POP: INERTIALLY CONFINED PLASMAS, HIGH ENERGY DENSITY PLASMA SCIENCE, WARM DENSE MATTER http://scitation.aip.org/ POP: INERTIALLY CONFINED PLASMAS, HIGH ENERGY DENSITY PLASMA SCIENCE, WARM DENSE MATTER Relativistic critical density increase and relaxation and high-power pulse propagation http://link.aip.org/link/?PHP/19/022705/1&agg=rss S. M. Weng, P. Mulser, and Z. M. Sheng<br/> High-power laser pulse propagation in an overdense plasma due to the relativistic critical density increase has been investigated in one dimension. In a first step the conditions for the existence of a relativistic critical density are delimited and supported by particle-in-cell simulations. Its acc ... [Phys. Plasmas 19, 022705 (2012)] published Thu Feb 9, 2012. Channeling dynamics of relativistic-intensity laser pulses http://link.aip.org/link/?PHP/19/022704/1&agg=rss A. Friou, E. Lefebvre, and L. Gremillet<br/> Two-dimensional particle-in-cell simulations were performed to study the channeling in long (>500[mu]m) underdense plasmas of long duration (>10 ps), relativistic-intensity (I=10 W/cm) laser pulses. We describe five different types of channeling behaviors, and the corresponding ranges of plasmas and ... [Phys. Plasmas 19, 022704 (2012)] published Wed Feb 8, 2012. Effects of magnetic shear on magneto-Rayleigh-Taylor instability http://link.aip.org/link/?PHP/19/022703/1&agg=rss Peng Zhang, Y. Y. Lau, I. M. Rittersdorf, M. R. Weis, R. M. Gilgenbach et al.<br/> The magnetized liner inertial fusion concept [S. A. Slutz et al., Phys. Plasmas 17, 056303 (2010)] consists of a cylindrical metal liner enclosing a preheated plasma that is embedded in an axial magnetic field. Because of its diffusion into the liner, the pulsed azimuthal magnetic field may exhibit ... [Phys. Plasmas 19, 022703 (2012)] published Tue Feb 7, 2012. X-pinch radiography for the radiation suppressed tungsten and aluminum planar wire array http://link.aip.org/link/?PHP/19/022702/1&agg=rss J. Wu, L. P. Wang, J. J. Han, M. Li, L. Sheng et al.<br/> X-pinch radiography experiments were carried out on the 1 MA QiangGuang-1 facility to investigate the wire core behaviors of the tungsten and aluminum planar wire array. An axial quencher and over-massed loads were used to suppress keV radiation from the planar wire array. Two-wire 30 [mu]m Mo and/o ... [Phys. Plasmas 19, 022702 (2012)] published Fri Feb 3, 2012. Magnetohydrodynamic instabilities in radial foil configurations http://link.aip.org/link/?PHP/19/022701/1&agg=rss P.-A. Gourdain, J. B. Greenly, D. A. Hammer, B. R. Kusse, S. A. Pikuz et al.<br/> While detrimental to plasma performance, magnetohydrodynamic plasma instabilities in radial foil configurations do not preclude intense x-ray radiations from the central plasma column. As most of the plasma current flows there, the column pinches generating x-rays. However, pinch comes with a kink i ... [Phys. Plasmas 19, 022701 (2012)] published Wed Feb 1, 2012. Exact self-similar solutions for the magnetized Noh Z pinch problem http://link.aip.org/link/?PHP/19/012707/1&agg=rss A. L. Velikovich, J. L. Giuliani, S. T. Zalesak, J. W. Thornhill, and T. A. Gardiner<br/> A self-similar solution is derived for a radially imploding cylindrical plasma with an embedded, azimuthal magnetic field. The plasma stagnates through a strong, outward propagating shock wave of constant velocity. This analysis is an extension of the classic Noh gasdynamics problem to its ideal mag ... [Phys. Plasmas 19, 012707 (2012)] published Thu Jan 26, 2012. Density gradient effects in weakly nonlinear ablative Rayleigh-Taylor instability http://link.aip.org/link/?PHP/19/012706/1&agg=rss L. F. Wang<!--orlang--> (&#x738B;&#x7ACB;&#x950B;)<!--orlang-->, W. H. Ye<!--orlang--> (&#x53F6;&#x6587;&#x534E;)<!--orlang-->, and X. T. He<!--orlang--> (&#x8D3A;&#x8D24;&#x571F;)<!