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  Subjects -> PHYSICS (Total: 800 journals)
    - ELECTRICITY AND MAGNETISM (9 journals)
    - MECHANICS (21 journals)
    - NUCLEAR PHYSICS (51 journals)
    - OPTICS (86 journals)
    - PHYSICS (576 journals)
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PHYSICS (576 journals)            First | 1 2 3 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 6)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 7)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 9)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 1)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 11)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 14)
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Nanotechnology     Hybrid Journal   (Followers: 7)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal  
International Journal of Physical Sciences     Open Access  
International Journal of Physics     Open Access   (Followers: 12)
International Journal of PIXE     Hybrid Journal  
International Journal of Quantum Information     Hybrid Journal   (Followers: 4)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (Followers: 2)
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 7)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 3)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 13)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 18)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 16)
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 12)
International Materials Reviews     Hybrid Journal   (Followers: 14)
Inverse Problems     Hybrid Journal   (Followers: 3)
IOP Conference Series: Materials Science and Engineering     Open Access   (Followers: 8)
Iranian Journal of Medical Physics     Open Access  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 6)
Izvestiya Atmospheric and Oceanic Physics     Hybrid Journal   (Followers: 3)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 3)
Japanese Journal of Applied Physics     Full-text available via subscription   (Followers: 5)
JETP Letters     Hybrid Journal   (Followers: 4)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 14)
Journal of Advances in Physics     Open Access   (Followers: 20)
Journal of Applied Mathematics and Mechanics     Full-text available via subscription   (Followers: 7)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 8)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 77)
Journal of Applied Remote Sensing     Hybrid Journal   (Followers: 63)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 8)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 41)
Journal of Basic and Applied Physics     Open Access   (Followers: 3)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 18)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 320)
Journal of Computational Physics     Hybrid Journal   (Followers: 64)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 11)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 12)
Journal of Elasticity     Hybrid Journal   (Followers: 6)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 2)
Journal of Electronic Materials     Hybrid Journal   (Followers: 5)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 5)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 19)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 1)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 4)
Journal of Geometry and Physics     Full-text available via subscription  
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 134)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 24)
Journal of High Energy Physics     Hybrid Journal   (Followers: 18)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access  
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 17)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Hybrid Journal   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 6)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 12)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 8)
Journal of Luminescence     Hybrid Journal   (Followers: 4)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 24)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 2)
Journal of Materials Science     Hybrid Journal   (Followers: 21)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 6)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 5)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 8)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 25)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 13)
Journal of Modern Physics     Open Access   (Followers: 7)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 7)
Journal of Motor Behavior     Hybrid Journal   (Followers: 10)
Journal of Multiscale Modeling     Hybrid Journal  
Journal of Nanophotonics     Hybrid Journal   (Followers: 9)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 1)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 1)
Journal of Optics     Hybrid Journal   (Followers: 8)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Full-text available via subscription   (Followers: 40)
Journal of Physical Chemistry C     Full-text available via subscription   (Followers: 34)
Journal of Physical Oceanography     Full-text available via subscription   (Followers: 13)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 9)
Journal of Physics A : Mathematical and Theoretical     Hybrid Journal   (Followers: 20)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 5)
Journal of Physics D : Applied Physics     Hybrid Journal   (Followers: 14)
Journal of Physics: Condensed Matter     Hybrid Journal   (Followers: 7)
Journal of Physics: Conference Series     Open Access   (Followers: 2)
Journal of Plasma Physics     Hybrid Journal   (Followers: 21)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 23)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 2)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 2)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Research in Physics     Open Access   (Followers: 13)
Journal of Rheology     Full-text available via subscription   (Followers: 5)
Journal of Romance Studies     Full-text available via subscription   (Followers: 2)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 3)
Journal of Scientific Research     Open Access  
Journal of Semiconductors     Full-text available via subscription   (Followers: 4)
Journal of Sensors     Open Access   (Followers: 24)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Lighting     Open Access  
Journal of Spectroscopy     Open Access   (Followers: 7)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Hybrid Journal   (Followers: 4)
Journal of Testing and Evaluation     Full-text available via subscription   (Followers: 20)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 29)
Journal of the Brazilian Society of Mechanical Sciences     Open Access   (Followers: 2)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of Theoretical and Applied Physics     Open Access   (Followers: 8)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 41)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University SCIENCE A     Hybrid Journal  
Jurnal Fisika     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Pendidikan Fisika     Open Access   (Followers: 4)
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access   (Followers: 2)
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Jurnal Sains dan Pendidikan Fisika     Open Access  
Karbala International Journal of Modern Science     Open Access   (Followers: 3)
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 13)
Les Houches Summer School Proceedings     Full-text available via subscription   (Followers: 1)
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access  
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 2)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 3)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 3)
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 29)
Matéria (Rio de Janeiro)     Open Access   (Followers: 1)
Materials & Design     Hybrid Journal   (Followers: 42)
Materials at High Temperatures     Full-text available via subscription   (Followers: 6)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 16)
Materials Research     Open Access   (Followers: 8)
Materials Research Bulletin     Hybrid Journal   (Followers: 27)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 9)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 42)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 20)
Materials Science and Engineering: C     Hybrid Journal   (Followers: 19)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 17)
Materials Science and Technology     Hybrid Journal   (Followers: 43)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 1)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access  
Meccanica     Hybrid Journal  
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 4)
Mechanics of Materials     Hybrid Journal   (Followers: 22)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 2)
Metamaterials     Hybrid Journal   (Followers: 3)
Micro and Nano Systems Letters     Open Access   (Followers: 5)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 10)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 10)
Modern Instrumentation     Open Access   (Followers: 33)
Modern Physics Letters A     Hybrid Journal   (Followers: 15)
Modern Physics Letters B     Hybrid Journal   (Followers: 10)
Molecular Astrophysics     Full-text available via subscription  
Molecular Diversity     Hybrid Journal  
Moscow University Physics Bulletin     Hybrid Journal  
Multibody System Dynamics     Hybrid Journal   (Followers: 2)
NANO     Hybrid Journal   (Followers: 5)
Nano Letters     Full-text available via subscription   (Followers: 61)
Nano Reviews & Experiments     Open Access   (Followers: 13)
Nano-Micro Letters     Open Access   (Followers: 2)
NanoBioImaging     Open Access  
Nanomechanics     Open Access  
Nanoscale and Microscale Thermophysical Engineering     Hybrid Journal   (Followers: 3)
Nanoscale Research Letters     Open Access   (Followers: 5)
Nanospectroscopy     Open Access   (Followers: 1)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 31)

