Physics of Plasmas: All Topics http://scitation.aip.org/ Physics of Plasmas: All Topics Drift-resistive-inertial ballooning modes in quasihelical stellarators http://link.aip.org/link/?PHP/17/022502/1&agg=rss T. Rafiq, C. C. Hegna, J. D. Callen, and A. H. Kritz<br/> A linear stability theory of nonideal magnetohydrodynamic (MHD) ballooning modes is investigated using a two fluid model for electron-ion plasmas. Drift-resistive-inertial ballooning mode eigenvalues and eigenfunctions are calculated for a variety of equilibria including axisymmetric shifted circula ... [Phys. Plasmas 17, 022502 (2010)] published Tue Feb 9, 2010. Intermittent convective transport carried by propagating electromagnetic filamentary structures in nonuniformly magnetized plasma http://link.aip.org/link/?PHP/17/022501/1&agg=rss G. S. Xu, V. Naulin, W. Fundamenski, J. Juul Rasmussen, A. H. Nielsen et al.<br/> Drift-Alfven vortex filaments associated with electromagnetic turbulence were recently identified in reversed field pinch devices. Similar propagating filamentary structures were observed in the Earth magnetosheath, magnetospheric cusp and Saturn's magnetosheath by spacecrafts. The characteristics o ... [Phys. Plasmas 17, 022501 (2010)] published Tue Feb 9, 2010. Alfven continuum deformation by kinetic geodesic effect in rotating tokamak plasmas http://link.aip.org/link/?PHP/17/022102/1&agg=rss A. G. Elfimov<br/> Using a quasitoroidal set of coordinates with coaxial circular magnetic surfaces, Vlasov equation is solved for collisionless plasmas in drift approach and a perpendicular dielectric tensor is found for large aspect ratio tokamaks in a low frequency band. Taking into account plasma rotation and char ... [Phys. Plasmas 17, 022102 (2010)] published Tue Feb 9, 2010. Nonlinear whistler instability driven by a beamlike distribution of resonant electrons http://link.aip.org/link/?PHP/17/022902/1&agg=rss Martin Lampe, Glenn Joyce, Wallace M. Manheimer, and Gurudas Ganguli<br/> Theory and simulation are used to study the instability of a coherent whistler parallel-propagating in a simplified model radiation belt with a background of cold electrons, as well as a ring distribution of energetic electrons. A nonlinear instability is initiated at the location z, where the elect ... [Phys. Plasmas 17, 022902 (2010)] published Fri Feb 5, 2010. Internal electron transport barrier due to neoclassical ambipolarity in the Helically Symmetric Experiment http://link.aip.org/link/?PHP/17/056101/1&agg=rss J. Lore, W. Guttenfelder, A. Briesemeister, D. T. Anderson, F. S. B. Anderson et al.<br/> Electron cyclotron heated plasmas in the Helically Symmetric Experiment (HSX) feature strongly peaked electron temperature profiles; central temperatures are 2.5 keV with 100 kW injected power. These measurements, coupled with neoclassical predictions of large electron root radial electric fields wi ... [Phys. Plasmas 17, 056101 (2010)] published Thu Feb 4, 2010. Whistler wave excitation and effects of self-focusing on ion beam propagation through a background plasma along a solenoidal magnetic field http://link.aip.org/link/?PHP/17/023103/1&agg=rss Mikhail A. Dorf, Igor D. Kaganovich, Edward A. Startsev, and Ronald C. Davidson<br/> This paper extends studies of ion beam transport through a background plasma along a solenoidal magnetic field by Kaganovich et al. [Phys. Plasmas 15, 103108 (2008)] to the important regime of moderate magnetic field strength satisfying omega>2betaomega. Here, omega and omega are the electron cyclot ... [Phys. Plasmas 17, 023103 (2010)] published Wed Feb 3, 2010. Coaxial discharge with axial magnetic field: Demonstration that the Boltzmann relation for electrons generally does not hold in magnetized plasmas http://link.aip.org/link/?PHP/17/022301/1&agg=rss T. M. G. Zimmermann, M. Coppins, and J. E. Allen<br/> A one-dimensional two-fluid model is used to describe the quasineutral plasma of a discharge formed between coaxial cylinders under the influence of an axial magnetic field. The geometry treated in this paper is symmetric about the z-axis and is radially varying. The nested cylinders