POP: Basic Plasma Phenomena, Waves, Instabilities http://scitation.aip.org/ POP: Basic Plasma Phenomena, Waves, Instabilities Fully kinetic description of the linear excitation and nonlinear saturation of fast-ion-driven geodesic acoustic mode instability http://link.aip.org/link/?PHP/19/022102/1&agg=rss D. Zarzoso, X. Garbet, Y. Sarazin, R. Dumont, and V. Grandgirard<br/> We show in this paper that geodesic acoustic modes (GAMs) can be efficiently excited by a population of fast ions even when Landau damping on thermal ions is accounted for. We report in particular fully kinetic calculations of the GAM dispersion relation and its complete solution. Written under a va ... [Phys. Plasmas 19, 022102 (2012)] published Wed Feb 8, 2012. Reduced magnetohydrodynamic theory of oblique plasmoid instabilities http://link.aip.org/link/?PHP/19/022101/1&agg=rss S. D. Baalrud, A. Bhattacharjee, and Y.-M. Huang<br/> The three-dimensional nature of plasmoid instabilities is studied using the reduced magnetohydrodynamic equations. For a Harris equilibrium with guide field, represented by B=Btanh(x/lambda)y+Bz-hat, a spectrum of modes are unstable at multiple resonant surfaces in the current sheet, rather than jus ... [Phys. Plasmas 19, 022101 (2012)] published Fri Feb 3, 2012. Magnetized and collimated millimeter scale plasma jets with astrophysical relevance http://link.aip.org/link/?PHP/19/012121/1&agg=rss Parrish C. Brady, Hernan J. Quevedo, Prashant M. Valanju, Roger D. Bengtson, and Todd Ditmire<br/> Magnetized collimated plasma jets are created in the laboratory to extend our understanding of plasma jet acceleration and collimation mechanisms with particular connection to astrophysical jets. In this study, plasma collimated jets are formed from supersonic unmagnetized flows, mimicking a stellar ... [Phys. Plasmas 19, 012121 (2012)] published Tue Jan 31, 2012. Observation of electron plasma waves inside large amplitude electromagnetic pulses in a temporally growing plasma http://link.aip.org/link/?PHP/19/012118/1&agg=rss Shail Pandey, Sudeep Bhattacharjee, and Debaprasad Sahu<br/> Observation of electron plasma waves excited inside high power (~10 kW) short pulse (~20 [mu]s) electromagnetic (em) waves interacting with a gaseous medium (argon) in the pressure range 0.22.5 mTorr is reported. The waves have long wavelength (~13 cm) and get damped at time scales slower (~3 [mu]s) ... [Phys. Plasmas 19, 012118 (2012)] published Thu Jan 26, 2012. Numerical investigation of the ion temperature effect in magnetized plasma sheath with two species of positive ions http://link.aip.org/link/?PHP/19/012120/1&agg=rss A. K. Shaw, S. Kar, K. S. Goswami, and B. J. Saikia<br/> The effect of ion temperature, magnitude of magnetic field and its orientation on a magnetized plasma sheath consisting of electrons and two species of positive ions are investigated. Using three-fluid hydrodynamic model and some dimensionless variables, the dimensionless equations are obtained and ... [Phys. Plasmas 19, 012120 (2012)] published Thu Jan 26, 2012. Two dimensional nonplanar evolution of electrostatic shock waves in pair-ion plasmas http://link.aip.org/link/?PHP/19/012119/1&agg=rss W. Masood and H. Rizvi<br/> Electrostatic waves in a two dimensional nonplanar geometry are studied in an unmagnetized, dissipative pair-ion plasma in the presence of weak transverse perturbations. The dissipation in the system is taken into account by incorporating the kinematic viscosity of both positive and negative ions in ... [Phys. Plasmas 19, 012119 (2012)] published Thu Jan 26, 2012. Propagation of nonlinear coherent structures in a collisional magnetoplasma with nonthermal electrons and finite ion temperature http://link.aip.org/link/?PHP/19/012117/1&agg=rss W. Masood, H. Rizvi, and N. Imtiaz<br/> Nonlinear electrostatic waves in dissipative magnetized electron-ion (e-i) plasmas are investigated employing the two fluid model. In this regard, Zakharov Kuznetsov Burgers (ZKB) equation is derived using the small amplitude perturbation expansion method. It is observed that the nonthermal electron ... [Phys. Plasmas 19, 012117 (2012)] published Tue Jan 24, 2012. Sheared-flow induced confinement transition in a linear magnetized plasma http://link.aip.org/link/?PHP/19/012116/1&agg=rss S. Zhou, W. W. Heidbrink, H. Boehmer, R. McWilliams, T. A. Carter et al.