  First | 1 2 3 | Last

Journal Cover Contributions to Plasma Physics
  [SJR: 0.717]   [H-I: 36]   [3 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0863-1042 - ISSN (Online) 1521-3986
   Published by John Wiley and Sons Homepage  [1589 journals]
  • The screened cluster equation of state for hydrogen–helium mixtures:
           Atomic, molecular, and ionic contributions from first principles
    • Authors: V. Ballenegger; A. Alastuey, D. Wendland
      Abstract: We present a method that provides reliable equations of state for partially ionized gases at moderate densities. The gas is described within the physical picture in terms of a quantum plasma made with nuclei and electrons interacting via the Coulomb potential. The method relies on the screened cluster representation derived elsewhere and is obtained by resummations of Mayer-like diagrammatics for the equivalent classical gas of loops. The contributions to the thermodynamics of atoms, molecules, or ions are described by cluster functions built with simple diagrams involving a few elementary particles and screened interactions. All quantum and collective mechanisms at work are embedded in these cluster functions, which can be computed numerically by sampling the corresponding path integrals. The usefulness and accuracy of this formalism is illustrated by considering a hydrogen–helium mixture under solar interior conditions. As a by-product of our calculations, we also exhibit the density dependence of the two-body cluster function analogous to the second virial coefficient in a hydrogen gas.
      PubDate: 2018-01-12T04:11:23.407339-05:
      DOI: 10.1002/ctpp.201700189
       
  • On the Kubo-Greenwood model for electron conductivity
    • Authors: James Dufty; Jeffrey Wrighton, Kai Luo, S.B. Trickey
      Abstract: Currently, the most common approach to calculate transport properties for materials under extreme conditions is based on the phenomenological Kubo-Greenwood method. The results of an inquiry into the justification and context of that model are summarized here. Specifically, the basis for its connection to equilibrium density functional theory (DFT) and the assumption of static ions are discussed briefly.
      PubDate: 2018-01-08T02:05:20.827953-05:
      DOI: 10.1002/ctpp.201700102
       
  • A new high-order fluid solver for tokamak edge plasma transport
           simulations based on a magnetic-field independent discretization
    • Authors: G. Giorgiani; T. Camminady, H. Bufferand, G. Ciraolo, P. Ghendrih, H. Guillard, H. Heumann, B. Nkonga, F. Schwander, E. Serre, P. Tamain
      Abstract: Our global understanding of the power exhaust in tokamaks, and its implications for both steady-state and transient heat loads on divertor and limiter PFCs, is still poor. In transient situations in particular, such as during start-up or control operations, the evolution of particles and heat fluxes is little known, although they are critical for the safety of the machine. The heat load is largely determined by the physics of the Scrape-Off Layer (SOL), and therefore, it depends to a large extent on the geometry of the magnetic surfaces as well as on the geometry of wall components. A better characterization of the heat exhaust mechanisms is therefore required to improve the capabilities of the transport codes in terms of geometrical description of the wall components and in terms of the description of the magnetic geometry. For transient simulations, it becomes crucial to be able to deal with non-stationary magnetic configurations. In particular, avoiding expensive re-meshing of the computational domain is mandatory. In an attempt to achieve these goals, we propose a new fluid solver based on a high-order hybrid discontinuous Galerkin (HDG) finite element method. Capitalizing on the experience acquired in the development of the SOLEDGE2D-EIRENE transport model, we propose to study edge plasma transport in the frame of a reduced model (but containing most of the challenging issues regarding accurate numerical simulations) based on electron density and parallel momentum. The code is verified using manufactured solutions and validated using well-referenced simulations in a realistic WEST geometry. Finally, we demonstrate how the particle fluxes at the wall vary in our model when the magnetic equilibrium evolves in time, particularly during the equilibrium construction skip from a limiter configuration to a diverted one at the beginning of the operation.
      PubDate: 2018-01-08T02:01:07.000353-05:
      DOI: 10.1002/ctpp.201700172
       
  • Influence of ambient pressure on the performance of an arc discharge
           plasma actuator
    • Authors: Tian Gan; Di Jin, Shangguang Guo, Yun Wu, Yinghong Li
      Abstract: The arc discharge plasma actuator (ADPA) has wide application prospects in high-speed flow control because of its local heating effect and strong disturbance. In this paper, the influence of ambient pressure, which ranges from 3 to 20 kPa, on the performance of a two-electrode ADPA is investigated by a schlieren system. The duration of the arc heated region, as well as its area, is extracted by image processing. As the ambient pressure increases, different flow field evolutions occur. The duration of the ADPA heated region increases with the ambient pressure. The maximum duration reaches 1185.3 µs at 20 kPa. The velocity of the discharge-induced blast shock wave first decreases gradually and then remains at 345 m/s for all air pressures. The blast shock wave has a higher velocity at lower pressures when it is freshly produced. A maximum blast shock wave velocity of 582 m/s is observed at the pressure of 7 kPa. The arc heated region is not sensitive to ambient pressure, but the deposited energy from the arc increases when the pressure increases.
      PubDate: 2018-01-04T00:45:54.229989-05:
      DOI: 10.1002/ctpp.201700133
       
