Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse

Samsonov, A. S.; Kostyukov, I. Yu.; Nerush, E. N.

doi:10.48550/arxiv.2010.14116

Cited by 2 publications

(3 citation statements)

References 36 publications

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“…Previous studies show that a plasma cushion, whose density far exceeds a 0 n c , can be formed in front of the target [30][31][32][33][34]. The collective motion of the pair plasma, e.g., the propagation of the cascade front [34,35], is also observed. This provides an exciting micro-laboratory where a dense pair plasma can be stud-ied through the associated HHG spectrum.…”

Section: Discussionmentioning

confidence: 99%

“…This scheme is potentially feasible with the next-generation high-power laser facilities, e.g., ELI [28] and EPAC [29]. Previous studies show this scheme is capable of producing a dense ( the relativistically-corrected critical density) pair plasma cushion in front of the target [30][31][32][33][34][35]. This dense pair production will change the local plasma profile and also the plasma response to the laser coupling.…”

Section: Introductionmentioning

confidence: 99%

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High-order harmonic generation in an electron-positron-ion plasma

Zhang,

Grismayer,

Schoeffler

et al. 2020

Preprint

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The laser interaction with an electron-positron-ion mixed plasma is studied, from the perspective of the associated high-order harmonic generation. For an idealized mixed plasma which is assumed with a sharp plasma-vacuum interface and uniform density distribution, when it is irradiated by a weakly relativistic laser pulse, well-defined signals at harmonics of the plasma frequency in the harmonic spectrum are observed. These characteristic signals are attributed to the inverse twoplasmon decay of the counterpropagating monochromatic plasma waves which are excited by the energetic electrons and the positron beam accelerated by the laser. Particle-in-cell simulations show the signal at twice the plasma frequency can be observed for a pair density as low as ∼ 10 −5 of the plasma density. In the self-consistent scenario of pair production by an ultraintense laser striking a solid target, particle-in-cell simulations, which account for quantum electrodynamic effects (photon emission and pair production), show that dense (greater than the relativistically-corrected critical density) and hot pair plasmas can be created. The harmonic spectrum shows weak low order harmonics, indicating a high laser absorption due to quantum electrodynamic effects. The characteristic signals at harmonics of the plasma frequency are absent, because broadband plasma waves are excited due to the high plasma inhomogeneity introduced by the interaction. However, the high frequency harmonics are enhanced due to the high-frequency modulations from the direct laser coupling with created pair plasmas.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-order harmonic generation in an electron-positron-ion plasma

Zhang,

Grismayer,

Schoeffler

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Further simulations, however, demonstrated generation of cascades in more realistic settings, e.g. by irradiating dilute gas or electron cloud [35][36][37][38], near-critical-density plasma [39,40], or dense solid [41][42][43][44][45][46] targets. Note that in the latter case it was enough to irradiate a target from one side, since due to reflection a counterpropagating wave was formed by itself.…”

Section: Introductionmentioning

confidence: 99%

Onset of electron-seeded cascades in generic electromagnetic fields

Mironov,

Gelfer,

Fedotov

2021

Preprint

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QED cascades in a strong electromagnetic field of optical range and arbitrary configuration are considered. A general expression for short-time dependence of the key electron quantum dynamical parameter is derived, allowing to generalize the effective threshold condition of QED cascade onset. The generalized theory is applied to selfsustained cascades in a single focused laser pulse. According to numerical simulations, if a GeV electron bunch is used as a seed, an ordinary cascade can be converted into the selfsustained one. As an application, it would be also possible to produce this way bright collimated photon beams with up to GeV photon energies.

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Hydrodynamical model of QED cascade expansion in an extremely strong laser pulse

Cited by 2 publications

References 36 publications

High-order harmonic generation in an electron-positron-ion plasma

High-order harmonic generation in an electron-positron-ion plasma

Onset of electron-seeded cascades in generic electromagnetic fields

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