are necessarily ... [Phys. Plasmas 17, 022301 (2010)] published Wed Feb 3, 2010. Electron velocity shear driven instability in relativistic regime http://link.aip.org/link/?PHP/17/022101/1&agg=rss Sita Sundar and Amita Das<br/> The electron magnetohydrodynamics model has been generalized to incorporate relativistic effects. The model is then employed to study the instability associated with sheared electron velocity flow in the relativistic regime. The instability has features similar to the conventional velocity shear dri ... [Phys. Plasmas 17, 022101 (2010)] published Wed Feb 3, 2010. Nonthermal effects on existence domains for dust-acoustic solitary structures in plasmas with two-temperature ions http://link.aip.org/link/?PHP/17/023701/1&agg=rss Frank Verheest and Manfred A. Hellberg<br/> Large dust-acoustic waves are investigated in a multispecies plasma model consisting of adiabatic, negatively charged dust, in the presence of two ion species, a cooler one with a Boltzmann distribution and a hotter one with a nonthermal Cairns distribution. This is treated through a Sagdeev pseudop ... [Phys. Plasmas 17, 023701 (2010)] published Tue Feb 2, 2010. Lateral propagation of MeV electrons generated by femtosecond laser irradiation http://link.aip.org/link/?PHP/17/023102/1&agg=rss J. F. Seely, C. I. Szabo, P. Audebert, E. Brambrink, E. Tabakhoff et al.<br/> The propagation of MeV electrons generated by intense ([approximate]10 W/cm) femtosecond laser irradiation, in the lateral direction perpendicular to the incident laser beam, was studied using targets consisting of irradiated metal wires and neighboring spectator wires embedded in electrically cond ... [Phys. Plasmas 17, 023102 (2010)] published Tue Feb 2, 2010. Propagation of ultrashort laser pulses in optically ionized gases http://link.aip.org/link/?PHP/17/023101/1&agg=rss A. Morozov, Y. Luo, S. Suckewer, D. F. Gordon, and P. Sprangle<br/> Propagation of 800 nm, 120 fs laser pulses with intensities of 4 x 10 W/cm in supersonic gas jets of N and H is studied using a shear-type interferometer. The plasma density distribution resulting from photoionization is resolved in space and time with simultaneously measured initial neutral densit ... [Phys. Plasmas 17, 023101 (2010)] published Mon Feb 1, 2010. Energy transfer and magnetic field generation via ion-beam driven instabilities in an electron-ion plasma http://link.aip.org/link/?PHP/17/022901/1&agg=rss Jaehong Park, Chuang Ren, Eric G. Blackman, and Xianglong Kong<br/> Whether an efficient collisionless temperature equilibration mechanism exists for a two-temperature ion-electron plasma, with T>T, is important for understanding astrophysical phenomena such as two-temperature accretion flows and collisionless shocks in supernova remnants or gamma-ray bursts. In thi ... [Phys. Plasmas 17, 022901 (2010)] published Mon Feb 1, 2010. Erratum: Time-resolved measurements of double layer evolution in expanding plasma [Phys. Plasmas 17, 055701 (2010)] http://link.aip.org/link/?PHP/17/059901/1&agg=rss E. E. Scime, I. A. Biloiu, J. Carr, Jr., S. Chakraborty Thakur, M. Galante et al.<br/> Abstract not available. [Phys. Plasmas 17, 059901 (2010)] published Thu Jan 28, 2010. Wave propagation downstream of a high power helicon in a dipolelike magnetic field http://link.aip.org/link/?PHP/17/013504/1&agg=rss James Prager, Timothy Ziemba, Robert Winglee, and B. Race Roberson<br/> The wave propagating downstream of a high power helicon source in a diverging magnetic field was investigated experimentally. The magnetic field of the wave has been measured both axially and radially. The three-dimensional structure of the propagating wave is observed and its wavelength and phase v ... [Phys. Plasmas 17, 013504 (2010)] published Thu Jan 28, 2010. Improving proton acceleration with circularly polarized intense laser pulse by radial confinement with heavy ions http://link.aip.org/link/?PHP/17/013106/1&agg=rss L. G. Huang, A. L. Lei, J. H. Bin, Y. Bai, Wei Yu et al.