Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

PHYSICS (625 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 36)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 7)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Engineering and Applied Physics     Open Access  
International Journal of Fatigue     Hybrid Journal   (Followers: 41)
International Journal of Fracture     Hybrid Journal   (Followers: 14)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 41)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 17)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 2)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 14)
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 7)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 11)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 7)
International Journal of Microwave Science and Technology     Open Access   (Followers: 12)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 3)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 15)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 13)
International Journal of Multiphysics     Open Access  
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal  
International Journal of Nanotechnology     Hybrid Journal   (Followers: 9)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal   (Followers: 6)
International Journal of Physics     Open Access   (Followers: 10)
International Journal of PIXE     Hybrid Journal  
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 6)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal  
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
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: 17)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 18)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
International Materials Reviews     Hybrid Journal   (Followers: 15)
Iranian Journal of Medical Physics     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 4)
Izvestiya, Atmospheric and Oceanic Physics     Full-text available via subscription   (Followers: 1)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Jambura Physics Journal     Open Access  
JETP Letters     Hybrid Journal   (Followers: 3)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 13)
Journal of Advances in Physics     Open Access   (Followers: 13)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 9)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 69)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Astrophysics     Open Access   (Followers: 33)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 58)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 15)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 243)
Journal of Computational and Theoretical Transport     Hybrid Journal   (Followers: 2)
Journal of Computational Methods in Physics     Open Access   (Followers: 8)
Journal of Computational Physics     Hybrid Journal   (Followers: 59)
Journal of Computational Physics : X     Open Access   (Followers: 1)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 9)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 14)
Journal of Elasticity     Hybrid Journal   (Followers: 7)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 3)
Journal of Electronic Materials     Hybrid Journal   (Followers: 3)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 17)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 2)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 4)
Journal of Experimental Physics     Open Access   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 6)
Journal of Geometry and Physics     Full-text available via subscription   (Followers: 2)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 135)
Journal of Gravity     Open Access   (Followers: 4)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 25)
Journal of High Energy Physics     Hybrid Journal   (Followers: 17)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access   (Followers: 2)
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 23)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 8)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 14)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 8)
Journal of Luminescence     Hybrid Journal   (Followers: 2)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 22)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Science     Hybrid Journal   (Followers: 25)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 2)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 1)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 10)
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: 24)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 6)
Journal of Motor Behavior     Hybrid Journal   (Followers: 8)
Journal of Multiscale Modeling     Hybrid Journal   (Followers: 1)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Dynamics     Open Access   (Followers: 6)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 2)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 6)
Journal of Optics     Hybrid Journal   (Followers: 17)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 2)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Hybrid Journal   (Followers: 48)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 36)
Journal of Physical Oceanography     Hybrid Journal   (Followers: 18, SJR: 2.461, CiteScore: 3)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 8)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Plasma Physics     Hybrid Journal   (Followers: 21)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 22)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 1)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 3)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Rheology     Full-text available via subscription   (Followers: 7)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 4)
Journal of Scientific Research     Open Access  
Journal of Sensors     Open Access   (Followers: 25)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Physics     Open Access   (Followers: 8)
Journal of Spectroscopy     Open Access   (Followers: 6)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Open Access   (Followers: 3)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 32)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of the Physical Society of Japan     Hybrid Journal   (Followers: 2)
Journal of Theoretical and Applied Physics     Open Access   (Followers: 9)
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: 42)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University : Sceince A     Hybrid Journal  
JPSE (Journal of Physical Science and Engineering)     Open Access  
Jurnal Fisika     Open Access  
Jurnal Ilmiah Pendidikan Fisika Al-Biruni     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Online of Physics     Open Access  
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access  
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kasuari : Physics Education Journal     Open Access  
La Rivista del Nuovo Cimento     Hybrid Journal  
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Letters in High Energy Physics     Open Access  
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access   (Followers: 3)
Living Reviews in Computational Astrophysics     Open Access   (Followers: 3)
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 1)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 5)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 2)
Magnetic Resonance     Open Access  
Magnetic Resonance Letters     Open Access  
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 31)
Matéria (Rio de Janeiro)     Open Access  
Materials and Design     Open Access   (Followers: 47)
Materials at High Temperatures     Full-text available via subscription   (Followers: 3)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Research Bulletin     Hybrid Journal   (Followers: 25)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 7)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 44)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 22)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 15)
Materials Science and Technology     Hybrid Journal   (Followers: 40)
Materials Today Physics     Hybrid Journal   (Followers: 1)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 3)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access   (Followers: 1)
Meccanica     Hybrid Journal   (Followers: 1)
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 6)
Mechanics of Materials     Hybrid Journal   (Followers: 25)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 4)
Medical Physics     Hybrid Journal   (Followers: 17)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 11)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Instrumentation     Open Access   (Followers: 57)
Modern Physics Letters A     Hybrid Journal   (Followers: 14)

