Numerical simulation of nonlinear processes in a beam-plasma system

Efimova, A. A.; Berendeev, Evgeny; Dudnikova, G. I.; Вшивков, В. А.

doi:10.1063/1.4934338

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…For more recent applications, see, e.g. [31][32][33] and reference therein, and [34]. The most significant discrepancy, emerging in the above discussed comparison, concerns the system time 'reactivity', i.e.the QL dynamics appears as slower with respect the exact Hamiltonian one (see also [35]).…”

Section: Introductionmentioning

confidence: 99%

Quasi-linear model for the beam-plasma instability: analysis of the self-consistent evolution

Montani

Cianfrani

Carlevaro

2019

Plasma Phys. Control. Fusion

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We re-analyze the quasi-linear self consistent dynamics for the beam-plasma instability, by comparing the theory predictions to numerical simulations of the corresponding Hamiltonian system. While the diffusive features of the asymptotic dynamics are reliably predicted, the early temporal mesoscale transport appears less efficient in reproducing the convective feature of the self-consistent scenario. As a result, we identify the origin of the observed discrepancy in the underlying quasilinear model assumption that the distribution function is quasi-stationary. Furthermore, we provide a correction to the instantaneous quasi-linear growth rate based on a linear expansion of the distribution function time dependence, and we successfully test this revised formulation for the spectral evolution during the temporal mesoscale.

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Section: Introductionmentioning

confidence: 99%

Quasi-linear model for the beam-plasma instability: analysis of the self-consistent evolution

Montani

Cianfrani

Carlevaro

2019

Plasma Phys. Control. Fusion

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“…Simulation box has sizes L x × L y = 1800h × 640h and contains approximately 2 · 10 8 macroparticles of each plasma and beam species. At least 1000 particles per sell are required for the calculations, making necessary to use highperformance computers and efficient parallel algorithms based on the Euler-Lagrange domain decomposition [12,13]. The calculations were performed on the "Lomonosov" supercomputer (Moscow State University, Intel Xeon 5570, 2932MHz) and on the NSU supercomputer (Novosibirsk State University, Intel Xeon X5670, 2932MGz).…”

Section: The Problem Statementmentioning

confidence: 99%

PIC-simulation of the electron beam interaction with modulated density plasma

Berendeev

Dudnikova

Efimova

2017

AIP Conference Proceedings

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Abstract. In this paper, the processes of electromagnetic radiation generation as a result of the interaction of a relativistic electron beam with hydrogen and argon plasma are studied on the basis of numerical modeling by the particle-in-cells method (PIC). Series of numerical experiments for different background plasma parameters, beam and magnetic field have been performed using modern computer systems with massively parallel architecture. Estimates of the radiation efficiency for both the initially homogeneous plasma and for longitudinal density modulation are obtained. It is shown that the change in the plasma density due to the development of the modulation instability makes it possible to increase substantially the power of the generated sub-THz radiation. The parameters used in numerical experiments correspond to the conditions of laboratory experiments on GOL-3 facility (BINP SB RAS, Novosibirsk, Russia).

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