Variable convergence liquid layer implosions on the National Ignition Facility

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

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

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)]. 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. This may be due to suppressed hot-spot formation or an anomalous energy loss mechanism.

Original languageEnglish (US)
Article number056304
JournalPhysics of Plasmas
Volume25
Issue number5
DOIs
StatePublished - May 1 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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