  • High-explosive generators of dense low-temperature plasma for proton
           radiography
    • Authors: V.B. Mintsev; N.S. Shilkin, V.Ya. Ternovoi, D.N. Nikolaev, D.S. Yuriev, A.A. Golubev, A.V. Kantsyrev, A.V. Skobliakov, A.V. Bogdanov, D.V. Varentsov, D.H.H. Hoffmann
      Abstract: The article reviews the design and physical applications of high-explosive generators for dense low-temperature plasma. The PUMA proton microscope with magnetic optics at the Institute for Theoretical and Experimental Physics by A.I. Alikhanov of National Research Centre «Kurchatov Institute» (Moscow, Russia) was used to diagnose the plasma. The generators were developed for measurements of the equation of state of non-ideal plasma, investigation of phase transitions in hydrogen or molecular gases, and studies of the properties of the interior of Giant planets. A proposal was made to repeat the experiments with explosive generators using the proton microscope PRIOR (Proton Microscope for Facility for Anti-proton and Ion Research) at the GSI Helmholtzzentrum fur Schwerionenforschung (Darmstadt, Germany) and at the designed proton microscope at the Institute for Nuclear Research (Troitsk, Russia).
      PubDate: 2018-01-04T00:36:00.327875-05:
      DOI: 10.1002/ctpp.201700141
       
  • Transport properties of disordered two-dimensional complex plasma crystal
    • Authors: E.G. Kostadinova; F. Guyton, A. Cameron, K. Busse, C. Liaw, L.S. Matthews, T.W. Hyde
      Abstract: In this study, we numerically investigate the transport properties of a two-dimensional (2D) complex plasma crystal using diffusion of coplanar dust lattice waves. In the limit where the Hamiltonian interactions can be decoupled from the non-Hamiltonian effects, we identify two distinct types of wave transport: Anderson-type delocalization and long-distance excitation. We use a recently developed spectral approach to evaluate the contribution of the Anderson problem and compare it to the results of the simulation. The benefit of our approach to transport problems is twofold. First, we employ a highly tuneable macroscopic hexagonal crystal, which exhibits many-body interactions and allows for the investigation of transport properties at the kinetic level. Second, the analysis of the transport problem in 2D is provided using an innovative spectral approach, which avoids the use of scaling and boundary conditions. The comparison between the analytically predicted and numerically observed wave dynamics allows for the study of important characteristics of this open system. In our simulations, we observe long-distance lattice excitation, which occurs around lattice defects even when the initial perturbation does not spread from the centre to the exterior of the crystal. In the decoupled Hamiltonian regime, this many-body effect can be attributed to the dust lattice interaction with the plasma environment.
      PubDate: 2018-01-03T05:17:52.333617-05:
      DOI: 10.1002/ctpp.201700111
       
  • Simultaneous effect of an external magnetic field and gas-induced friction
           on the caging of particles in two-dimensional Yukawa systems
    • Authors: Karlygash N. Dzhumagulova; Ranna U. Masheyeva, Tlekkabul S. Ramazanov, Guoxing Xia, Maksat N. Kalimoldayev, Zoltán Donkó
      Abstract: We investigate the simultaneous effect of a static homogeneous external magnetic field and a background gas medium on the quasi-localization of the dust particles—characterized quantitatively by cage correlation functions—in strongly coupled two-dimensional Yukawa systems. We apply the Langevin dynamics computer simulation method in which the frictional and Lorentz forces are taken into account. Both the presence of the magnetic field and the friction originating from the background gas, when acting alone, increase the caging time. When present simultaneously, however, we find that their effects combine in a non-trivial manner and act against each other within a window of the parameter values.
      PubDate: 2017-12-28T22:51:05.882966-05:
      DOI: 10.1002/ctpp.201700143
       
  • Equation of state and transport properties of metals in warm dense matter
           regime
    • Authors: A.L. Khomkin; A.S. Shumikhin
      Abstract: The equation of state, composition, and electrical conductivity are calculated for the supercritical ionized fluid of aluminium. For calculation, we used the previously proposed chemical plasma model called “3+”-component. The model includes atoms, immersed in jellium, and thermal electrons and ions. Part of the bound states electron density is referred to as jellium. The density of electron jellium increases with the compression of atomic gas and does not depend on temperature directly. The emergence of jellium can be termed the process of ionization in the full sense of the word. The conductivity of dense vapours is determined by the sum of the conductivity of the thermal electrons, calculated according to the Frost formula, and the conductivity of jellium, calculated according to the Regel–Ioffe formula. At compression, the electrical conductivity passes through the minimum from the conductivity of thermal electrons to the conductivity of electrons of jellium accordingly. Calculations of the equation of state and the electrical conductivity of supercritical metal vapours agree well with physical and numerical experimental data.
      PubDate: 2017-12-28T06:46:02.923126-05:
      DOI: 10.1002/ctpp.201700145
       
  • Neutral gas simulation on the influence of rotating spokes on gas
           rarefaction in high-power impulse magnetron sputtering
    • Authors: Jan Trieschmann
      Abstract: High-power impulse magnetron sputtering (HiPIMS) relies on electrical power deposition constricted to very short time intervals for the generation of intense plasmas. Typically, this leads to a substantial “background gas” rarefaction immanent to the harsh discharge conditions. Experimental observations, in addition, suggest the presence of localized ionization zones rotating in an azimuthal direction, with typical angular frequencies of ωsp ≥ 100 kHz, for example, observed for discharges using small laboratory targets. To understand the gas dynamics within these discharges, a three-dimensional kinetic neutral particle model, building on the direct simulation Monte Carlo (DSMC) method, is utilized. By considering solely neutral particles, the influence of accompanying plasma phenomena (e.g., depletion due to ionization) is neglected. For a generic discharge setup, the rarefaction and relaxation dynamics of sputtered aluminium and “background” argon is investigated. Subsequently, the implications of a localized rotating sputtering pattern onto the respective transport dynamics are considered. With sole regards to neutral particles, it is found that the presence of fast spoke-like dynamics is of subordinate relevance due to the inherent collisional and transport time scales. These results present only approximate solutions compared to the case when plasma dynamics are comprehensively considered. The latter scenario, however, is presently inaccessible in terms of three-dimensional kinetic simulations.
      PubDate: 2017-12-28T06:45:55.022718-05:
      DOI: 10.1002/ctpp.201700062
       