<br/> Energetic proton acceleration from interaction of intense short circularly polarized laser pulse with a sandwich target is investigated using two-dimensional particle-in-cell simulation. The sandwich target consists of a hydrogen-plasma layer surrounded by carbon-plasma layers. It is found that the ... [Phys. Plasmas 17, 013106 (2010)] published Thu Jan 28, 2010. Transition to chaos in a driven dusty plasma http://link.aip.org/link/?PHP/17/013703/1&agg=rss T. E. Sheridan and W. L. Theisen<br/> Dynamical chaos has previously been observed experimentally in a driven dusty plasma with three particles [T. E. Sheridan, Phys. Plasmas 12, 080701 (2005)]. In the present work, the transition to chaos in this system is studied as a function of the amplitude of a periodic driving force for two diffe ... [Phys. Plasmas 17, 013703 (2010)] published Thu Jan 28, 2010. Direct-current-like phase space manipulation using chirped alternating current fields http://link.aip.org/link/?PHP/17/013105/1&agg=rss P. F. Schmit and N. J. Fisch<br/> Waves in plasmas can accelerate particles that are resonant with the wave. A dc electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. Whereas wave-particle acceleration mechanisms have been widely discussed in ... [Phys. Plasmas 17, 013105 (2010)] published Thu Jan 28, 2010. Beta-induced Alfven-acoustic eigenmodes in stellarator plasmas with low shear http://link.aip.org/link/?PHP/17/012108/1&agg=rss D. Yu. Eremin and A. Konies<br/> The coupling of low-frequency Alfvenic modes with acoustic oscillations due to curvature of the background magnetic field is considered for stellarator plasmas with low shear. Magnetohydrodynamic (MHD) analysis demonstrates that the interaction between these branches can generate gaps in the continu ... [Phys. Plasmas 17, 012108 (2010)] published Tue Jan 26, 2010. Effect of magnetic field on temporal development of RayleighTaylor instability induced interfacial nonlinear structure http://link.aip.org/link/?PHP/17/012306/1&agg=rss M. R. Gupta, Labakanta Mandal, Sourav Roy, and Manoranjan Khan<br/> The effect of magnetic field on the nonlinear growth rate of RayleighTaylor instability induced two fluid interfacial structures has been investigated. The magnetic field is assumed to be parallel to the plane of the two fluid interface and acts in a direction perpendicular to the wave vector. If th ... [Phys. Plasmas 17, 012306 (2010)] published Tue Jan 26, 2010. Electromagnetic effects on trace impurity transport in tokamak plasmas http://link.aip.org/link/?PHP/17/012307/1&agg=rss T. Hein and C. Angioni<br/> The impact of electromagnetic effects on the transport of light and heavy impurities in tokamak plasmas is investigated by means of an extensive set of linear gyrokinetic numerical calculations with the code GYRO [J. Candy and R. E. Waltz, J. Comput. Phys. 186, 545 (2003)] and of analytical derivati ... [Phys. Plasmas 17, 012307 (2010)] published Tue Jan 26, 2010. Coupling of Alfven and sound waves in stellarator plasmas http://link.aip.org/link/?PHP/17/012107/1&agg=rss Axel Konies and Denis Eremin<br/> Recently, a low frequency mode possibly driven unstable by hot electrons [J. M. Canik et al., 21st IAEA Fusion Energy Conference, Chengdu (China) (IAEA, Vienna, 2006), CN-149EX/5-2] has been observed in the Helically Symmetric Experiment [F. S. B. Anderson et al., Fusion Technol. 27, 273 (1995)]. Th ... [Phys. Plasmas 17, 012107 (2010)] published Tue Jan 26, 2010. Energy release and transfer in guide field reconnection http://link.aip.org/link/?PHP/17/012109/1&agg=rss J. Birn and M. Hesse<br/> Properties of energy release and transfer by magnetic reconnection in the presence of a guide field are investigated on the basis of 2.5-dimensional magnetohydrodynamic (MHD) and particle-in-cell (PIC) simulations. Two initial configurations are considered: a plane current sheet with a uniform guide ... [Phys. Plasmas 17, 012109 (2010)] published Tue Jan 26, 2010. Suppression of Landau damping via electron band gap http://link.aip.org/link/?PHP/17/010703/1&agg=rss S. Son and S. Ku<br/> The pondermotive potential in the x-ray Raman compression can generate an electron band gap, which suppresses the Landau damping. The regime is identified where a Langmuir