Experimental achievement and signatures of ignition at the National Ignition Facility

Zylstra, A. B.; Kritcher, A. L.; Hurricane, O. A.; Callahan, D. A.; Ralph, J. E.; Casey, D. T.; Pak, A.; Landen, O. L.; Bachmann, B.; Baker, K. L.; Berzak Hopkins, L.; Bhandarkar, S. D.; Biener, J.; Bionta, R. M.; Birge, N. W.; Braun, T.; Briggs, T. M.; Celliers, P. M.; Chen, H.; Choate, C.; Clark, D. S.; Divol, L.; Döppner, T.; Fittinghoff, D.; Edwards, M. J.; Gatu Johnson, M.; Gharibyan, N.; Haan, S.; Hahn, K. D.; Hartouni, E.; Hinkel, D. E.; Ho, D. D.; Hohenberger, M.; Holder, J. P.; Huang, H.; Izumi, N.; Jeet, J.; Jones, O.; Kerr, S. M.; Khan, S. F.; Geppert Kleinrath, H.; Geppert Kleinrath, V.; Kong, C.; Lamb, K. M.; Le Pape, S.; Lemos, N. C.; Lindl, J. D.; MacGowan, B. J.; Mackinnon, A. J.; MacPhee, A. G.; Marley, E. V.; Meaney, K.; Millot, M.; Moore, A. S.; Newman, K.; Di Nicola, J.-M. G.; Nikroo, A.; Nora, R.; Patel, P. K.; Rice, N. G.; Rubery, M. S.; Sater, J.; Schlossberg, D. J.; Sepke, S. M.; Sequoia, K.; Shin, S. J.; Stadermann, M.; Stoupin, S.; Strozzi, D. J.; Thomas, C. A.; Tommasini, R.; Trosseille, C.; Tubman, E. R.; Volegov, P. L.; Weber, C. R.; Wild, C.; Woods, D. T.; Yang, S. T.; Young, C. V.

doi:10.1103/physreve.106.025202

Title: Experimental achievement and signatures of ignition at the National Ignition Facility

Journal Article · Mon Aug 08 00:00:00 EDT 2022 · Physical Review. E

DOI:https://doi.org/10.1103/physreve.106.025202· OSTI ID:1959535

^[1]; Kritcher, A. L. ^[1]; Hurricane, O. A. ^[1]; Callahan, D. A. ^[1]; Ralph, J. E. ^[1]; Casey, D. T. ^[1]; Pak, A. ^[1]; Landen, O. L. ^[1]; Bachmann, B. ^[1]; Baker, K. L. ^[1]; Berzak Hopkins, L. ^[1]; Bhandarkar, S. D. ^[1]; Biener, J. ^[1]; Bionta, R. M. ^[1]; Birge, N. W. ^[2]; Braun, T. ^[1]; Briggs, T. M. ^[1]; Celliers, P. M. ^[1]; Chen, H. ^[1]; Choate, C. ^[1] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
General Atomics, San Diego, CA (United States)
Ecole Polytechnique, Palaiseau (France). Laboratoire pour l’utilisation des Lasers Intenses (LULI)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Focused Energy, Inc., Austin, TX (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Diamond Materials Gmbh, Freiburg (Germany)

An inertial fusion implosion on the National Ignition Facility, conducted on August 8, 2021 (N210808), recently produced more than a megajoule of fusion yield and passed Lawson's criterion for ignition [Phys. Rev. Lett. 129, 075001 (2022)]. Here we describe the experimental improvements that enabled N210808 and present the first experimental measurements from an igniting plasma in the laboratory. Ignition metrics like the product of hot-spot energy and pressure squared, in the absence of self-heating, increased by ~ 35%, leading to record values and an enhancement from previous experiments in the hot-spot energy (~ 3×), pressure (~ 2×), and mass (~ 2×). These results are consistent with self-heating dominating other power balance terms. The burn rate increases by an order of magnitude after peak compression, and the hot-spot conditions show clear evidence for burn propagation into the dense fuel surrounding the hot spot. These novel dynamics and thermodynamic properties have never been observed on prior inertial fusion experiments.

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1959535

Report Number(s):: LLNL-JRNL-835348; 1054325; TRN: US2312881

Journal Information:: Physical Review. E, Vol. 106, Issue 2; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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