Analysis of Capture and Surfatron Ultrarelativistic Acceleration of Electrons with Initial Relativistic Energy

Ерохин, Н. С.; Shkevov, Rumen; Zol’nikova, N. N.; Mikhailovskaya, L. A.

doi:10.3997/2214-4609.201414211

Cited by 5 publications

(7 citation statements)

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“…An alternative approach considered the effect of adiabatic trapping at the microscopic level was introduced a decade later by Gurevich 55 and it was observed that the adiabatic trapping produced a 3/2 power nonlinearity instead of the usual quadratic one when trapping was absent. Experimental investigations 56 and computer simulations 57 confirmed the presence of trapping as a microscopic phenomenon.…”

Section: Introductionsupporting

confidence: 64%

Solitary structures in a spatially nonuniform degenerate plasma in the presence of quantizing magnetic field

et al. 2015

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In the present investigation, linear and nonlinear propagation of low frequency (x ( X ci ) electrostatic waves have been studied in a spatially inhomogeneous degenerate plasma with one dimensional electron trapping in the presence of a quantizing magnetic field and finite temperature effects. Using the drift approximation, formation of 1 and 2D drift ion solitary structures have been studied both for fully and partially degenerate plasmas. The theoretical results obtained have been analyzed numerically for the parameters typically found in white dwarfs for illustrative purpose. It is observed that the inclusion of Landau quantization significantly changes the expression of the electron number density of a dense degenerate plasma which affects the linear and nonlinear propagation of drift acoustic solitary waves in such a system. The present work may be beneficial to understand the propagation of drift solitary structures with weak transverse perturbation in a variety of physical situations, such as white dwarfs and laser-induced plasmas, where the quantum effects are expected to dominate. V C 2015 AIP Publishing LLC. [http://dx.

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Section: Introductionsupporting

confidence: 64%

Solitary structures in a spatially nonuniform degenerate plasma in the presence of quantizing magnetic field

et al. 2015

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“…The existence of trapping as a microscopic phenomenon has been confirmed by computer simulations (Erokhin et al 1996;Sagdeev 1996) and experimental investigations (Hansen et al 1996). Maxwellian and non-Maxwellian distribution functions were used to investigate the trapping effect on the propagation characteristics of ion acoustic solitons and it was seen that solitary dynamics was modified in both cases (Abbasi et al 1999;Mushtaq and Shah 2006).…”

Section: Introductionmentioning

confidence: 81%

Finite amplitude solitary structures of coupled kinetic Alfven-acoustic waves in dense plasmas

Sabeen

Shah

Masood

et al. 2014

Astrophys Space Sci

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In this paper, we have investigated the nonlinear propagating coupled Kinetic Alfven-acoustic waves in a low beta degenerate quantum plasma in the presence of trapped Fermi electrons using the quantum hydrodynamic (QHD) model. By using the two potential theory and the Sagdeev potential approach, we have investigated the formation of solitary structures for coupled kinetic Alfven-acoustic waves in the presence of quantum mechanically trapped electrons. We have shown that there are regions of propagation and non-propagation for such solitary structures. We have also highlighted the differences between the classical and quantum mechanically trapped electrons. Interestingly, it has been found that the nature of the nonlinearity for the quantum mechanically trapped electrons is different from its classical counterpart. The results presented here may have applications in white dwarf asteroseismology as well as next generation laserplasma experiments where low beta plasma condition is met.

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“…Surfing of charge particles by electromagnetic waves that can be in the Cherenkov resonance with particles is one of the most probable mechanisms for the generation of ultrarelativistic particle fluxes in space plasma (see [1][2][3][4][5][6][7][8][9][10][11]). In order to correctly estimate conditions for the generation of fast particles fluxes and their parameters, it is necessary to analyze the mechanism of charged particle trapping into the regime of surfatron acceleration by an electromagnetic wave, determine the efficiency of such acceleration, and find optimum conditions for its implementation.…”

Section: Introductionmentioning

confidence: 99%

“…In order to correctly estimate conditions for the generation of fast particles fluxes and their parameters, it is necessary to analyze the mechanism of charged particle trapping into the regime of surfatron acceleration by an electromagnetic wave, determine the efficiency of such acceleration, and find optimum conditions for its implementation. Some of these problems were earlier considered, e.g., in [1][2][3][4][5][6][7][8]. Since there are a lot of free parameters, the total amount of required computations turns out to be very large; therefore, the problem should be studied step-by-step.…”

Section: Introductionmentioning

confidence: 99%

“…Earlier, it was shown (see, e.g., [6,9,12]) that, in the simplest model of surfatron acceleration, the problem is reduced to solving a nonlinear time-dependent second-order dissipative differential equation for the wave phase Ψ(τ) on the trajectory of a charged particle oscillating in an effective potential well in the region of the accelerating field. According to results of numerical calculations, the period of these oscillations increases substantially upon sufficiently strong particle acceleration, while the oscillation amplitude decreases and asymptotically tends to zero.…”

Section: Introductionmentioning

confidence: 99%

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Trajectories of electrons with large longitudinal momenta in the phase plane during surfatron acceleration by an electromagnetic wave

Mkrtichyan

2015

Plasma Phys. Rep.

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The trajectories of electrons with large longitudinal momenta in the phase plane in the course of their surfatron acceleration by an electromagnetic wave propagating in space plasma across the external magnetic field are analyzed. Electrons with large longitudinal momenta are trapped immediately if the initial wave phase Ψ(0) on the particle trajectory is positive. For negative values of Ψ(0), no electrons trapping by the wave is observed over the available computational times. According to numerical calculations, the trajectories of trapped particles in the phase plane have a singular point of the stable focus type and the behavior of the trajectory corresponds to the motion in a complex nonstationary effective potential well. For some initial phases, electrons are confined in the region of the accelerating electric field for relatively short time, the energy gain being about 50-130% and more.

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Analysis of Capture and Surfatron Ultrarelativistic Acceleration of Electrons with Initial Relativistic Energy

Cited by 5 publications

References 0 publications

Solitary structures in a spatially nonuniform degenerate plasma in the presence of quantizing magnetic field

Solitary structures in a spatially nonuniform degenerate plasma in the presence of quantizing magnetic field

Finite amplitude solitary structures of coupled kinetic Alfven-acoustic waves in dense plasmas

Trajectories of electrons with large longitudinal momenta in the phase plane during surfatron acceleration by an electromagnetic wave

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