  • Impact of hexamethyldisiloxane admixtures on the discharge characteristics
           of a dielectric barrier discharge in argon for thin film deposition
    • Authors: Detlef Loffhagen; Markus M. Becker, Andreas K. Czerny, Jens Philipp, Claus-Peter Klages
      Abstract: Atmospheric-pressure dielectric barrier discharges (DBDs) in argon with admixtures of small amounts of hexamethyldisiloxane (HMDSO) have been analysed by means of numerical modelling. A time-dependent, spatially one-dimensional fluid-Poisson model has been used, which takes into account the spatial variation of the discharge plasma between the plane-parallel dielectrics covering the electrodes. Main features of the model, including the reaction kinetics for HMDSO, are given. Good agreement with related experimental studies of the ignition voltage for HMDSO amounts of up to 200 ppm and the temporal course of the discharge current for conditions typical of deposition experiments is obtained by the model calculations when assuming that 30% of the reactions of HMDSO with excited argon atoms, with a rate coefficient of 5.0 × 10−10 cm3/s, lead to the production of electrons due to Penning ionization. The modelling results for constant frequency f = 86.2 kHz and applied voltage Ua = 4 kV show that the electrical energy dissipated in the DBD decreases with an increasing amount of HMDSO and enable the determination of the energy absorbed per HMDSO molecule on the basis of their energy balance. The analysis of the plasma–chemical processes also makes clear that collision processes of HMDSO with excited argon atoms and molecules leading to neutral reaction products are essential for the formation of thin polymer films.
      PubDate: 2017-12-28T06:41:52.398295-05:
      DOI: 10.1002/ctpp.201700060
       
  • Accelerator-driven high-energy-density physics: Status and chances
    • Authors: J. Ren; C. Maurer, P. Katrik, P.M. Lang, A.A. Golubev, V. Mintsev, Y. Zhao, D.H.H. Hoffmann
      Abstract: We review the development of high-energy-density physics (HEDP) driven by intense particle beams, and give an account of the current status and the anticipated developments in the near future. Since progress of this field is strongly coupled to the technical development of high-current accelerators, we report on the recent results in specific areas of high-current accelerators relevant to HEDP. These are related to dynamic vacuum problems and the activation of accelerator structural material by high-current, high-energy particle beams, and we give an example of dense plasma diagnostics with high-energy protons. The reported results have been achieved at existing machines at the Gesellschaft für Schwerionenforschung (GSI-Darmstadt), the Institute of Theoretical and Experimental Physics in Moscow (ITEP-Moscow), and the Institute of Modern Physics (IMP-Lanzhou), and they are relevant for facilities under construction such as the FAIR facility in Darmstadt and the High Intensity Accelerator Facility (HIAF) proposed in China.
      PubDate: 2017-12-27T03:52:22.835728-05:
      DOI: 10.1002/ctpp.201700110
       
  • Non-linear screening and phase states of a complex plasma
    • Authors: I.A. Martynova; I.L. Iosilevskiy, A.A. Shagayda
      Abstract: The applicability limit of the well-known phase diagram of complex plasmas in the κ–Γ plane (κ is the structural parameter, Γ is the coupling parameter) is under discussion. The present work is devoted to the analysis of the range of applicability of a basic assumption in the initial phase diagram, that is, linearized (Debye) screening of macro-ions by micro-ions, which leads to the Yukawa form of effective interactions between macro-ions. Parameters of non-linear screening for macro-ions were calculated within the direct Poisson–Boltzmann approximation in an averaged Wigner–Seitz cell. Two effects were revealed as a result of such calculations: (a) decomposition of all micro-ions into two subclasses, free and bound ones, and (b) significant reduction of the effective charge Z* of initial bare macro-ion Z under non-linear screening by the small high-density envelope of bound micro-ions. This effect leads to a re-normalization of initial Γ and κ into Γ* and κ* (Γ* 
      PubDate: 2017-12-27T03:50:30.198323-05:
      DOI: 10.1002/ctpp.201700106
       
  • Characteristics of an atmospheric-pressure radio frequency-driven Ar/H2
           plasma discharge with copper wire in tube
    • Authors: Q.J. Guo; G.H. Ni, L. Li, Q.F. Lin, P. Zhao, Y.D. Meng, Y.J. Zhao, S.Y. Sui
      Abstract: This paper investigates a plasma discharge driven by a 13.56 MHz radio frequency (RF) power supply at atmospheric pressure, in which a copper wire is inserted in the discharge tube for the deposition of Cu films. The results show that the jet plasma formation originates from the discharge between the copper wire and induction coil because of its electrostatic field. The axial distribution of the plasma parameters in the RF plasma jet, namely the gas temperature, excitation temperature, and electron number density, is determined by diatomic molecule OH fitting, Boltzmann slope, and Hβ Stark broadening, respectively. The discharge current significantly declines when a small amount of hydrogen is added to the argon as the plasma-forming gas, and the gas temperature of discharge plasma increases considerably.
      PubDate: 2017-12-27T03:37:50.770929-05:
      DOI: 10.1002/ctpp.201700015
       
  • Local structure in dense hydrogen at the liquid–liquid phase transition
           by coupled electron–ion Monte Carlo
    • Authors: Carlo Pierleoni; Markus Holzmann, David M. Ceperley
      Abstract: We present a study of the local structure of high-pressure hydrogen around the liquid–liquid transition line based on results from the coupled electron–ion Monte Carlo method. We report results for the equation of state and for the radial distribution function between protons g(r) and results from a cluster analysis to detect the possible formation of stable molecular ions beyond the transition line as well as above the critical temperature. We discuss various estimates for the molecular fraction in both phases and show that, although the presence of H3+ ions is suggested by the form of the g(r), they are not stable against thermal fluctuations.
      PubDate: 2017-12-27T03:37:16.362817-05:
      DOI: 10.1002/ctpp.201700184
       
  • Experimental observation of dust circulation in unmagnetized cogenerated
           dusty plasma
    • Authors: Malay Mondal; Sanjib Sarkar, S. Mukherjee, M. Bose
      Abstract: The vortex motion of a dust cloud was experimentally observed in unmagnetized cogenerated dusty plasma in different experimental parameters. Particle image velocimetry analysis demonstrated that several vortex zones exist in the dust cloud at relatively low pressures (0.06 mbar (or 6 Pa)–0.08 mbar (or 8 Pa)) and low discharge voltages (peak-to-peak voltage 540–560 V), whereas in relatively high pressure (0.4 mbar (or 40 Pa)–0.7 mbar (or 70 Pa)) and high discharge voltage (peak-to-peak voltage 690–740 V), dust vortices formed in dense dust cloud with background plasma fluctuation.
      PubDate: 2017-12-19T02:51:00.981733-05:
      DOI: 10.1002/ctpp.201700039
       