  First | 1 2 3 4 | Last

Similar Journals
Journal Cover
Journal of Experimental and Theoretical Physics
Journal Prestige (SJR): 0.437
Citation Impact (citeScore): 1
Number of Followers: 4  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1090-6509 - ISSN (Online) 1063-7761
Published by Springer-Verlag Homepage  [2469 journals]
  • On the Conductivity of the 2D Rayleigh Model in the Region of the
           Metal–Insulator Phase Transition

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      Abstract: The conductivity of the 2D Rayleigh model in the critical region (near the metal–insulator phase transition point) is considered. The analytic expression describing effective conductivity σe of the model is derived for the entire pre-threshold critical region (up to the contact of circular inclusions). The data obtained for σe expansions are compared with the relevant results of the similarity hypothesis.
      PubDate: 2022-03-01
       
  • Simulation of the LSD Response to the Neutrino Burst from SN 1987A

    • Free pre-print version: Loading...

      Abstract: Using the Geant4 code, we have performed a full-scale simulation of the LSD response to the neutrino burst from SN 1987A. The neutrino flux parameters were chosen according to one of the models: the standard collapse model or the rotational supernova explosion model. We showed that, depending on the chosen parameters, one can either obtain the required number of pulses in the detector or reproduce their energy spectrum, but not both together. The interaction of neutrino radiation both with LSD itself and with the material of the surrounding rock was taken into account in our simulation. We also explored the hypothesis that the entire unique LSD signal at 2:52 UT was produced by neutrino fluxes from the surrounding granite. However, this hypothesis was not confirmed by our simulation. The results obtained provide a rich material for possible interpretations.
      PubDate: 2022-03-01
       
  • Elastoplastic and Polymorphic Transformations in Iron Films Loaded by
           Ultrashort Laser Shock Waves

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      Abstract: The results of experimental studies of the laser shock waves initiated by a picosecond pulse in iron are presented. Experimental measurements are processed and analyzed using theoretical approaches and numerical simulation. Interest in picosecond actions is caused by uniquely high strain rates, in particular, the dependence of the thresholds of elastoplastic and polymorphic transformations on the strain rate. Investigations are necessary for the development of the field of laser hardening of metals. The first steps in this direction have been taken, although this kind of approach to laser forging hardening is already widely used in practice. Modern developments in the field of shock wave generation and their experimental diagnostics are used, and the related methods of theoretical interpretation of experimental data are being developed. The difficulty lies in the picosecond time scale, since the diagnostics of experiments is limited by kinematics, namely, measuring the coordinates of the free surface. To elucidate the polymorphic transformation kinetics on picosecond time scales, the technique of inverse analysis of the free surface velocity is used for the first time. This technique is validated using the results of hydrodynamic and molecular dynamics simulation with direct extraction of mechanical stresses and strains. A theoretical study of reconstructed free surface velocity profiles by traditional methods confirms the results obtained in the field of their applicability, specifically, on elastic and plastic shock wave fronts. The transformation of iron into the ε phase takes place in the initial region of shock wave propagation, as long as a shock wave has a sufficient amplitude. The cause is a pressure limitation of 40 GPa because of optical breakdown in glass and shock wave attenuation during wave propagation.
      PubDate: 2022-03-01
       
