Polarization Effects in Higher-order Guiding-center Lagrangian DynamicsThe extended guiding-center Lagrangian equations of motion are derived by Lie-transform method under the assumption of time-dependent and inhomogeneous electric and magnetic fields that satisfy the…Alain J. Brizard·Aug 8, 2023SaveLearn
Analysis of sample temperature dynamics under pulsed laser irradiation during laser-induced-desorption diagnosticThe accurate assessment of the local tritium concentration in the tokamak first wall by means of the laser-induced desorption (LID) diagnostic is sought as one the key solutions to monitoring the…A. A. Stepanenko, Yu. M. Gasparyan·Aug 8, 2023SaveLearn
Nonlinear Landau resonant interaction between whistler waves and electrons: Excitation of electron acoustic wavesElectron acoustic waves (EAWs), as well as electron-acoustic solitary structures, play a crucial role in thermalization and acceleration of electron populations in Earth's magnetosphere. These…Donglai Ma, Xin An, Anton Artemyev et al.·Aug 7, 2023SaveLearn
Collective ion dynamics in Coulomb one-component plasmas within the self-consistent relaxation theoryIn this paper, we present the theoretical formalism describing the collective ion dynamics of the nonideal Coulomb classical one-component plasmas on the basis of the self-consistent relaxation…Ilnaz I. Fairushin, Anatolii V. Mokshin·Aug 7, 2023SaveLearn
Colliding of two high Mach-number quantum degenerate plasma jetsColliding of two high Mach-number quantum degenerate plasmas is one of the most essential components in the double-cone ignition (DCI) inertial confinement fusion scheme, in which two highly…W. B. Zhang, Y. H. Li, D. Wu et al.·Aug 7, 2023SaveLearn
Data-Driven Modeling of Landau Damping by Fourier Neural OperatorThe development of machine learning techniques enables us to construct surrogate models from data of direct numerical simulations, which has important implications for modeling complex physical…Shichen Wei, Yuhong Liu, Haiyang Fu et al.·Aug 5, 2023SaveLearn
Quench Risk Increase With Irradiation DamageSuperconducting material enables fusion reactor magnet concepts to operate with current densities that would melt materials with non-zero resistance. The application of superconducting material is…Jacob John, Mark Gilbert, Chris Hardie·Aug 4, 2023SaveLearn
Parametric Modeling of Serpentine Waveguide Traveling Wave TubesA simple and fast model for numerically calculating small-signal gain in serpentine waveguide traveling-wave tubes (TWTs) is described. In the framework of the Pierce model, we consider…Kasra Rouhi, Robert Marosi, Tarek Mealy et al.·Aug 4, 2023SaveLearn
Variable-moment fluid closures with Hamiltonian structureBased on ideas due to Scovel-Weinstein, I present a general framework for constructing fluid moment closures of the Vlasov-Poisson system that exactly preserve that system's Hamiltonian…J. W. Burby·Aug 4, 2023SaveLearn
Electromagnetic emission from plasma with counter-streaming electron beams in the regime of oblique instability dominanceThe problem of electromagnetic emission generation in plasma with electron beams is relevant both for practical applications and for interpretation of radio emission processes in astrophysical…Vladimir Annenkov, Evgeniia Volchok, Igor Timofeev·Aug 4, 2023SaveLearn
Recovering non-Maxwellian particle velocity distribution functions from collective Thomson-scattered spectraCollective optical Thomson scattering (TS) is a diagnostic commonly used to characterize plasma parameters. These parameters are typically extracted by a fitting algorithm that minimizes the…Bryan C. Foo, Derek B. Schaeffer, Peter V. Heuer·Aug 4, 2023SaveLearn
The equation of state of partially ionized hydrogen and deuterium plasma revisitedWe present novel first-principle fermionic path integral Monte Carlo (PIMC) simulation results for a dense partially ionized hydrogen (deuterium) plasma, for temperatures in the range 15,000K $≤…A. V. Filinov, M. Bonitz·Aug 4, 2023SaveLearn
Moment tracking and their coordinate transformations for macroparticles with an application to plasmas around black holesParticle-in-cell codes usually represent large groups of particles as a single macroparticle. These codes are computationally efficient but lose information about the internal structure of the…Alexander Warwick, Jonathan Gratus·Aug 2, 2023SaveLearn