<br/> A magnetized plasma cylinder (12 cm in diameter) is induced by an annular shape obstacle at the Large Plasma Device [W. Gekelman, H. Pfister, Z. Lucky, J. Bamber, D. Leneman, and J. Maggs, Rev. Sci. Instrum. 62, 2875 (1991)]. Sheared azimuthal flow is driven at the edge of the plasma cylinder throug ... [Phys. Plasmas 19, 012116 (2012)] published Mon Jan 23, 2012. Collisionless distribution function for the relativistic force-free Harris sheet http://link.aip.org/link/?PHP/19/012115/1&agg=rss C. R. Stark and T. Neukirch<br/> A self-consistent collisionless distribution function for the relativistic analogue of the force-free Harris sheet is presented. This distribution function is the relativistic generalization of the distribution function for the non-relativistic collisionless force-free Harris sheet recently found by ... [Phys. Plasmas 19, 012115 (2012)] published Mon Jan 23, 2012. Effect of dust charging and trapped electrons on nonlinear solitary structures in an inhomogeneous magnetized plasma http://link.aip.org/link/?PHP/19/012114/1&agg=rss Ravinder Kumar, Hitendra K. Malik, and Khushvant Singh<br/> Main concerns of the present article are to investigate the effects of dust charging and trapped electrons on the solitary structures evolved in an inhomogeneous magnetized plasma. Such a plasma is found to support two types of waves, namely, fast wave and slow wave. Slow wave propagates in the plas ... [Phys. Plasmas 19, 012114 (2012)] published Mon Jan 23, 2012. The effect of q-distributed electrons on the head-on collision of ion acoustic solitary waves http://link.aip.org/link/?PHP/19/012113/1&agg=rss Uday Narayan Ghosh, Prasanta Chatterjee, and Rajkumar Roychoudhury<br/> The head-on collision of ion acoustic solitary waves (IASWs) in two component plasma comprising nonextensive distributed electrons is investigated. Two opposite directional Kortewg-de-vries (KdV) equations are derived and the phase shift due to collision is obtained using the extended version of Poi ... [Phys. Plasmas 19, 012113 (2012)] published Mon Jan 23, 2012. Effect of guide field on lower-hybrid drift instabilities in current sheet containing energetic particles http://link.aip.org/link/?PHP/19/012110/1&agg=rss Feng Huang, Yinhua Chen, Yibao Li, and M. Y. Yu<br/> The effect of a guide field on the linear lower-hybrid drift instability (LHDI) in a thin current sheet containing energetic particles is investigated using kinetic theory. It is found that the symmetry properties of the LHD modes are destroyed by the guide field. The LHDI growth rate decreases with ... [Phys. Plasmas 19, 012110 (2012)] published Fri Jan 20, 2012. Landau damping of a driven plasma wave from laser pulses http://link.aip.org/link/?PHP/19/012112/1&agg=rss Zhigang Bu and Peiyong Ji<br/> The interaction between a laser pulse and a driven plasma wave with a phase velocity approaching the speed of light is studied, and our investigation is focused on the Gaussian laser pulse. It is demonstrated that when the resonance condition between the plasma wave and the laser pulse is satisfied, ... [Phys. Plasmas 19, 012112 (2012)] published Fri Jan 20, 2012. Minimum energy states of the cylindrical plasma pinch in single-fluid and Hall magnetohydrodynamics http://link.aip.org/link/?PHP/19/012111/1&agg=rss I. V. Khalzov, F. Ebrahimi, D. D. Schnack, and V. V. Mirnov<br/> Relaxed states of a plasma column are found analytically in single-fluid and Hall magnetohydrodynamics (MHD). We perform complete minimization of the energy with constraints imposed by invariants inherent