Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility

J. S. Ross, D. P. Higginson, D. Ryutov, F. Fiuza, R. Hatarik, C. M. Huntington, D. H. Kalantar, A. Link, B. B. Pollock, B. A. Remington, H. G. Rinderknecht, G. F. Swadling, D. P. Turnbull, S. Weber, S. Wilks, D. H. Froula, M. J. Rosenberg, T. Morita, Y. Sakawa, H. TakabeR. P. Drake, C. Kuranz, G. Gregori, J. Meinecke, M. C. Levy, M. Koenig, A. Spitkovsky, R. D. Petrasso, C. K. Li, H. Sio, B. Lahmann, A. B. Zylstra, H. S. Park

Research output: Contribution to journalArticle

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Abstract

A study of the transition from collisional to collisionless plasma flows has been carried out at the National Ignition Facility using high Mach number (M>4) counterstreaming plasmas. In these experiments, CD-CD and CD-CH planar foils separated by 6-10 mm are irradiated with laser energies of 250 kJ per foil, generating ∼1000 km/s plasma flows. Varying the foil separation distance scales the ion density and average bulk velocity and, therefore, the ion-ion Coulomb mean free path, at the interaction region at the midplane. The characteristics of the flow interaction have been inferred from the neutrons and protons generated by deuteron-deuteron interactions and by x-ray emission from the hot, interpenetrating, and interacting plasmas. A localized burst of neutrons and bright x-ray emission near the midpoint of the counterstreaming flows was observed, suggesting strong heating and the initial stages of shock formation. As the separation of the CD-CH foils increases we observe enhanced neutron production compared to particle-in-cell simulations that include Coulomb collisions, but do not include collective collisionless plasma instabilities. The observed plasma heating and enhanced neutron production is consistent with the initial stages of collisionless shock formation, mediated by the Weibel filamentation instability.

Original languageEnglish
Article number185003
JournalPhysical Review Letters
Volume118
Issue number18
DOIs
Publication statusPublished - May 5 2017

Fingerprint

magnetohydrodynamic flow
ignition
foils
neutrons
collisionless plasmas
deuterons
shock
Weibel instability
methylidyne
Coulomb collisions
plasma heating
magnetohydrodynamic stability
interactions
high temperature plasmas
Mach number
mean free path
bursts
ions
x rays
heating

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ross, J. S., Higginson, D. P., Ryutov, D., Fiuza, F., Hatarik, R., Huntington, C. M., ... Park, H. S. (2017). Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility. Physical Review Letters, 118(18), [185003]. https://doi.org/10.1103/PhysRevLett.118.185003

Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility. / Ross, J. S.; Higginson, D. P.; Ryutov, D.; Fiuza, F.; Hatarik, R.; Huntington, C. M.; Kalantar, D. H.; Link, A.; Pollock, B. B.; Remington, B. A.; Rinderknecht, H. G.; Swadling, G. F.; Turnbull, D. P.; Weber, S.; Wilks, S.; Froula, D. H.; Rosenberg, M. J.; Morita, T.; Sakawa, Y.; Takabe, H.; Drake, R. P.; Kuranz, C.; Gregori, G.; Meinecke, J.; Levy, M. C.; Koenig, M.; Spitkovsky, A.; Petrasso, R. D.; Li, C. K.; Sio, H.; Lahmann, B.; Zylstra, A. B.; Park, H. S.

In: Physical Review Letters, Vol. 118, No. 18, 185003, 05.05.2017.

Research output: Contribution to journalArticle

Ross, JS, Higginson, DP, Ryutov, D, Fiuza, F, Hatarik, R, Huntington, CM, Kalantar, DH, Link, A, Pollock, BB, Remington, BA, Rinderknecht, HG, Swadling, GF, Turnbull, DP, Weber, S, Wilks, S, Froula, DH, Rosenberg, MJ, Morita, T, Sakawa, Y, Takabe, H, Drake, RP, Kuranz, C, Gregori, G, Meinecke, J, Levy, MC, Koenig, M, Spitkovsky, A, Petrasso, RD, Li, CK, Sio, H, Lahmann, B, Zylstra, AB & Park, HS 2017, 'Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility', Physical Review Letters, vol. 118, no. 18, 185003. https://doi.org/10.1103/PhysRevLett.118.185003
Ross, J. S. ; Higginson, D. P. ; Ryutov, D. ; Fiuza, F. ; Hatarik, R. ; Huntington, C. M. ; Kalantar, D. H. ; Link, A. ; Pollock, B. B. ; Remington, B. A. ; Rinderknecht, H. G. ; Swadling, G. F. ; Turnbull, D. P. ; Weber, S. ; Wilks, S. ; Froula, D. H. ; Rosenberg, M. J. ; Morita, T. ; Sakawa, Y. ; Takabe, H. ; Drake, R. P. ; Kuranz, C. ; Gregori, G. ; Meinecke, J. ; Levy, M. C. ; Koenig, M. ; Spitkovsky, A. ; Petrasso, R. D. ; Li, C. K. ; Sio, H. ; Lahmann, B. ; Zylstra, A. B. ; Park, H. S. / Transition from Collisional to Collisionless Regimes in Interpenetrating Plasma Flows on the National Ignition Facility. In: Physical Review Letters. 2017 ; Vol. 118, No. 18.
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abstract = "A study of the transition from collisional to collisionless plasma flows has been carried out at the National Ignition Facility using high Mach number (M>4) counterstreaming plasmas. In these experiments, CD-CD and CD-CH planar foils separated by 6-10 mm are irradiated with laser energies of 250 kJ per foil, generating ∼1000 km/s plasma flows. Varying the foil separation distance scales the ion density and average bulk velocity and, therefore, the ion-ion Coulomb mean free path, at the interaction region at the midplane. The characteristics of the flow interaction have been inferred from the neutrons and protons generated by deuteron-deuteron interactions and by x-ray emission from the hot, interpenetrating, and interacting plasmas. A localized burst of neutrons and bright x-ray emission near the midpoint of the counterstreaming flows was observed, suggesting strong heating and the initial stages of shock formation. As the separation of the CD-CH foils increases we observe enhanced neutron production compared to particle-in-cell simulations that include Coulomb collisions, but do not include collective collisionless plasma instabilities. The observed plasma heating and enhanced neutron production is consistent with the initial stages of collisionless shock formation, mediated by the Weibel filamentation instability.",
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AU - Ross, J. S.

AU - Higginson, D. P.

AU - Ryutov, D.

AU - Fiuza, F.

AU - Hatarik, R.

AU - Huntington, C. M.

AU - Kalantar, D. H.

AU - Link, A.

AU - Pollock, B. B.

AU - Remington, B. A.

AU - Rinderknecht, H. G.

AU - Swadling, G. F.

AU - Turnbull, D. P.

AU - Weber, S.

AU - Wilks, S.

AU - Froula, D. H.

AU - Rosenberg, M. J.

AU - Morita, T.

AU - Sakawa, Y.

AU - Takabe, H.

AU - Drake, R. P.

AU - Kuranz, C.

AU - Gregori, G.

AU - Meinecke, J.

AU - Levy, M. C.

AU - Koenig, M.

AU - Spitkovsky, A.

AU - Petrasso, R. D.

AU - Li, C. K.

AU - Sio, H.

AU - Lahmann, B.

AU - Zylstra, A. B.

AU - Park, H. S.

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