Gyrokinetic moment-based simulations of the Dimits shiftWe present a convergence study of the gyromoment (GM) approach, which is based on projecting the gyrokinetic distribution function onto a Hermite-Laguerre polynomial basis, focused on the cyclone…A. C. D. Hoffmann, B. J. Frei, P. Ricci·Aug 2, 2023SaveLearn
Trapped-particle precession and modes in quasi-symmetric stellarators and tokamaks: a near-axis perspectiveThis paper presents the calculation of the bounce-averaged drift of trapped particles in a near-axis framework for axisymmetric and quasisymmetric magnetic fields that possess up-down and stellarator…E. Rodriguez, R. J. J. Mackenbach·Aug 2, 2023SaveLearn
A nontwist field line mapping in a tokamak with ergodic magnetic limiterFor tokamaks with uniform magnetic shear, Martin and Taylor have proposed a symplectic map has been used to describe the magnetic field lines at the plasma edge perturbed by an ergodic magnetic…Michele Mugnaine, José D. Szezech, Ricardo L. Viana et al.·Aug 2, 2023SaveLearn
Isochronous island bifurcations driven by resonant magnetic perturbations in TokamaksRecent evidences show that heteroclinic bifurcations in magnetic islands may be caused by the amplitude variation of resonant magnetic perturbations in tokamaks. To investigate the onset of these…B. B. Leal, I. L. Caldas, M. C. de Sousa et al.·Aug 1, 2023SaveLearn
Electromagnetic conversion into kinetic and thermal energiesConversion of electromagnetic energy into magnetohydrodynamic energy occurs when the electric conductivity changes from negligible to finite values. This process is relevant during the epoch of…Axel Brandenburg, Nousaba Nasrin Protiti·Aug 1, 2023SaveLearn
Hamiltonian description for magnetic field lines: a tutorialUnder certain circumstances, the equations for the magnetic field lines can be recast in a canonical form, after defining a suitable field line Hamiltonian. This analogy is extremely useful for…Ricardo L. Viana, Michele Mugnaine, Iberê L. Caldas·Aug 1, 2023SaveLearn
Large amplitude dust-acoustic solitary waves and double layers in nonthermal warm complex plasmasUsing a Sagdeev pseudopotential approach where the nonlinear structures are stationary in a comoving frame, the arbitrary or large amplitude dust-acoustic solitary waves and double layers have been…N. Alam, A. Mannan, A. A. Mamun·Jul 31, 2023SaveLearn
Applying Machine Learning Methods to Laser Acceleration of Protons: Lessons Learned from Synthetic DataResearchers in the field of ultra-intense laser science are beginning to embrace machine learning methods. In this study we consider three different machine learning methods -- a two-hidden layer…Ronak Desai, Thomas Zhang, Ricky Oropeza et al.·Jul 29, 2023SaveLearn
Analytic Hall Magnetohydrodynamics toroidal equilibria via the energy-Casimir variational principleEquilibrium equations for magnetically confined, axisymmetric plasmas are derived by means of the energy-Casimir variational principle in the context of Hall magnetohydrodynamics (MHD). This approach…A. Giannis, D. A. Kaltsas, G. N. Throumoulopoulos·Jul 29, 2023SaveLearn
ReMKiT1D -- A framework for building reactive multi-fluid models of the tokamak Scrape-Off Layer with coupled electron kinetics in 1DIn this manuscript we present the recently developed flexible framework for building both fluid and electron kinetic models of the tokamak Scrape-Off Layer in 1D - ReMKiT1D (Reactive Multi-fluid and…Stefan Mijin, Dominic Power, Ryan Holden et al.·Jul 28, 2023SaveLearn
Theory of electron and ion holes as vortices in the phase-space of collision-less plasmasThis article studies the vortical nature and structure of phase-space holes -- nonlinear B.G.K. trapping modes found in the phase-space collision-free plasmas. A fluid-like outlook of the…Allen Lobo, Vinod Kumar Sayal·Jul 28, 2023SaveLearn
Interactions between flow fields induced by surface dielectric barrier discharge arraysThis study investigates the flow field induced by a surface dielectric barrier discharge (SDBD) system, known for its efficient pollution remediation of volatile organic compounds (VOCs). We aim to…Alexander Böddecker, Maximilian Passmann, Sebastian Wilczek et al.·Jul 28, 2023SaveLearn