Mix and hydrodynamic instabilities on NIF

V. A. Smalyuk, H. F. Robey, D. T. Casey, D. S. Clark, T. Döppner, S. W. Haan, B. A. Hammel, A. G. MacPhee, D. Martinez, J. L. Milovich, J. L. Peterson, L. Pickworth, J. E. Pino, K. Raman, R. Tipton, C. R. Weber, K. L. Baker, B. Bachmann, L. F.Berzak Hopkins, E. BondJ. A. Caggiano, D. A. Callahan, P. M. Celliers, C. Cerjan, S. N. Dixit, M. J. Edwards, S. Felker, J. E. Field, D. N. Fittinghoff, N. Gharibyan, G. P. Grim, A. V. Hamza, R. Hatarik, M. Hohenberger, W. W. Hsing, O. A. Hurricane, K. S. Jancaitis, O. S. Jones, S. Khan, J. J. Kroll, K. N. Lafortune, O. L. Landen, T. Ma, B. J. Macgowan, L. Masse, A. S. Moore, S. R. Nagel, A. Nikroo, A. Pak, P. K. Patel, B. A. Remington, D. B. Sayre, B. K. Spears, M. Stadermann, R. Tommasini, C. C. Widmayer, C. B. Yeamans, J. Crippen, M. Farrell, E. Giraldez, N. Rice, C. H. Wilde, P. L. Volegov, M. Gatu Johnson

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Several new platforms have been developed to experimentally measure hydrodynamic instabilities in all phases of indirect-drive, inertial confinement fusion implosions on National Ignition Facility. At the ablation front, instability growth of pre-imposed modulations was measured with a face-on, x-ray radiography platform in the linear regime using the Hydrodynamic Growth Radiography (HGR) platform. Modulation growth of «native roughness» modulations and engineering features (fill tubes and capsule support membranes) were measured in conditions relevant to layered DT implosions. A new experimental platform was developed to measure instability growth at the ablator-ice interface. In the deceleration phase of implosions, several experimental platforms were developed to measure both low-mode asymmetries and high-mode perturbations near peak compression with x-ray and nuclear techniques. In one innovative technique, the self-emission from the hot spot was enhanced with argon dopant to «self-backlight» the shell in-flight. To stabilize instability growth, new «adiabat-shaping» techniques were developed using the HGR platform and applied in layered DT implosions.

Original languageEnglish (US)
Article numberC06001
JournalJournal of Instrumentation
Volume12
Issue number6
DOIs
StatePublished - Jun 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Mathematical Physics

Keywords

  • Nuclear instruments and methods for hot plasma diagnostics
  • Plasma diagnostics-high speed photography

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