  • Formation of Self-Energy Singularities by Thermal Fluctuations of the
           Superconducting Order Parameter

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      Abstract: We investigate the structure of the energy dependence of the normal and anomalous self-energy components of the one-particle Green function in the superconducting state, which is calculated with account for charge carrier scattering by thermal fluctuations of electron–hole pairs. Analysis is performed using the self-consistent theory of continual integration based on the quasi-two-dimensional single-band model with attraction between electrons at neighboring sites. Asymptotic expressions for the self-energy components, which coincide in structure with analogous expressions of the phenomenological model of hybridization of electrons with hidden fermionic excitations, are obtained in the average t-matrix approximation. Analysis of the results shows that the energy dependences of both self-energy components have characteristic peaks that suppress each other in the total self-energy at low temperatures. Such a behavior is preserved in the range of anomalously low temperatures and disappears only in the quantum limit for T → 0, in which quantum fluctuations play the decisive role. With increasing temperature, the mutual suppression is replaced by mutual enhancement followed by mutual compensation in the range of temperatures close to the superconducting transition temperature.
      PubDate: 2022-03-01
       
  • Probing BBP Transition by Dimensional Reduction

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      Abstract: We consider the microcanonical ensemble of random paths of fixed length, N, in the vicinity of a semi-permeable disc boundary. Varying the penetration probability, η, through the boundary from weakly penetrating (0 < η ≪ 1) to strongly penetrating (η → 1) regimes, we observe the “Baik–Ben Arous–Péché” (BBP) transition which manifests itself in the change of paths fluctuations in the direction perpendicular to the boundary. The span of fluctuations, Δ behaves as Δ(N) ~ N1/3 for 0 < η ≪ 1 and as Δ(N) ~ N1/2 for η → 1. We apply the method of the dimensionality reduction to analyze the statistics of ensemble of trajectories and identify the BBP transition with specific clustering pattern on a two-dimensional plane.
      PubDate: 2022-03-01
       
  • Poincare Waves and Rossby Waves in Compressible Shallow Water Flows

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      Abstract: The shallow water approximation is generalized for describing large-scale flow of a liquid in the gravity field with a free surface. The classical shallow water equations are an alternative to the solution of the complete system of hydrodynamics equations in the gravity force field; however, the classical approximation does not take into account the density nonuniformity of a liquid layer. We have analyzed the flow of a thin layer of a rotating liquid with a free surface with account for the compressibility effects. We have obtained a system of quasi-linear differential equations describing the flow of a compressible liquid in the shallow water approximation. The solutions to this system have been obtained in the form of linear Poincare waves on the f plane and the Rossby waves on the β plane in compressed flows. The nonlinear dynamics of the Rossby waves in compressible flows is analyzed using the method of multiscale expansions. The resulting three-wave equations for the amplitudes of interacting waves are analyzed for parametric instabilities, and their increments are determined.
      PubDate: 2022-03-01
       
  • Nonlinear Dynamics of the Atomic–Molecular Conversion of Alkali Metal
           Isotopes at Ultralow Temperatures

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      Abstract: We analyze the atomic–molecular conversion dynamics of a system of condensed lithium isotopes at ultralow temperatures. We have obtained exact analytic solutions that show the existence of aperiodic and periodic regimes of conversion of 6Li atoms and 6Li7Li molecules into the 6Li2 molecule and the 7Li atom in the strict resonance conditions. It is shown that the time evolution of atoms and molecules during stimulated conversion is determined by the initial phase difference.
      PubDate: 2022-03-01
       
  • Solution of the Self-Organized Critical Manna Model in Space Dimensions 2
           to 4

