Reaching a burning plasma and ignition using smaller capsules/Hohlraums, higher radiation temperatures, and thicker ablator/ice on the national ignition facility

Baker, K. L.; Thomas, C. A.; Landen, O. L.; Haan, S.; Lindl, J. D.; Casey, D. T.; Young, C.; Nora, R.; Hurricane, O. A.; Callahan, D. A.; Jones, O.; Berzak Hopkins, L.; Khan, S.; Spears, B. K.; Le Pape, S.; Meezan, N. B.; Ho, D. D.; Döppner, T.; Hinkel, D.; Dewald, E. L.; Tommasini, R.; Hohenberger, M.; Weber, C.; Clark, D.; Woods, D. T.; Milovich, J. L.; Strozzi, D.; Kritcher, A.; Robey, H. F.; Ross, J. S.; Smalyuk, V. A.; Amendt, P. A.; Bachmann, B.; Benedetti, L. R.; Bionta, R.; Celliers, P. M.; Fittinghoff, D.; Goyon, C.; Hatarik, R.; Izumi, N.; Gatu Johnson, M.; Kyrala, G.; Ma, T.; Meaney, K.; Millot, M.; Nagel, S. R.; Patel, P. K.; Turnbull, D.; Volegov, P. L.; Yeamans, C.; Wilde, C.

doi:10.1063/5.0131180

Title: Reaching a burning plasma and ignition using smaller capsules/Hohlraums, higher radiation temperatures, and thicker ablator/ice on the national ignition facility

Journal Article · Mon Mar 06 00:00:00 EST 2023 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0131180· OSTI ID:2280485

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Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
University of Rochester, NY (United States). Laboratory for Laser Energetics
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

In indirect-drive implosions, the final core hot spot energy and pressure and, hence, neutron yield attainable in 1D increase with increasing laser peak power and, hence, radiation drive temperature at the fixed capsule and Hohlraum size. Here we present simple analytic scalings validated by 1D simulations that quantify the improvement in performance and use this to explain existing data and simulation trends. Extrapolating to the 500 TW National Ignition Facility peak power limit in a low gas-fill 5.4 mm diameter Hohlraum based on existing high adiabat implosion data at 400 TW, 1.3 MJ and 1 × 10¹⁶ yield, we find that a 2–3 × 10¹⁷ yield (0.5–0.7 MJ) is plausible using only 1.8 MJ of laser energy. Based on existing data varying deuterium–tritium (DT) fuel thickness and dopant areal density, further improvements should be possible by increasing DT fuel areal density, and hence confinement time and yield amplification.

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); General Atomics

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

OSTI ID:: 2280485

Alternate ID(s):: OSTI ID: 1960092

Report Number(s):: LLNL-JRNL-830844; 1047234

Journal Information:: Physics of Plasmas, Vol. 30, Issue 3; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Title: Reaching a burning plasma and ignition using smaller capsules/Hohlraums, higher radiation temperatures, and thicker ablator/ice on the national ignition facility

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