in the corresponding models. It is shown that the relaxed state in Hall MHD is a force-free mag ... [Phys. Plasmas 19, 012111 (2012)] published Fri Jan 20, 2012. Stimulated Raman scattering coupled to decay instability in a plasma channel http://link.aip.org/link/?PHP/19/012109/1&agg=rss Ranjeet Singh and V. K. Tripathi<br/> A non local theory of Stimulated Raman scattering (SRS) coupled to decay instability in a plasma channel is developed. The primary Langmuir wave, produced in the Raman backscattering process, decays into a secondary Langmuir wave of longer wavelength and an ion acoustic wave. This diversion of energ ... [Phys. Plasmas 19, 012109 (2012)] published Fri Jan 20, 2012. A comprehensive study of different gases in inductively coupled plasma torch operating at one atmosphere http://link.aip.org/link/?PHP/19/012108/1&agg=rss Sangeeta B. Punjabi, N. K. Joshi, H. A. Mangalvedekar, B. K. Lande, A. K. Das et al.<br/> A numerical study is done to understand the possible operating regimes of RF-ICP torch (3 MHz, 50 kW) using different gases for plasma formation at atmospheric pressure. A two dimensional numerical simulation of RF-ICP torch using argon, nitrogen, oxygen, and air as plasma gas has been investigated ... [Phys. Plasmas 19, 012108 (2012)] published Thu Jan 19, 2012. Effect of ionization distribution on the low frequency oscillations mode in Hall thrusters http://link.aip.org/link/?PHP/19/012107/1&agg=rss Wei Liqiu, Wang Chunsheng, Han Ke, and Yu Daren<br/> It is found that the discharge parameters have notable effects on the mode of discharge current low frequency oscillation in Hall thrusters, but different discharge parameters might form the similar low frequency oscillation mode. In order to study the mechanism of oscillation mode formation, the io ... [Phys. Plasmas 19, 012107 (2012)] published Thu Jan 12, 2012. Ion acoustic solitons in a plasma with two-temperature kappa-distributed electrons http://link.aip.org/link/?PHP/19/012106/1&agg=rss T. K. Baluku and M. A. Hellberg<br/> Existence domains and characteristics of ion acoustic solitons are studied in a two-temperature electron plasma with both electron components being kappa-distributed, as found in Saturn's magnetosphere. As is the case for double-Boltzmann electrons, solitons of both polarities can exist over restric ... [Phys. Plasmas 19, 012106 (2012)] published Thu Jan 12, 2012. Relation of astrophysical turbulence and magnetic reconnection http://link.aip.org/link/?PHP/19/012105/1&agg=rss A. Lazarian, Gregory L. Eyink, and E. T. Vishniac<br/> Astrophysical fluids are generically turbulent and this must be taken into account for most transport processes. We discuss how the preexisting turbulence modifies magnetic reconnection and how magnetic reconnection affects the MHD turbulent cascade. We show the intrinsic interdependence and interre ... [Phys. Plasmas 19, 012105 (2012)] published Wed Jan 11, 2012. Adiabatic nonlinear waves with trapped particles. III. Wave dynamics http://link.aip.org/link/?PHP/19/012104/1&agg=rss I. Y. Dodin and N. J. Fisch<br/> The evolution of adiabatic waves with autoresonant trapped particles is described within the Lagrangian model developed in Paper I, under the assumption that the action distribution of these particles is conserved, and, in particular, that their number within each wavelength is a fixed independent p ... [Phys. Plasmas 19, 012104 (2012)] published Fri Jan 6, 2012. Adiabatic nonlinear waves with trapped particles. II. Wave dispersion http://link.aip.org/link/?PHP/19/012103/1&agg=rss I. Y. Dodin and N. J. Fisch<br/> A general nonlinear dispersion relation is derived in a nondifferential form for an adiabatic sinusoidal Langmuir wave in collisionless plasma, allowing for an arbitrary distribution of trapped electrons. The linear dielectric function is generalized, and the nonlinear kinetic frequency shift omega ... [Phys. Plasmas 19, 012103 (2012)] published Fri Jan 6, 2012.