wave can be driven without damping in the stimulated Raman compression. It is shown that the partial wave breaking and the frequ ... [Phys. Plasmas 17, 010703 (2010)] published Tue Jan 26, 2010. Measurement of correlation-enhanced collision rates using pure ion plasmas http://link.aip.org/link/?PHP/17/055702/1&agg=rss F. Anderegg, C. F. Driscoll, D. H. E. Dubin, and T. M. O'Neil<br/> This paper presents the first direct experimental measurements of the Salpeter enhancement of collisions due to particle correlations. The perpendicular-to-parallel collision rate nu is measured in laser-cooled pure ion plasmas, spanning the regimes from weak to strong magnetization, and from weak t ... [Phys. Plasmas 17, 055702 (2010)] published Tue Jan 26, 2010. Atomic and molecular effects on spherically convergent ion flow. II. Multiple molecular species http://link.aip.org/link/?PHP/17/013503/1&agg=rss Gilbert A. Emmert and John F. Santarius<br/> A theoretical model for the effect of molecular interactions on the flow of molecular ions in spherically convergent geometry where the inner grid (cathode) is at a large negative potential and the outer grid (anode) is grounded has been developed. The model assumes a weakly ionized deuterium plasma ... [Phys. Plasmas 17, 013503 (2010)] published Mon Jan 25, 2010. Atomic and molecular effects on spherically convergent ion flow. I. Single atomic species http://link.aip.org/link/?PHP/17/013502/1&agg=rss G. A. Emmert and J. F. Santarius<br/> A formalism for analyzing the effect of ion-neutral gas interactions on the flow of ions between nearly transparent electrodes in spherical geometry has been developed for atomic ions in a weakly ionized plasma, so that the important atomic effects are charge exchange and ion impact ionization. The ... [Phys. Plasmas 17, 013502 (2010)] published Mon Jan 25, 2010. A statistical model of magnetic islands in a current layer http://link.aip.org/link/?PHP/17/010702/1&agg=rss R. L. Fermo, J. F. Drake, and M. Swisdak<br/> This letter describes a statistical model of the dynamics of magnetic islands in very large current layers that develop in space plasma. Two parameters characterize the island distribution: the flux psi contained in the island and the area A it encloses. The integrodifferential evolution equation fo ... [Phys. Plasmas 17, 010702 (2010)] published Mon Jan 25, 2010. Experiments on rotamak plasma equilibrium and shape control http://link.aip.org/link/?PHP/17/012506/1&agg=rss Yuri Petrov, Xiaokang Yang, Yonghui Wang, and Tian-Sen Huang<br/> A set of magnetic shaping coils and copper rings is installed in cylindrical chamber rotamak to allow for an active equilibrium control in 40 ms plasma discharges. The coils, which are powered by programmable current source, are used to control both the plasma shape and the boundary poloidal magneti ... [Phys. Plasmas 17, 012506 (2010)] published Fri Jan 22, 2010. Effects of nonequilibrium particle distributions in deuterium-tritium burning http://link.aip.org/link/?PHP/17/012707/1&agg=rss David Michta, Frank Graziani, Thomas Luu, and Jason Pruet<br/> The effects of nonequilibrium particle distributions resulting from rapid deuterium-tritium burning in plasmas are investigated using a FokkerPlanck code that incorporates small-angle Coulomb scattering, bremsstrahlung, Compton scattering, and light-ion fusion. For inertial confinement fusion enviro ... [Phys. Plasmas 17, 012707 (2010)] published Wed Jan 20, 2010. Investigation of magnetically self-insulated effect in an ion diode with an explosive emission potential electrode http://link.aip.org/link/?PHP/17/013104/1&agg=rss A. I. Pushkarev, J. I. Isakova, M. S. Saltimakov, and R. V. Sazonov<br/> The results of an experimental investigation of a magnetically self-insulated effect in an ion diode in bipolar-pulse mode are presented. The investigations were accomplished at the TEMP-4M accelerator by formation of a first negative pulse (100 ns, 150200 kV) and a second positive pulse (80 ns, 200 ... [Phys. Plasmas 17, 013104 (2010)] published Tue Jan 19, 2010. Response to Comment on `Experimental observation of carbon dioxide