Fuel–ablator mix has been established as a major performance degrading effect in the burning plasma regime of recent inertial confinement fusion (ICF) experiments. As such, the study of fuel–ablator mix with experiments and simulations can provide valuable insight for our understanding of these experiments and establish a path for even higher yields and increased robustness. We present a novel high-yield experimental ICF design that is motivated by recent experiments measuring ice–ablator mix with a CH ablator instead of a high-density carbon (HDC) ablator [B. Bachmann et al., Phys. Rev. Lett. 129, 275001 (2022)]. We review these experiments in more detail and describe the modeling assumptions and parameters used to obtain agreement with the data from implosion and burn simulations with mix. Using this mix model calibrated a posteriori to the experimental data, we design an implosion that uses a CH ablator that is predicted to achieve better performance than a recent experiment that achieved net target gain of 1.5 in HDC. Because hydrodynamic instabilities are greatly reduced with this new design, we also expect a high reproducibility at the same implosion adiabat as current record yield experiments.
Measuring and simulating ice–ablator mix in inertial confinement fusion
Present address: Focused Energy Inc., 11525-B Stonehollow Drive, Suite 200, Austin, Texas 78758, USA.
Note: This paper is part of the Special Collection: Papers from the 64th Annual Meeting of the APS Division of Plasma Physics.
Note: Paper GI1 1, Bull. Am. Phys. Soc. 67 (2022).
B. Bachmann, S. A. MacLaren, L. Masse, S. Bhandarkar, T. Briggs, D. Casey, L. Divol, T. Döppner, D. Fittinghoff, M. Freeman, S. Haan, G. N. Hall, B. Hammel, E. Hartouni, N. Izumi, V. Geppert-Kleinrath, S. Khan, B. Kozioziemski, C. Krauland, O. Landen, D. Mariscal, E. Marley, K. Meaney, G. Mellos, A. Moore, A. Pak, P. Patel, M. Ratledge, N. Rice, M. Rubery, J. Salmonson, J. Sater, D. Schlossberg, M. Schneider, V. A. Smalyuk, C. Trosseille, P. Volegov, C. Weber, G. J. Williams, A. Wray; Measuring and simulating ice–ablator mix in inertial confinement fusion. Phys. Plasmas 1 May 2023; 30 (5): 052704. https://doi.org/10.1063/5.0146974
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