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      Abstract: The Manna model—the conservative isotropic self-organized critical sandpile model—is studied. The results of computer simulation in two-, three-, and four-dimensional formulations, as well as an analytical solution for space dimensions between the lower and upper critical dimensions, are presented for this model. The solution is based on the construction of a mesolevel model formulated in terms of the excitation density, its correlation length, and the average activity and the boundary width of the avalanche region. The indices are calculated by two independent methods: on the basis of the renormalization of stochastic differential equations and by reducing the occurring processes to random walks.
      PubDate: 2022-03-01
       
  • Structure of Metastable Sr0.8Dy0.2Co3 – δ Phases and Their Electrical
           and Magnetic Properties

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      Abstract: Polycrystalline Sr0.8Dy0.2Co3 – δ complex cobalt oxides with a different amount of oxygen (δ = 0.26, 0.44, 0.46) have been prepared by solid-state synthesis. An increase in oxygen deficiency causes the brownmillerite phase to appear in the perovskite structure, which significantly changes its properties. At δ = 0.46, the content of the brownmillerite phase reaches 38%. A comparative analysis of the magnetic and transport properties of synthesized samples has been carried out. The asymptotic Curie temperature changes sign from positive at δ = 0.26 to negative at δ = 0.46. The magnetoresistance of the sample with δ = 0.46 is negative and exceeds 40% at T = 10 K. The temperature dependence of resistivity is characteristic of semiconductors, and the absolute values for samples at low temperatures differ almost tenfold.
      PubDate: 2022-03-01
       
  • Prediction of the Relaxation Kinetics of the Shear Modulus of Metallic
           Glasses during Crystallization Using Calorimetric Measurements

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      Abstract: The method based on Granato’s interstitialcy theory, which allows us to calculate the temperature dependence of shear modulus G using experimental calorimetry data, has been successfully tested on a number of bulk metallic glasses. The results of prediction in a wide temperature range, including the crystallization of both initial and relaxed metallic glasses, are presented for the first time. The error in calculating the temperature dependence of the shear modulus of metallic glass during crystallization does not exceed 10%.
      PubDate: 2022-03-01
       
  • Bow Shock Eigenmodes and Their Interconnection with Magnetospheric
           Resonances

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      Abstract: Resonant modes with frequencies 0.02–10 mHz are detected from the bow shock (BS) to the outer magnetosphere, with the nature of the resonances at frequencies 0.02–0.25 mHz being still unexplained. We propose a BS model in the form of a circular plate free along the outer edge that predicts resonant modes at frequencies 0.02–0.3 mHz or lower. We demonstrate the detection of these model resonant modes based on data from five satellites, with the resonance near 0.1 mHz predicted by the model being observed in the magnetosheath continuously for 17 hours downstream of both parallel and perpendicular shocks. Resonant BS modes produce three-wave nonlinear cascades that realize a broadband coherent coupling with resonances both near and inside the magnetopause. In our opinion, it is the coherent nature of the processes in an extended region with different linear resonant eigenmodes that determines the fairly new, nonlinear-cascade, approach to an efficient conversion of the energy of an inflow when interacting with an obstacle. This seems important for the entire nonlinear physics. We also provide arguments suggesting the possibility of resonant mode self-generation in the closed BS/magnetopause loop with a feedback in the form of narrow Poynting vector pulses at the cost of solar wind energy.
      PubDate: 2022-03-01
       
  • Shock-Wave Pressure Transfer to a Solid Target with Porous Absorber of
           High-Power Laser Pulse