  • Classical ion–grain scattering in plasmas: Image force correction
    • Authors: N.Kh. Bastykova; S.K. Kodanova, T.S. Ramazanov, Zh.A. Moldabekov
      Abstract: Corrections to the classical ion–grain scattering and capture cross-sections due to polarization charges on the dust particle, which acts as an image charge, have been obtained for a low-charged grain (with the charge number Z = 10). The trajectory of the ion around the dust particle is used for visual illustration of the influence of the grain polarization on scattering. The correction to the scattering cross-section due to the image force can be as large as 25% in the strong ion–grain coupling regime and up to 10% in the moderately coupled case. The correction to the capture cross-section turns out to be nearly constant (∼14%) for moderate as well as strong ion–grain coupling.
      PubDate: 2017-12-19T02:35:35.225868-05:
      DOI: 10.1002/ctpp.201700144
       
  • On the instability in the bilayer electron–hole plasma
    • Authors: Vladimir Babichenko; Ilya Polishchuk, Elena Tsyvkunova
      Abstract: We consider here the multi-flavour electron–hole plasma formed with the charges of opposite signs separated spatially in a bilayer. The temperature of the system is assumed to be smaller than the degenerate temperature of both the electrons and holes. It is found that, if the charge density is sufficiently small, the system has a negative compressibility, and the homogeneous in-layer charge distribution is thermodynamically unstable. As a result, the system breaks down into 2 co-existing phases, the denser one being an electron–hole liquid. New sound excitation branch, inherent in the multi-flavour 2-dimensional plasma, proves to be unstable exactly for the same density region in which the system is thermodynamically unstable. As the inter-layer distance increases, the plasmon spectrum of the electron–hole liquid becomes softer for finite momenta. Once the dispersion curve for the plasmon spectrum crosses the momentum axis, the plasmon spectrum becomes unstable. As a result, the system experiences a quantum phase transition leading to the formation of a charge density wave.
      PubDate: 2017-12-07T03:00:42.933496-05:
      DOI: 10.1002/ctpp.201700107
       
  • Behaviour of two-dimensional liquid dusty plasmas under perpendicular
           magnetic fields
    • Authors: Qiaoling Wang; Kang Wang, Yan Feng
      Abstract: The collective behaviour of two-dimensional (2D) liquid dusty plasmas under perpendicular magnetic fields is studied using Langevin dynamic simulations. Based on the positions and velocities of the simulated dust particles, the dynamic parameters of intermediate scattering functions and probability distribution functions are calculated. It is found that, under different 2D liquid dusty plasma conditions, the motion of individual dust particles tends to be more super-diffusive under stronger perpendicular magnetic fields, well consistent with the previous finding using a different diagnostic technique.
      PubDate: 2017-12-07T02:36:44.034761-05:
      DOI: 10.1002/ctpp.201700097
       
  • On the convergence issues of the block-average method for the melting of
           two-dimensional confined systems
    • Authors: Assia Bessaa; Mourad Djebli
      Abstract: The auto-correlation between blocks in Monte Carlo simulations may present another typical problem for the convergence of the block-average method used to predict the melting of small confined systems. We suggest a simple statistical way to avoid this problem for different packing configurations.
      PubDate: 2017-12-01T03:15:37.756559-05:
      DOI: 10.1002/ctpp.201700128
       
  • Average-atom model calculations of dense-plasma opacities: Review and
           potential applications to white-dwarf stars
    • Authors: R. Piron; T. Blenski
      Abstract: Methods using average-atom models in order to calculate dense-plasma opacities and conductivities are reviewed. Dense plasmas at moderate temperatures, of interest in white-dwarf modelling, are considered. Due to their relative simplicity of implementation, compared to more detailed models (detailed-level accounting, detailed configuration accounting, etc.), average-atom models are a privileged framework for the application of the most involved dense-plasma statistical modelling. Moreover, the average-atom models are well suited to the calculation of some thermodynamic properties, such as the equation of state. They can also be used in order to estimate broadband radiative properties of dense plasmas. After an introduction to the opacity issue in the modelling of white dwarfs, we make a short review of average-atom models. We then address the methods of calculating the opacity starting from the average-atom model, see some of their limitations, and briefly discuss some problems that remain open, such as the modelling of fluctuations, or the accounting for channel mixing and collective phenomena in the photoabsorption.
      PubDate: 2017-11-28T02:01:23.320326-05:
      DOI: 10.1002/ctpp.201700095
       
  • Dispersion of kinetic Alfvén wave in a rotating plasma with an
           inhomogeneous magnetic field
    • Authors: Y. Liu; Y. Teng
      Abstract: The effects of inhomogeneity of a magnetic field on the dispersion of kinetic Alfvén waves (KAWs) in a rotating plasma is investigated under the framework of magnetohydrodynamic theory. The magnetic field should be in a non-uniform state if the centrifugal force is balanced only by the magnetic pressure. The inhomogeneity of the magnetic field increases the frequency of KAW and drives it into an unstable state. The growth rate of KAW varies non-monotonously with respect to the distance. The KAW will be excited in a certain region with maximum growth rate. And the growth rate of KAW in the region near and far from the centre of rotation approaches zero. These results will be helpful in understanding the properties of KAWs in rotating astrophysical and laboratory plasmas.
      PubDate: 2017-11-28T01:56:50.007707-05:
      DOI: 10.1002/ctpp.201700057
       
