Variable convergence liquid layer implosions on the National Ignition Facility

Zylstra, A. B.; Yi, S. A.; Haines, B. M.; Olson, R. E.; Leeper, R. J.; Braun, T.; Biener, J.; Kline, J. L.; Batha, S. H.; Berzak Hopkins, L.; Bhandarkar, S.; Bradley, P. A.; Crippen, J.; Farrell, M.; Fittinghoff, D.; Herrmann, H. W.; Huang, H.; Khan, S.; Kong, C.; Kozioziemski, B. J.; Kyrala, G. A.; Ma, T.; Meezan, N. B.; Merrill, F.; Nikroo, A.; Peterson, R. R.; Rice, N.; Sater, J. D.; Shah, R. C.; Stadermann, M.; Volegov, P.; Walters, C.; Wilson, D. C.

doi:10.1063/1.5016349

Title: Variable convergence liquid layer implosions on the National Ignition Facility

Journal Article · 19 March 2018 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5016349 · OSTI ID:1435526

^[1]; Yi, S. A. ^[1];

^[1]; Olson, R. E. ^[1];

^[1]; Braun, T. ^[2]; Biener, J. ^[2]; Kline, J. L. ^[1]; Batha, S. H. ^[1];

^[2]; Bhandarkar, S. ^[2];

^[1];

^[3];

^[3]; Fittinghoff, D. ^[2]; Herrmann, H. W. ^[1]; Huang, H. ^[3]; Khan, S. ^[2]; Kong, C. ^[3]; Kozioziemski, B. J. ^[2] more »

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)

Liquid layer implosions using the “wetted foam” technique, where the liquid fuel is wicked into a supporting foam, have been recently conducted on the National Ignition Facility for the first time [Olson et al., Phys. Rev. Lett. 117, 245001 (2016)]. In this paper, we report on a series of wetted foam implosions where the convergence ratio was varied between 12 and 20. Reduced nuclear performance is observed as convergence ratio increases. 2-D radiation-hydrodynamics simulations accurately capture the performance at convergence ratios (CR) ~ 12, but we observe a significant discrepancy at CR ~ 20. Finally, this may be due to suppressed hot-spot formation or an anomalous energy loss mechanism.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

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

Grant/Contract Number:: AC52-06NA25396; AC52-07NA27344; NA0001808

OSTI ID:: 1435526

Alternate ID(s):: OSTI ID: 1426844

Report Number(s):: LA-UR-17-29966; TRN: US1900065

Journal Information:: Physics of Plasmas, Vol. 25, Issue 5; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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