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      Abstract: Results of experiments aimed at amplification of the pressure of laser-induced shock wave on the passage from low- to high-density target material via vacuum gap are presented. During the action of nanosecond laser pulse of terawatt power on plane composite targets comprising a layer of laser radiation absorber of low-density (0.01–0.025 g/cm3) spaced by vacuum gap from a layer of aluminum, the shock-wave velocity in aluminum reached 25–29 km/s and a pressure jump at the aluminum layer boundary was 1.2–1.5 times as large as that observed in experiments on the cumulative transition of laser-induced shock wave into a solid. The obtained experimental data are compared to results of the numerical calculations performed using hydrodynamic programs in which the shock-wave generation and propagation was modeled with allowance for the interaction of laser pulses with partly homogenized plasma of the porous material. Based on the results of experiments, numerical calculations, and their theoretical analysis, the efficiency of using low-density porous media in the targets intended for their equation of state investigations and inertial confinement fusion ignition is considered.
      PubDate: 2022-03-01
       
  • Pseudoatom Molecular Dynamics Method for Calculating the Coefficients of
           Viscosity and Ion Self-Diffusion in a Dense Plasma

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      Abstract: A semiclassical version of the pseudoatom molecular dynamics method is used to calculate the coefficients of dynamic viscosity and ion self-diffusion of a warm and moderately heated dense plasma of a number of chemical elements, which are of interest for the high-energy-density physics, the solution of a number of applied geophysical and planetology problems, and a comparison with the calculated data of other authors. The effects caused by the Coulomb interaction in a medium and the quantum properties of the electronic subsystem of plasma are taken into account. Analytical approximations are proposed for the coefficients of viscosity and ion self-diffusion, and they can be used to simulate the dynamics of dense ionized matter for describing experiments in the high-energy-density physics.
      PubDate: 2022-03-01
       
  • Melting Point of Ti, Ti3Al, TiAl, and TiAl3 Nanoparticles Versus Their
           Diameter in Vacuum and Liquid Aluminum: Molecular Dynamics Investigation

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      Abstract: The dependence of the melting point of Ti, Ti3Al, TiAl, and TiAl3 nanoparticles on temperature in vacuum and an aluminum matrix has been studied using the molecular dynamics method. It has been found that the melting point of all nanoparticles drops with a decrease in their diameter, the decrease being proportional to the surface area/volume ratio. The melting points of Ti, Ti3Al, and TiAl nanoparticles in the aluminum matrix turn out to be lower than those of the same particles in vacuum. This is explained by interface smearing and disordering because of interdiffusion. For TiAl3 nanoparticles, the result is radically different: the aluminum sheath influences the melting point of the nanoparticle insignificantly in this case. As the diameter of the particles grows both in vacuum and in aluminum, their melting points tend to the same value. This is because when particles became coarser, interdiffusion smears the surface and it becomes to play a minor role.
      PubDate: 2022-02-01
       
  • Spinor Field Singular Functions in QED with Strong External Backgrounds

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      Abstract: We construct and study singular functions in strong-field QED with two external electromagnetic fields that represent principally different types of external backgrounds, the first one belongs to the class of so-called t-potential electric steps (electric-like fields that are switched on and off at initial and final time instants), and the second one belongs to the class of so-called x-potential electric steps (time-independent electric-like fields of constant direction that are concentrated in a restricted spatial area). As the first background (T-constant electric field) is an uniform electric field which acts during a finite time interval T, whereas as the second background (L-constant electric field) is a constant electric field confined between two capacitor plates separated by a large distance L. For the both cases we find in- and out-solutions of the Dirac equation in terms of light cone variables. With the help of these solutions, we construct Fock-Schwinger proper-time integral representations for all the singular functions that provide nonperturbative (with respect to the external backgrounds) calculations of any transition amplitudes and mean values of any physical quantities. Considering calculations in the T-constant field and in the L-constant field as different regularizations of the corresponding calculations in the constant uniform electric field, we have demonstrated their equivalence for sufficiently large T and L.
      PubDate: 2022-02-01
       
  • Differentiable Programming for Particle Physics Simulations

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      Abstract: We describe how to apply adjoint sensitivity methods to backward Monte Carlo schemes arising from simulations of particles passing through matter. Relying on this, we demonstrate derivative based techniques for solving inverse problems for such systems without approximations to underlying transport dynamics. We are implementing those algorithms for various scenarios within a general purpose differentiable programming C++17 library NOA (github.com/grinisrit/noa).
      PubDate: 2022-02-01
       