  • Design and optical study of a microwave plasma torch in nitrogen used for
           the evaporation of aluminium wires
    • Authors: A.V. Pipa; D. Sushentsev, S. Hamann, C. Dufloux, Yu.Z. Ionikh, M. Hannemann, M. Wiese, J. Röpcke, J. Wollweber
      Abstract: A microwave torch in nitrogen has been designed for the evaporation of aluminium (Al) wires potentially to be used for the synthesis of aluminium nitride (AlN). The torch, created on the tip of a metallic nozzle, is compatible with vacuum conditions and can be operated in continuous mode up to atmospheric pressure. Al wires to be evaporated are fed through the axis of the nozzle. Time-resolved photography is applied to analyse the time evolution and stability of the interaction of the Al wire with the discharge. Optical emission spectroscopy is used (a) for the determination of the gas temperature of the active discharge, which is found to be in the range 1500–3500 K depending on the experimental conditions, and (b) for the estimation of the densities of Al and N atoms in the afterglow region, which are in the range 1011–1012 and of 1013–1014 cm−3, respectively. It is found that the part of the Al wire that is directly exposed to the nitrogen torch absorbs a considerable amount of the microwave energy, supporting its evaporation. In addition, the dissociation of molecular nitrogen has to be considered as an important process of power dissipation. Further technical development of the torch is necessary for the envisaged synthesis of AlN.
      PubDate: 2017-11-28T01:31:34.596647-05:
      DOI: 10.1002/ctpp.201700112
       
  • Effective charge of a macroparticle in a non-isothermal plasma within the
           Poisson–Boltzmann model
    • Authors: A.I. Momot
      Abstract: The electrostatic potential distribution around a charged, spherical, finite-size macroparticle in a non-isothermal plasma-like medium is studied numerically within the Poisson–Boltzmann model. It is assumed that plasma consists of electrons and one species of singly charged ions. The effective charge of a macroparticle is calculated and its dependence on the electron to ion temperature ratio as well as on the particle radius and bare charge is considered. Numerical results for the effective charge in an isothermal plasma are compared with known analytical expressions.
      PubDate: 2017-11-28T01:10:42.926466-05:
      DOI: 10.1002/ctpp.201700074
       
  • Floating double probe in non-Maxwellian plasmas: Determination of the
           electron density and mean electron energy
    • Authors: J.L. Jauberteau; I. Jauberteau
      Abstract: A theoretical study of the floating double probe based on the Druyvesteyn theory is developed in the case of non-Maxwellian electron energy distribution functions (EEDFs). It is used to calculate the EEDF in the electron energy range larger than –e(Vf − Vp) from the I–V double probe characteristics. Vf and Vp are the floating and plasma potential, respectively. The analytical distribution function corresponding to the best fit of EEDF in the energy range larger than e(Vf − Vp) allows the determination of the total electron density (ne) and the mean electron energy (). The method is detailed and tested in the case of a theoretical Maxwell–Boltzmann distribution function. It is applied for experiments that are performed in expanding microwave plasmas sustained in argon. Analytical EEDFs determined by this method are compared with those measured by means of single probes under the same experimental conditions. A good agreement is observed between single and double probe measurements. Results obtained under different experimental conditions are used to define the best conditions to obtain reliable results by means of the double probe technique.
      PubDate: 2017-11-23T01:51:47.040666-05:
      DOI: 10.1002/ctpp.201700046
       
  • Ab initio results for the static structure factor of the warm dense
           electron gas
    • Authors: Tobias Dornheim; Simon Groth, Michael Bonitz
      Abstract: The uniform electron gas at finite temperature is of high current interest for warm dense matter research. The complicated interplay of quantum degeneracy and Coulomb coupling effects is fully contained in the pair distribution function or, equivalently, the static structure factor. By combining exact quantum Monte Carlo results for large wave vectors with the long-range behaviour from the Singwi-Tosi-Land-Sjölander approximation, we are able to obtain highly accurate data for the static structure factor over the entire k-range. This allows us to gauge the accuracy of previous approximations and discuss their respective shortcomings. Further, our new data will serve as valuable input for the computation of other quantities.
      PubDate: 2017-11-17T05:00:43.993145-05:
      DOI: 10.1002/ctpp.201700096
       
  • Nonlinear ion-acoustic cnoidal wave in electron-positron-ion plasma with
           nonextensive electrons
    • Authors: Forough Farhadkiyaei; Davoud Dorranian
      Abstract: Effects of plasma nonextensivity on the nonlinear cnoidal ion-acoustic wave in unmagnetized electron-positron-ion plasma have been investigated theoretically. Plasma positrons are taken to be Maxwellian, while the nonextensivity distribution function was used to describe the plasma electrons. The known reductive perturbation method was employed to extract the KdV equation from the basic equations of the model. Sagdeev potential, as well as the cnoidal wave solution of the KdV equation, has been discussed in detail. We have shown that the ion-acoustic periodic (cnoidal) wave is formed only for values of the strength of nonextensivity (q). The q allowable range is shifted by changing the positron concentration (p) and the temperature ratio of electron to positron (σ). For all of the acceptable values of q, the cnoidal ion-acoustic wave is compressive. Results show that ion-acoustic wave is strongly influenced by the electron nonextensivity, the positron concentration, and the temperature ratio of electron to positron. In this work, we have investigated the effects of q, p, and σ on the characteristics of the ion-acoustic periodic (cnoidal) wave, such as the amplitude, wavelength, and frequency.
      PubDate: 2017-11-17T04:51:28.512015-05:
      DOI: 10.1002/ctpp.201600076
       
  • Ionization potential depression and optical spectra in a Debye plasma
           model
    • Authors: Chengliang Lin; Gerd Röpke, Heidi Reinholz, Wolf-Dietrich Kraeft
      Abstract: We show how optical spectra in dense plasmas are determined by the shift of energy levels as well as by the broadening due to collisions with the plasma particles. In the lowest approximation, the interaction with the plasma particles is described by the random phase approximation (RPA) dielectric function, leading to the Debye shift of the continuum edge. The bound states remain nearly un-shifted, and their broadening is calculated in the Born approximation. The roles of ionization potential depression as well as the Inglis–Teller effect are shown. The model calculations have to be improved going beyond the lowest (RPA) approximation when applying to warm dense matter spectra.
      PubDate: 2017-11-17T04:51:06.085306-05:
      DOI: 10.1002/ctpp.201700114
       
  • Gradient correction and Bohm potential for two- and one-dimensional
           electron gases at a finite temperature
    • Authors: Zh.A. Moldabekov; M. Bonitz, T.S. Ramazanov
      Abstract: From the static polarization function of electrons in the random phase approximation, the quantum Bohm potential for the quantum hydrodynamic description of electrons and the density gradient correction to the Thomas–Fermi free energy at a finite temperature for the two- and one-dimensional cases are derived. The behaviour of the Bohm potential and of the density gradient correction as a function of the degeneracy parameter is discussed. Based on recent developments in the fluid description of quantum plasmas, the Bohm potential for the high-frequency domain is presented.
      PubDate: 2017-11-09T04:35:50.074582-05:
      DOI: 10.1002/ctpp.201700113
       