--orlang--><br/> In this research, density gradient effects (i.e., finite thickness of ablation front effects) in ablative Rayleigh-Taylor instability (ARTI), in the presence of preheating within the weakly nonlinear regime, are investigated numerically. We analyze the weak, medium, and strong ablation surfaces whic ... [Phys. Plasmas 19, 012706 (2012)] published Thu Jan 26, 2012. Experimental investigation of the stimulated Brillouin scattering growth and saturation at 526 and 351 nm for direct drive and shock ignition http://link.aip.org/link/?PHP/19/012705/1&agg=rss S. Depierreux, P. Loiseau, D. T. Michel, V. Tassin, C. Stenz et al.<br/> We have designed experiments to study the effect of the laser wavelength (0.527 versus 0.351 [mu]m) on the coupling efficiency in plasma conditions relevant to compression and shock ignition (SI) schemes in different intensity regimes. A difficult issue was to produce interaction conditions that are ... [Phys. Plasmas 19, 012705 (2012)] published Tue Jan 24, 2012. Fast-electron generation in long-scale-length plasmas http://link.aip.org/link/?PHP/19/012704/1&agg=rss B. Yaakobi, P.-Y. Chang, A. Solodov, C. Stoeckl, D. H. Edgell et al.<br/> Long-scale-length (~400-[mu]m) planar CH plasmas have been generated on OMEGA EP with laser intensities of the order of 10 W/cm and ~1-mm focal spots to quantify the number and temperature of fast electrons caused by the two-plasmon-decay instability. The main diagnostics were the time-integrated K ... [Phys. Plasmas 19, 012704 (2012)] published Tue Jan 17, 2012. An initial assessment of three-dimensional polar direct drive capsule asymmetries for implosions at the National Ignition Facility http://link.aip.org/link/?PHP/19/012702/1&agg=rss Natalia S. Krasheninnikova, Sean M. Finnegan, and Mark J. Schmitt<br/> The National Ignition Facility (NIF) provides a unique opportunity to study implosion physics with nuclear yield. The use of polar direct drive (PDD) [A. M. Cok, R. S. Craxton, and P. W. McKenty, Phys. Plasmas 15, 082705 (2008)] provides a simple platform for the experimental studies without expensi ... [Phys. Plasmas 19, 012702 (2012)] published Wed Jan 11, 2012. Modelling of the internal dynamics and density in a tens of joules plasma focus device http://link.aip.org/link/?PHP/19/012703/1&agg=rss Ariel Marquez, Jose Gonzalez, Ariel Tarifeno-Saldivia, Cristian Pavez, Leopoldo Soto et al.<br/> Using MHD theory, coupled differential equations were generated using a lumped parameter model to describe the internal behaviour of the pinch compression phase in plasma focus discharges. In order to provide these equations with appropriate initial conditions, the modelling of previous phases was i ... [Phys. Plasmas 19, 012703 (2012)] published Wed Jan 11, 2012. Time evolution of filamentation and self-generated fields in the coronae of directly driven inertial-confinement fusion capsules http://link.aip.org/link/?PHP/19/012701/1&agg=rss F. H. Seguin, C. K. Li, M. J.-E. Manuel, H. G. Rinderknecht, N. Sinenian et al.<br/> Time-gated radiography with monoenergetic 15-MeV protons, 3-MeV protons, and 4-MeV alpha particles has revealed a rich and complex evolution of electromagnetic field structures in and around imploding, directly driven inertial-confinement fusion (ICF) targets at the OMEGA laser facility. Plastic-she ... [Phys. Plasmas 19, 012701 (2012)] published Mon Jan 9, 2012. High-current discharge channel contraction in high density gas http://link.aip.org/link/?PHP/18/122702/1&agg=rss Ph. G. Rutberg, A. A. Bogomaz, M. E. Pinchuk, A. V. Budin, A. G. Leks et al.<br/> Research results for discharges at current amplitudes of 0.51.6 MA and current rise rate of ~10 A/s are presented. The discharge is performed in the hydrogen environment at the initial pressure of 535 MPa. Initiation is implemented by a wire explosion. The time length of the first half-period of the ... [Phys. Plasmas 18, 122702 (2011)] published Wed Dec 14, 2011. Parallel and perpendicular velocity sheared flows driven tripolar vortices in an inhomogeneous electron-ion quantum magnetoplasma http://link.aip.org/link/?PHP/18/122701/1&agg=rss Arshad M. Mirza and W. Masood<br/> Nonlinear equations governing the dynamics of finite amplitude drift-ion acoustic-waves are derived by taking into account sheared ion flows parallel and perpendicular to the ambient magnetic field in a quantum magnetoplasma comprised of electrons and ions. It is shown that stationary