2D Monte Carlo simulation of cascades in rotating electrical field

Legkov, M. V.; Fedotov, A. M.; Elkina, N. V.; Rühl, H.

doi:10.1117/12.881026

Cited by 2 publications

(2 citation statements)

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“…However, the cascades always arise for a focused laser pulse or for any combination of several such pulses. Moreover, the threshold intensity observed in simulations was essentially lower than 10 25 W/cm 2 because of the large size of the focal region and presumably fluctuations of parameters χ and mean free times t e,γ [37,41,34,43,45]. But one should bear in mind that most of the authors for simplicity used in their simulations the probability rates for nonpolarized particles.…”

Section: Laser Fieldmentioning

confidence: 99%

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Creation of electron-positron plasma with superstrong laser field

Narozhny

Fedotov

2014

Eur. Phys. J. Spec. Top.

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Abstract. We present a short review of recent progress in studying QED effects of interaction of ultrarelativistic laser pulses with vacuum and e − e + plasma. The development of laser technologies promises very rapid growth of laser intensities in close future already. Two exawatt class facilities (ELI and XCELS, Russia) in Europe are already in the planning stage. Realization of these projects will make available a laser of intensity ∼ 10 26 W/cm 2 or even higher. Therefore, discussion of nonlinear optical effects in vacuum are becoming urgent for experimentalists and are currently gaining much attention. We show that, in spite of the fact that the respective field strength is still essentially less than ES = m 2 c 3 /e = 1.32 · 10 16 V/cm, the nonlinear vacuum effects will be accessible for observation at ELI and XCELS facilities. The most promissory for observation is the effect of pair creation by laser pulse in vacuum. It is shown, that at intensities ∼ 5·10 25 W/cm 2 , creation even of a single pair is accompanied by development of an avalanchelike QED cascade. There exists an important distinctive feature of the laser-induced cascades, as compared with the air showers arising due to primary cosmic ray entering the atmosphere. In our case the laser field plays not only the role of a target (similar to a nucleus in the case of air showers). It is responsible also for acceleration of slow particles. It is shown that the effect of pair creation imposes a natural limit for attainable laser intensity. Apparently, the field strength E ∼ ES is not accessible for pair creating electromagnetic field at all.PACS. 42.50.Ct Quantum description of interaction of light and matter; related experiments -12.20.Ds Specific calculations -52.27.Ep Electron-positron plasmas

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Section: Laser Fieldmentioning

confidence: 99%

“…By now, Eqs. (2a), (2b) were solved numerically by the Monte-Carlo method [41,34,42,43,44,45] in combination with the particle-incell (PIC) scheme [46] for the cases when it was necessary to take into account plasma effects. These simulations seem to confirm the above described qualitative picture of cascade development.…”

Section: Laser Fieldmentioning

confidence: 99%

Creation of electron-positron plasma with superstrong laser field

Narozhny

Fedotov

2014

Eur. Phys. J. Spec. Top.

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Improving the accuracy of simulation of radiation-reaction effects with implicit Runge-Kutta-Nyström methods

Elkina¹,

Fedotov

Herzing³

et al. 2014

Phys. Rev. E

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The Landau-Lifshitz equation provides an efficient way to account for the effects of radiation reaction without acquiring the nonphysical solutions typical for the Lorentz-Abraham-Dirac equation. We solve the Landau-Lifshitz equation in its covariant four-vector form in order to control both the energy and momentum of radiating particles. Our study reveals that implicit time-symmetric collocation methods of the Runge-Kutta-Nyström type are superior in accuracy and better at maintaining the mass-shell condition than their explicit counterparts. We carry out an extensive study of numerical accuracy by comparing the analytical and numerical solutions of the Landau-Lifshitz equation. Finally, we present the results of the simulation of particle scattering by a focused laser pulse. Due to radiation reaction, particles are less capable of penetrating into the focal region compared to the case where radiation reaction is neglected. Our results are important for designing forthcoming experiments with high intensity laser fields.

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2D Monte Carlo simulation of cascades in rotating electrical field

Cited by 2 publications

References 0 publications

Creation of electron-positron plasma with superstrong laser field

Creation of electron-positron plasma with superstrong laser field

Improving the accuracy of simulation of radiation-reaction effects with implicit Runge-Kutta-Nyström methods

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