reduction in exhaust gas from hydrocarbon fuel burning' [Phys. Plasmas 17, 014701 (2010)] http://link.aip.org/link/?PHP/17/014702/1&agg=rss Han S. Uhm and Chul H. Kim<br/> A high-voltage cathode initiates an electron emission, resulting in a reduction in the carbon dioxide concentration in exhaust gas from the burning of hydrocarbon fuel. Assuming that the observed carbon dioxide reduction is originated from the molecular decomposition, the energy needed for the endot ... [Phys. Plasmas 17, 014702 (2010)] published Tue Jan 19, 2010. Initial experiments using radial foils on the Cornell Beam Research Accelerator pulsed power generator http://link.aip.org/link/?PHP/17/012706/1&agg=rss P.-A. Gourdain, I. C. Blesener, J. B. Greenly, D. A. Hammer, P. F. Knapp et al.<br/> A novel technique involving radial foil explosions can produce high energy density plasmas. A current flows radially inward in a 5 [mu]m thin aluminum foil from a circular anode, which contacts the foil on its outer rim, to the cathode, which connects to the foil at its geometrical center. When usi ... [Phys. Plasmas 17, 012706 (2010)] published Tue Jan 19, 2010. Comment on Experimental observation of carbon dioxide reduction in exhaust gas from hydrocarbon fuel burning [Phys. Plasmas 16, 114502 (2009)] http://link.aip.org/link/?PHP/17/014701/1&agg=rss Youngchul Byun and Dong Nam Shin<br/> The following comments are intended to clarify whether it is possible to convert CO into C+O by supplying just one-twentieth of energy required thermodynamically, only under the condition that the negative high voltage of dc is applied to the gas stream perpendicularly, in a recent article by Uhm an ... [Phys. Plasmas 17, 014701 (2010)] published Tue Jan 19, 2010. Dispersion relations of nonlinearly coupled electromagnetic and electrostatic waves in relativistic plasmas http://link.aip.org/link/?PHP/17/012305/1&agg=rss T. C. Pesch and H.-J. Kull<br/> In the present work large amplitude electromagnetic waves in cold plasmas at relativistic intensities are studied analytically in a plane wave geometry. Special attention is drawn to the nonlinear coupling of electromagnetic and electrostatic modes. In the framework of the AkhiezerPolovin model, per ... [Phys. Plasmas 17, 012305 (2010)] published Tue Jan 19, 2010. Electron beam current in high power cylindrical diode http://link.aip.org/link/?PHP/17/013103/1&agg=rss Amitava Roy, R. Menon, S. Mitra, Vishnu Sharma, S. K. Singh et al.<br/> Intense electron beam generation studies were carried out in high power cylindrical diode to investigate the effect of the accelerating gap and diode voltage on the electron beam current. The diode voltage has been varied from 130 to 356 kV, whereas the current density has been varied from 87 to 391 ... [Phys. Plasmas 17, 013103 (2010)] published Fri Jan 15, 2010. Electromagnetic drift instabilities in high-beta plasma under conditions of a field reversed configuration http://link.aip.org/link/?PHP/17/012105/1&agg=rss A. Yu. Chirkov and V. I. Khvesyuk<br/> Electromagnetic drift instabilities are studied in the conditions of a field reversed configuration (FRC). Dispersion equation is based on the set of VlasovMaxwell equations taking into account nonadiabatic responses both of ions and electrons. Considered drift instabilities are caused by density an ... [Phys. Plasmas 17, 012105 (2010)] published Fri Jan 15, 2010. Gyrokinetic simulations of ion temperature gradient modes in the reversed field pinch http://link.aip.org/link/?PHP/17/012304/1&agg=rss I. Predebon, C. Angioni, and S. C. Guo<br/> Linear gyrokinetic calculations are applied to the reversed field pinch configuration to investigate the occurrence of ion temperature gradient instabilities. The analysis shows this type of instability to be only marginally responsible for particle and energy transport. The required gradients could ... [Phys. Plasmas 17, 012304 (2010)] published Fri Jan 15, 2010. Observation of energetic electron confinement in a largely stochastic reversed-field pinch plasma http://link.aip.org/link/?PHP/17/012505/1&agg=rss D. J. Clayton, B. E. Chapman, R. O'Connell, A. F. Almagri, D. R. Burke et al.