solution of th ... [Phys. Plasmas 18, 122701 (2011)] published Tue Dec 13, 2011. Orbital ferromagnetism and quantum collapse in stellar plasmas http://link.aip.org/link/?PHP/18/112708/1&agg=rss M. Akbari-Moghanjoughi<br/> The possibility of quantum collapse and characteristics of nonlinear localized excitations are examined in dense stars with Landau orbital ferromagnetism in the framework of conventional quantum magnetohydrodynamics model including Bohm force and spin-orbit polarization effects. Employing the concep ... [Phys. Plasmas 18, 112708 (2011)] published Fri Nov 18, 2011. Atomic mix in directly driven inertial confinement implosions http://link.aip.org/link/?PHP/18/112707/1&agg=rss D. C. Wilson, P. S. Ebey, T. C. Sangster, W. T. Shmayda, V. Yu. Glebov et al.<br/> Directly driven implosions on the Omega laser [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] have measured the presence of atomic mix using D+T neutron yield rates from plastic capsules with and without deuterated layers, and a nearly pure tritium fuel containing 0.7% deuterium. In 15, 19, and ... [Phys. Plasmas 18, 112707 (2011)] published Wed Nov 16, 2011. Wire number dependence of the implosion dynamics, stagnation, and radiation output of tungsten wire arrays at Z driver http://link.aip.org/link/?PHP/18/112706/1&agg=rss Michael G. Mazarakis, Christopher E. Deeney, William A. Stygar, Melissa R. Douglas, Jerry Chittenden et al.<br/> We report results of the experimental campaign, which studied the initiation, implosion dynamics, and radiation yield of tungsten wire arrays as a function of the wire number. The wire array dimensions and mass were those of interest for the Z-pinch driven Inertial Confinement Fusion (ICF) program. ... [Phys. Plasmas 18, 112706 (2011)] published Mon Nov 14, 2011. Nonlinear wake potential and stopping power for charged particles interacting with a one-dimensional electron gas http://link.aip.org/link/?PHP/18/112705/1&agg=rss Ya Zhang, Yuan-Hong Song, and You-Nian Wang<br/> We examine the interaction of particles with a one-dimensional electron gas by employing the quantum hydrodynamic (QHD) theory, where the nonlinear wake potential and stopping power have been numerically calculated by solving the nonlinear QHD equations with flux corrected transport (FCT) numerical ... [Phys. Plasmas 18, 112705 (2011)] published Fri Nov 11, 2011. Equation of state of partially ionized argon plasma http://link.aip.org/link/?PHP/18/112704/1&agg=rss Q. F. Chen, J. Zheng, Y. J. Gu, Y. L. Chen, and L. C. Cai<br/> The ionization degree, Hugoniots, and equation of state of partially ionized argon plasma were calculated by using self-consistent fluid variational theory for temperature of 650 kK and density of 0.054.0 g/cm. The corrections of lowering of ionization energy of fluid argon caused by the interaction ... [Phys. Plasmas 18, 112704 (2011)] published Thu Nov 10, 2011. Design of experiments to observe radiation stabilized Rayleigh-Taylor instability growth at an embedded decelerating interface http://link.aip.org/link/?PHP/18/112703/1&agg=rss C. M. Huntington, C. C. Kuranz, R. P. Drake, A. R. Miles, S. T. Prisbrey et al.<br/> Using a hohlraum produced thermal x-ray drive at the National Ignition Facility (NIF) to create pressure by material ablation, a shock exceeding 200 Mbar can be driven through a planar, solid-density target and into a lower-density foam material. The shock driven through the foam is strongly radiati ... [Phys. Plasmas 18, 112703 (2011)] published Thu Nov 10, 2011. Using time-integrated K images to study refluxing and the extent of pre-plasmas in intense laser-plasma experiment http://link.aip.org/link/?PHP/18/112702/1&agg=rss V. M. Ovchinnikov, D. W. Schumacher, G. E. Kemp, A. G. Krygier, L. D. Van Woerkom et al.<br/> We report the results of an experimental and numerical modeling study of the formation of time-integrated K images by electrons excited during an intense laser-plasma interaction. We report the use of the spatial structure of time-integrated K images to quantitatively characterize the pre-plasma pro ... [Phys. Plasmas 18, 112702 (2011)] published Wed Nov 9, 2011.