-heating: driving inertially confined fusion implosions toward a burning-plasma state on the National Ignition Facility

Journal Article · Thu Nov 01 00:00:00 EDT 2018 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/aaed71· OSTI ID:1524748

^[1]; Callahan, D. A. ^[1]; Springer, P. T. ^[1]; Edwards, M. J. ^[1]; Patel, P. ^[1]; Baker, K. ^[1]; Casey, D. T. ^[1]; Divol, L. ^[1]; Döppner, T. ^[1]; Hinkel, D. E. ^[1];

^[1]; Kritcher, A. ^[1]; Le Pape, S. ^[1]; Maclaren, S. ^[1]; Masse, L. ^[1]; Pak, A. ^[1]; Pickworth, L. ^[1]; Ralph, J. ^[1]; Thomas, C. ^[1]; Yi, A. ^[2] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Recent progress on indirectly-driven inertial confinement fusion (ICF) work at the National Ignition Facility (NIF) is briefly reviewed. An analytic criteria for an ICF burning plasma is given and compared to recent ICF implosion data from the NIF. Scaling of key hot-spot performance metrics is derived from simple physics considerations, including some speculative impacts of asymmetry on the assembly and disassembly of an ICF implosion. A steepest descent solution for the nonlinear equation for hot-spot pressure at peak compression, with the full effects of alpha-heating, is also given. To test if the scalings derived in this paper have some merit, they are compared to data from a variety of recent implosion campaigns on NIF and good agreement is observed. Given the implications of the scalings and existing data, a strategy for injecting more energy into the hot-spot of NIF indirectly driven ICF implosions is defined and the principles of the strategy is discussed. The importance of implosion velocity, late-time ablation pressure, and implosion scale with good symmetry in obtaining the goal of ~50% more hot-spot energy are highlighted along with the limitations of trying to leverage low fuel-adiabat.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1524748

Report Number(s):: LLNL-JRNL-756923; 944627

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 61, Issue 1; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 50 works

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References (54)

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Approaching a burning plasma on the NIF Hurricane, O. A.; Springer, P. T.; Patel, P. K. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5087256	journal	May 2019
Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities Zhou, Ye; Clark, Timothy T.; Clark, Daniel S. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5088745	journal	August 2019
Implosion performance of subscale beryllium capsules on the NIF Zylstra, A. B.; MacLaren, S.; Yi, S. A. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5098319	journal	May 2019
On alpha-particle transport in inertial fusion Zylstra, A. B.; Hurricane, O. A. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5101074	journal	June 2019

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