  • Pauli blocking by effective pair pseudopotential in degenerate Fermi
           systems of particles
    • Authors: A.S. Larkin; V.S. Filinov, V.E. Fortov
      Abstract: An explicit analytical expression of the Wigner function has been proposed to account for Fermi statistical effects using an effective pair pseudopotential in phase space. The derived pseudopotential depends on coordinates, momenta, and the degeneracy parameter of fermions and takes into account Pauli blocking of fermions in phase space. A new quantum Monte Carlo method (WPIMC) is put forward to calculate average values of arbitrary quantum operators in phase space. When calculated using the WPIMC method, the momentum distributions and pair distribution functions for degenerate ideal fermions are in good agreement with the analytical distribution over a wide range of values of the degeneracy parameter. Generalization of this approach for treating strongly correlated fermions is in progress.
      PubDate: 2017-11-09T04:35:27.059233-05:
      DOI: 10.1002/ctpp.201700082
       
  • Planetary physics research programme at the Facility for Antiprotons and
           Ion Research at Darmstadt
    • Authors: N.A. Tahir; I.V. Lomonosov, B. Borm, A.R. Piriz, P. Neumayer, A. Shutov, V. Bagnoud, S.A Piriz
      Abstract: Planetary physics research is an important part of the high energy density (HED) physics programme at the Facility for Antiprotons and Ion Research (FAIR) at Darmstadt. In this paper, we report numerical simulations of a proposed experiment named LAboratory PLAnetary Sciences (LAPLAS). These simulations show that in such experiments, an Fe sample can be imploded to extreme physical conditions that are expected to exist in the interior of the Earth and in the interior of more massive rocky planets named, super-Earths. The LAPLAS experiments will thus provide very valuable information on the equation-of-state (EOS) and transport properties of HED Fe, which will help the scientists to understand the structure and evolution of the planets in our solar system and of the extrasolar system planets.
      PubDate: 2017-11-03T00:20:33.735482-05:
      DOI: 10.1002/ctpp.201700076
       
  • The pressure, internal energy, and conductivity of tantalum plasma
    • Authors: E.M. Apfelbaum
      Abstract: The pressure, internal energy, and conductivity of a tantalum plasma were calculated at the temperatures 10–100 kK and densities less than 3 g/cm3. The plasma composition, pressure, and internal energy were obtained by means of the corresponding system of the coupled mass action law equations. We have considered atom ionization up to +3. The conductivity was calculated within the relaxation time approximation. Comparisons of our results with available measurements and calculation data show good agreement in the area of correct applicability of the present model.
      PubDate: 2017-10-25T04:16:44.716845-05:
      DOI: 10.1002/ctpp.201700083
       
  • Strongly coupled fine particle clouds in fine particle (dusty) plasmas
    • Authors: Hiroo Totsuji
      Abstract: Based on drift-diffusion equations, we show a large enhancement of the charge neutrality in fine particle clouds analytically and confirm it by numerical solutions, in both cases of microgravity and gravity. This observation enables us to construct simple models of fine particle clouds in both cases. Combined with the analysis of the Helmholtz free energy of inhomogeneous systems, our results give a formulation to obtain microscopic structures of fine particles in fine particle clouds.
      PubDate: 2017-10-25T04:16:00.070206-05:
      DOI: 10.1002/ctpp.201700088
       
  • High energy density matter issues related to Future Circular Collider:
           Simulations of full beam impact with a solid copper cylindrical target
    • Authors: N.A. Tahir; F. Burkart, R. Schmidt, A. Shutov, D. Wollmann, A.R. Piriz
      Abstract: This paper presents numerical simulations of the thermodynamic and hydrodynamic response of a solid copper cylindrical target that is subjected to the full impact of one future circular collider (FCC) ultra-relativistic proton beam. The target is facially irradiated so that the beam axis coincides with the cylinder axis. The simulations have been carried out employing an energy deposition code, FLUKA, and a 2D hydrodynamic code, BIG2, iteratively. The simulations show that, although the static range of a single FCC proton and its shower in solid copper is ∼1.5 m, the full beam may penetrate up to 350 m into the target as a result of hydrodynamic tunnelling. Moreover, simulations also show that a major part of the target is converted into high energy density (HED) matter, including warm dense matter (WDM) and strongly coupled plasma.
      PubDate: 2017-10-06T05:25:48.398015-05:
      DOI: 10.1002/ctpp.201700075
       
  • Sound speed and diffusion in 2D Yukawa liquids: Effect of
           dipole–dipole interaction
    • Authors: Ayatola Zh. Gabdulin; Tlekkabul S. Ramazanov, Zhandos A. Moldabekov
      Abstract: The two-dimensional (2D) Yukawa liquid with an additional screened dipole–dipole interaction is considered in connection with the 2D system of charged dust particles in complex plasmas. Particularly, the sound speed and diffusion in the case the Yukawa interaction potential dominant over the screened dipole–dipole interaction are analysed. Increase in the value of the sound speed and suppression of the super-diffusion due to the additional dipole–dipole interaction are reported. This effect is explained by the stronger inter-particle correlations induced by the additional dipole–dipole interaction.
      PubDate: 2017-10-06T05:20:31.609764-05:
      DOI: 10.1002/ctpp.201700068
       
  • Recent microgravity experiments with complex direct current plasmas
    • Authors: C. Dietz; M. Kretschmer, B. Steinmüller, M.H. Thoma
      Abstract: Complex plasmas are low-temperature plasmas containing micrometer-sized particles. They are useful as models for strongly coupled many-body systems. Since the microparticles are strongly affected by gravity, microgravity experiments with complex plasmas are conducted. Here we report on recent microgravity experiments with the experimental facility PK-4 performed in parabolic flights. In particular, we discuss electrorheological and demixing experiments and the image analysis tools used.
      PubDate: 2017-10-06T05:15:56.0281-05:00
      DOI: 10.1002/ctpp.201700055
       