  • Averaging of Thermoelectric Media: Thermoelectric Potential Distribution

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      Abstract: We consider the problem of determining effective thermoelectric characteristics (namely, thermal and electrical conductivity, thermopower, and Q factor) of composite media. We assume that the characteristic size of inclusions is quite large (exceeds 20–30 nm), which makes it possible to disregard charge tunneling and photon scattering at the boundaries of various media. We investigate layered, fibrous, and granular composites. The choice of boundary conditions based on the Prigogine principle is substantiated in detail. By way of example, we analyze the properties of a composite medium consisting of a MgAg0.97Sb1 matrix with cylindrical or spherical SnSe inclusions.
      PubDate: 2022-02-01
       
  • Analysis of Cobalt Intercalation under the Buffer Carbon Layer on a
           SiC(0001) Single Crystal

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      Abstract: We analyze the synthesis of the buffer carbon layer on a SiC(0001) single crystal and its subsequent intercalation with cobalt atoms. It is shown using X-ray photoelectron spectroscopy that the intercalation is accompanied with the formation of a surface cobalt silicide alloy under the quasi-free graphene. The data measured using angle-resolved photoelectron spectroscopy demonstrate the presence of a Dirac cone near the Fermi level, which confirms the formation of quasi-free graphene as a result of intercalation. The morphology and homogeneity of the resulting system have been investigated using atomic force microscopy and Raman spectroscopy. The features of the graphene band structure on possible cobalt silicide alloys have been investigated using the density functional theory. The calculations of the chemical shift of the 2p level of Si for cobalt silicides confirm the presence of CoSi and CoSi2 components in X-ray photoelectron spectroscopy data. It is shown that the formation of quasi-free graphene with a linear dispersion of the π states is possible only on the CoSi surface. In view of the importance of investigation of graphene on insulating substrates as well as unique properties of graphene in contact with magnetic metals, we hope that this study will make a contribution to further realization of graphene in spintronics and nanoelectronics devices.
      PubDate: 2022-02-01
       
  • Problem of Increasing the Operating Frequency in Cherenkov Plasma Sources
           of Electromagnetic Radiation

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      Abstract: We analyze the possibility of increasing the operating frequency of available plasma Cherenkov microwave emitters operating on relativistic high-density electron beams. We consider high- and low-frequency surface waves of a high-density nonmagnetized tubular plasma in a waveguide and determine conditions for their pumping by electron beams. The coefficients of spatial amplification of surface waves in the regimes of one-particle and collective Cherenkov effects are calculated. Nonlinear equation of spatial enhancement of waves are derived, and the efficiencies of surface wave amplification are calculated. It is shown that an increase in the operating frequency of operating plasma emitters by an order of magnitude is quite feasible and can be attained by increasing only the density of the plasma.
      PubDate: 2022-02-01
       
  • Spin-Wave Excitations in NiFe/Cu/IrMn Heterostructures with a Variable
           Thickness Copper Spacer

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      Abstract: Spin waves in NiFe/Cu/IrMn heterostructures with a variable thickness copper spacer (tCu) have been studied by Mandelstam–Brillouin spectroscopy (Brillouin light scattering, BLS). The redistribution of contributions from grains with different sizes has been discovered, which causes a frequency shift of dispersion curves with varying Cu spacer thickness. In the case of magnetic field inversion, the resonance frequencies of Stokes and anti-Stokes lines shift. This shift characterizing the reverse bias value monotonically decreases with increasing tCu and completely disappears with the formation of a continuous Cu layer more than 1 nm thick. As the copper layer becomes thicker, the heterostructure becomes more uniform, as a result of which the energy density fluctuations of NiFe–IrMn exchange interaction smooth out and BLS spectral lines narrow.
      PubDate: 2022-02-01
       
 
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