<br/> Runaway electrons with energies >100 keV are observed with the appearance of an m=1 magnetic island in the core of otherwise stochastic Madison Symmetric Torus [Dexter et al., Fusion Technol. 19, 131 (1991)] reversed-field-pinch plasmas. The island is associated with the innermost resonant tearing ... [Phys. Plasmas 17, 012505 (2010)] published Fri Jan 15, 2010. The reflection of an electromagnetic wave from the self-produced plasma http://link.aip.org/link/?PHP/17/012104/1&agg=rss M. Mirzaie, B. Shokri, and A. A. Rukhadze<br/> The dynamic behavior of a high power microwave beam propagating through a gaseous medium, which is ionized in the wave field is investigated. By solving the wave equation, the reflection index of the produced plasma is obtained. It is shown that the cut off condition is different from that of the st ... [Phys. Plasmas 17, 012104 (2010)] published Fri Jan 15, 2010. Ion acoustic solitary waves and double layers in dense electron-positron-ion magnetoplasma http://link.aip.org/link/?PHP/17/012106/1&agg=rss Prasanta Chatterjee, Taraknath Saha, S. V. Muniandy, C. S. Wong, and Rajkumar Roychoudhury<br/> The existence of ion acoustic solitary waves is studied in a magnetized dense electron-positron-ion plasma. The ions are described by the hydrodynamic equations, and the electron and positron are assumed to follow the ThomasFermi density distribution. The pseudopotential is derived directly from the ... [Phys. Plasmas 17, 012106 (2010)] published Fri Jan 15, 2010. Reaction-in-flight neutrons as a signature for shell mixing in National Ignition Facility capsules http://link.aip.org/link/?PHP/17/012705/1&agg=rss A. C. Hayes, P. A. Bradley, G. P. Grim, Gerard Jungman, and J. B. Wilhelmy<br/> Analytic calculations and results from computational simulations are presented that suggest that reaction-in-flight (RIF) neutrons can be used to diagnose mixing of the ablator shell material into the fuel in deuterium-tritium (DT) capsules designed for the National Ignition Facility (NIF) [J. A. Pa ... [Phys. Plasmas 17, 012705 (2010)] published Fri Jan 15, 2010. Modulational instability of ion-acoustic wave envelopes in magnetized quantum electron-positron-ion plasmas http://link.aip.org/link/?PHP/17/012103/1&agg=rss A. S. Bains, A. P. Misra, N. S. Saini, and T. S. Gill<br/> The amplitude modulation of quantum ion-acoustic waves (QIAWs) along an external magnetic field is studied in a quantum electron-positron-ion (e-p-i) magnetoplasma. Reductive perturbation technique is used to derive the three-dimensional nonlinear Schrodinger equation which governs the slow modulati ... [Phys. Plasmas 17, 012103 (2010)] published Fri Jan 15, 2010. Recurrence quantification analysis of turbulent fluctuations in the plasma edge of Tokamak Chauffage Alfven Bresilien tokamak http://link.aip.org/link/?PHP/17/012303/1&agg=rss Z. O. Guimaraes-Filho, I. L. Caldas, R. L. Viana, I. C. Nascimento, Yu. K. Kuznetsov et al.<br/> Recurrences are close returns of a given state in a time series, and can be used to identify different dynamical regimes and other related phenomena, being particularly suited for analyzing experimental data. In this work, we use recurrence quantification analysis to investigate dynamical patterns i ... [Phys. Plasmas 17, 012303 (2010)] published Thu Jan 14, 2010. Downstream heat flux profile versus midplane T profile in tokamaks http://link.aip.org/link/?PHP/17/012503/1&agg=rss Robert J. Goldston<br/> The relationship between the midplane scrape-off-layer (SOL) electron temperature profile and the parallel heat flux profile at the divertor in tokamaks is investigated. A model is applied that takes into account anisotropic thermal diffusion in rectilinear geometry with constant density. Eigenmode ... [Phys. Plasmas 17, 012503 (2010)] published Wed Jan 13, 2010. Growth and saturation of the axial instability in low wire number wire array Z pinches http://link.aip.org/link/?PHP/17/012704/1&agg=rss P. F. Knapp, J. B. Greenly, P.-A. Gourdain, C. L. Hoyt, M. R. Martin et al.