  • Cover Picture: Contrib. Plasma Phys. 10/2017
    • Pages: 423 - 423
      Abstract: Momentum distribution n(k) for the unpolarized electron gas with square lattice geometry in two dimensions with system sizes up to one million of electrons. Figures 3 of the paper by B. Bernu et al.
      PubDate: 2017-12-27T00:19:22.923795-05:
      DOI: 10.1002/ctpp.201790025
       
  • Issue Information: Contrib. Plasma Phys. 10/2017
    • Pages: 424 - 427
      PubDate: 2017-12-27T00:19:22.584792-05:
      DOI: 10.1002/ctpp.201790026
       
  • International Conference “Strongly Coupled Coulomb Systems” Kiel,
           Germany (July 30th–August 4th, 2017)
    • Pages: 428 - 433
      PubDate: 2017-12-27T00:19:23.873077-05:
      DOI: 10.1002/ctpp.201790027
       
  • A tribute to Dietrich Kremp
    • Authors: Th. Bornath; W.-D. Kraeft, R. Redmer, G. Röpke, M. Schlanges, W. Ebeling, M. Bonitz
      Pages: 434 - 440
      Abstract: Dietrich Kremp (1937–2017) made important contributions to statistical physics, especially quantum statistics, plasma physics, and the physics of electrolytes. He was a recognized member of the strongly coupled Coulomb systems and non-ideal plasmas communities, and his text books continue to have a profound influence on these fields.
      PubDate: 2017-12-27T00:19:23.655123-05:
      DOI: 10.1002/ctpp.201700150
       
  • Max Planck and Albrecht Unsöld on plasma partition functions and
           lowering of ionization energy
    • Authors: W. Ebeling
      Pages: 441 - 451
      Abstract: We summarize the work devoted to plasma thermodynamics and ionization theory performed by two protagonists working at Kiel University: Max Planck and Albrecht Unsöld. First we show that Planck developed, in Kiel, the basis for describing the chemical equilibria between charged particles (ions) and formulated later, in Berlin, the first complete version of the theory of ionization equilibria in plasmas with a convergent partition function. Abrecht Unsöld studied, in Kiel, the influence of plasma density on the atomic partition function, investigating the electric microfield between the ions. He showed that this effect leads to a lowering of the ionization energy going with the cubic root of the density. Finally, we discuss briefly recent theoretical and experimental work on the ionization potential depression.
      PubDate: 2017-12-27T00:19:20.67301-05:0
      DOI: 10.1002/ctpp.201700094
       
  • Optical reflectivity based on the effective interaction potentials of
           xenon plasma
    • Authors: E.O. Shalenov; S. Rosmej, H. Reinholz, G. Röpke, K.N. Dzhumagulova, T.S. Ramazanov
      Pages: 486 - 492
      Abstract: New results on the reflectivity and Brewster angle of dense xenon plasmas based on of the effective interaction potentials (which take into account static and dynamic screening effects) at pressures of 1.6–20 GPa and temperatures of ∼30,000 K are presented. Using Fresnel formulas, the reflectivity coefficients for the s- and p-polarized laser waves are investigated. The influence of atoms, which was taken into account at the level of collision frequency via an effective interaction potential, is proven to be crucial for understanding the reflection process.
      PubDate: 2017-12-27T00:19:21.893754-05:
      DOI: 10.1002/ctpp.201700104
       
  • Enhancement of nuclear reaction rates in asymmetric binary ionic mixtures
    • Authors: J. Clérouin; P. Arnault, N. Desbiens, A. White, C. Ticknor, J.D. Kress, L.A. Collins
      Pages: 512 - 517
      Abstract: Using orbital-free molecular dynamics simulations we study the structure and dynamics of increasingly asymmetric mixtures such as hydrogen–carbon, hydrogen–aluminium, hydrogen–copper, and hydrogen–silver. We show that, whereas the heavy component structure is close to an effective one-component plasma (OCP), the light component appears more structured than the corresponding OCP. This effect is related to the crossover towards a Lorentz-type diffusion triggered by strongly coupled, highly charged heavy ions, and witnessed by the change of temperature scaling laws of diffusion. This over-correlation translates into an enhancement of nuclear reaction rates much higher than its classical OCP counterpart.
      PubDate: 2017-12-27T00:19:23.213551-05:
      DOI: 10.1002/ctpp.201700090
       
  • Periodic ground states of the electron gas in two and three dimensions
    • Authors: B. Bernu; F. Delyon, Lucas Baguet, Markus Holzmann
      Pages: 524 - 531
      Abstract: In this paper, we review the possibility of periodic ground states of the two- and three-dimensional electron gas at high and intermediate densities. At the Hartree–Fock level, we obtain explicit solutions at all densities having lower energies than the homogeneous Fermi gas. In the high-density region, the electrons only partially fill up the band approaching spin density waves as predicted by Overhauser. Preliminary variational Monte Carlo calculations on the polarized two-dimensional electron gas confirm the existence of these new types of ground states.
      PubDate: 2017-12-27T00:19:20.114981-05:
      DOI: 10.1002/ctpp.201700139
       
  • Ion potential in non-ideal dense quantum plasmas
    • Authors: Zh.A. Moldabekov; S. Groth, T. Dornheim, M. Bonitz, T.S. Ramazanov
      Pages: 532 - 538
      Abstract: The screened ion potential in non-ideal dense quantum plasmas is investigated by invoking the Singwi–Tosi–Land–Sjölander approximation for the electronic local field correction at densities rs ≲ 2 and degeneracy parameters θ ≲ 1, where rs is the ratio of the mean inter-particle distance to the first Bohr radius, and θ is the ratio of the thermal energy to the Fermi energy of the electrons. Various cross-checks with ion potentials obtained from ground-state quantum Monte Carlo data, the random phase approximation, and with existing analytical models are presented. Furthermore, the importance of the electronic correlation effects for the dynamics in strongly coupled ionic subsystems for 0.1 ≤ rs ≤ 2 is discussed.
      PubDate: 2017-12-27T00:19:22.118734-05:
      DOI: 10.1002/ctpp.201700109
       
 
 
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