<br/> The growth of the axial instability in low wire number wire array Z pinches using a 100 ns rise time, 1 MA pulsed power accelerator is examined. The axial instability manifests itself as a quasiperiodic variation of the radius of the coronal plasma along each wire and a consequent modulation of the ... [Phys. Plasmas 17, 012704 (2010)] published Wed Jan 13, 2010. Ionization oscillations in Hall accelerators http://link.aip.org/link/?PHP/17/014505/1&agg=rss S. Barral and Z. Peradzynski<br/> The underlying mechanism of low-frequency oscillations in Hall accelerators is investigated theoretically. It is shown that relaxation oscillations arise from a competition between avalanche ionization and the advective transport of the working gas. The model derived recovers the slow progression an ... [Phys. Plasmas 17, 014505 (2010)] published Wed Jan 13, 2010. Scaling properties of turbulence driven shear flow http://link.aip.org/link/?PHP/17/012302/1&agg=rss Z. Yan, G. R. Tynan, C. Holland, M. Xu, S. H. Muller et al.<br/> The characteristics and scaling properties of the turbulence driven shear flow are investigated in a cylindrical laboratory plasma device. For a given plasma pressure, the density fluctuation amplitude and radial particle flux increase with the applied magnetic field. Strong flow shear is found to c ... [Phys. Plasmas 17, 012302 (2010)] published Wed Jan 13, 2010. A matching problem revisited for stability analysis of resistive wall modes in flowing plasmas http://link.aip.org/link/?PHP/17/012504/1&agg=rss J. Shiraishi, S. Tokuda, and N. Aiba<br/> The classical matching problem for magnetohydrodynamic stability analysis is revisited to study effects of the plasma flow on the resistive wall modes (RWMs). The Newcomb equation, which describes the marginal states and governs the regions except for the resonant surface, is generalized to analyze ... [Phys. Plasmas 17, 012504 (2010)] published Wed Jan 13, 2010. Cross-helicity dynamo effect in magnetohydrodynamic turbulent channel flow http://link.aip.org/link/?PHP/17/012301/1&agg=rss Fujihiro Hamba and Masataka Tsuchiya<br/> A large eddy simulation of magnetohydrodynamic (MHD) turbulent channel flow is carried out to investigate the dynamo mechanism. It is shown that the streamwise component of the mean magnetic field is generated and sustained due to the effect of the turbulent electromotive force. The Reynolds-average ... [Phys. Plasmas 17, 012301 (2010)] published Wed Jan 13, 2010. Dispersion properties of electrostatic sound wave modes in carbon nanotubes http://link.aip.org/link/?PHP/17/014504/1&agg=rss Afshin Moradi<br/> The theoretical analysis of electrostatic sound wave modes in multiwalled carbon nanotubes is presented within the framework of the fluid theory in conjunction with the Poisson's equation. The electron and ion components of each wall of nanotubes are regarded as two-species plasma system, in which t ... [Phys. Plasmas 17, 014504 (2010)] published Tue Jan 12, 2010. Large amplitude dust acoustic solitary waves and double layers in positively charged warm dusty plasma with nonthermal electrons http://link.aip.org/link/?PHP/17/014503/1&agg=rss Animesh Das, Anup Bandyopadhyay, and K. P. Das<br/> Large amplitude dust acoustic solitary waves and double layers in a nonthermal plasma consisting of positively charged dust grains, nonthermal electrons, and isothermal ions including the effect of dust temperature have been studied using the Sagdeev potential technique by a computational scheme. Th ... [Phys. Plasmas 17, 014503 (2010)] published Tue Jan 12, 2010. Experimental validation of a diagnostic technique for tuning the fourth shock timing on National Ignition Facility http://link.aip.org/link/?PHP/17/012703/1&agg=rss H. F. Robey, T. R. Boehly, R. E. Olson, A. Nikroo, P. M. Celliers et al.<br/> Capsule implosions on the National Ignition Facility (NIF) [Lindl et al., Phys. Plasmas 11, 339 (2004)] will be driven with a carefully tailored sequence of four shock waves that must be timed to very high precision in order to keep the fuel on a low adiabat. The Hohlraum conditions present during t ... [Phys. Plasmas 17, 012703 (2010)] published Mon Jan 11, 2010.