Electromagnetic Energy Penetration in the Self-Induced Transparency Regime of Relativistic Laser-Plasma Interactions

Tushentsov, M.; Kim, A. V.; Cattani, Federica; Anderson, D.; Lisak, M.

doi:10.1103/physrevlett.87.275002

Cited by 57 publications

(50 citation statements)

References 27 publications

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“…When the background plasma density n e is greater than 1.5n c , the interaction results in the generation of plasma field structure consisting of alternating plasma and vacuum regions with the CP laser penetrating into the over-dense plasmas over a finite length, which is consistent with the previous studies 23,24 . Because the formation time of the alternating plasma field structure is quite long which is about hundreds of laser period, it call for quite long incident laser pulse.…”

supporting

confidence: 89%

“…The penetration of the ultra-short CP irradiation occurs through a soliton like behavior which is consistent with previous theoretical and fluid-Maxwell simulation studies 23,24,29 , and its propagation in the homogeneous background plasmas is quasi-static. However, it is shown that, for the ultra-short CP laser, the penetration occurs through a breaker like behavior, and there is an energy transition mechanism with a frequency 2ω 0 between the penetrated breather like structure and the background plasmas.…”

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confidence: 89%

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Breather-like penetration of ultrashort linearly polarized laser into over-dense plasmas

Zheng

Yan

et al. 2013

Physics of Plasmas

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Relativistic electromagnetic penetration behavior is reexamined in the relativistic transparency region. The interaction is modeled by the relativistic hydrodynamic equations coupled with the full system of Maxwell equations, which are solved by a fully implicit energy-conserving numerical scheme. For the first time, we have studied the penetration behavior through ultra-short circularly polarized and linearly polarized laser pulses interaction with over-dense plasmas. It is shown that for the ultra-short circularly polarized laser penetration occurs through a soliton like behavior, which is quite consistent with the existing studies. However, we have found that the ultra-short linearly polarized laser penetrates through a breather like behavior, and there is an energy transition mechanism with a frequency 2ω 0 between the penetrated breather like structure and the background plasmas. A qualitative interpretation has been given to describe this mechanism of energy exchange.PACS numbers: 52.38. Kd, 41.75.Jv, 52.35.Mw, The dynamics of the penetration of ultra-intense laser irradiation into classically-forbidden plasmas has attracted wide attention for its distinct prospective applications. The penetration of intense laser radiation into over-dense plasma core would be crucial in the concept of the fast ignition fusion 1 , plasma lens for ultra-intense laser focusing 2 and betatron oscillations for high intense electron acceleration 3,4 . Kaw et al. are the first to predict that relativistically strong laser can reduce the effective plasma frequency below the frequency of the laser radiation, allowing the laser to penetrate through the over-dense plasmas 5 . This problem has been greatly enriched by a series of theoretical and particle-in-cell simulation studies 6-21 . Tushentsov et al. are the first to study the irradiation penetration of the circularly polarized (CP) laser pulse through fluid-Maxwell simulations 23 , but there is a serious shortcoming: the Maxwell equations are solved within the framework of parabolic approximation, which will certainly break down for ultrashort laser pulse. Afterward, Berezhiani et al. abandon the parabolic approximation and solve the full system of relativistic hydrodynamic and Maxwell equations 24 . However in their results, we have not found the intrinsic application to the study of ultra-short laser penetration into over-dense plasmas. In their fluid-Maxwell simulations, the laser duration and solitons formation time are over 100T 0 . Their simulation results just reconfirm that of Tushentsov et al. with parabolic approximation. It a) Electronic mail: wudongphysics@gmail.com b) Electronic mail: zheng chunyang@iapcm.ac.cn c) Electronic mail: xthe@iapcm.ac.cn should be emphasized that their is no theoretical analysis on the penetration into over-dense plasmas with linearly polarized (LP) laser, because the second-harmonic oscillating component of the ponderomotive force could disturb the background plasma density and make the problem even more complicated. The difficulty of th...

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supporting

confidence: 89%

supporting

confidence: 89%

Breather-like penetration of ultrashort linearly polarized laser into over-dense plasmas

Zheng

Yan

et al. 2013

Physics of Plasmas

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“…For the chosen parameters, the reflectivity R is nearly unity in this stage and there is no self-induced transparency. 38,39 The laser electric field E L cannot penetrate the foil and only a small number of electrons are driven out. formed.…”

Section: Multistaged Acceleration Of Thin Foilmentioning

confidence: 99%

High-energy monoenergetic protons from multistaged acceleration of thin double-layer target by circularly polarized laser

Zhang

Sheng

et al. 2011

Physics of Plasmas

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Multistaged acceleration of solid-density thin foils by ultraintense circularly polarized laser pulse is investigated. A stable radiation pressure acceleration (RPA) stage is first established. Higher dimensional effects such as transverse instabilities and enhanced electron heating then gradually make the initially opaque foil transparent to the laser light. Accordingly, the dominant acceleration mechanism changes smoothly from RPA to target normal sheath acceleration (TNSA). The transition can therefore enhance the maximum energy of the accelerated ions but broaden their energy spectrum. For a double-layer target, however, the light ions (protons) in the backlayer can be efficiently accelerated in the RPA and TNSA regimes nearly monoenergetically. Two-dimensional particle-in-cell simulations show that with this scheme a circularly polarized laser pulse of peak intensity 3.9×1022 W/cm2 can produce a collimated proton bunch that persists for many Rayleigh lengths and its peak energy can reach 4.2 GeV with FWHM of 200 MeV.

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“…Instead, there exists a transition from opacity to transparency near the laser pulse front inside a plasma. Depending on such transition process, which is actually dependent on various laser and plasma parameters, the final propagation mode of the pulse takes diverse forms: simple traveling wave modes for circular [24] and linearly [25] polarized waves, the formation of standing waves in steady states for circular [26,27] and linear polarizations [28], the formation of solitary waves [29,30], the penetration of a relativistic wave in a cavitated plasma [31,32], and the laser piston formation [33,34]. In this section, we briefly present a channel-digging process of a linearly polarized pulse along with a semi-phenomenological formula for the 1-dimensional channel-digging speed [23].…”

Section: Channel-digging Through An Overdense Plasmamentioning

confidence: 99%

Pulse shaping by relativistic transparency in overdense plasma and its applications in particle acceleration

Hur¹,

Kulagin²,

Nam³

et al. 2013

AIP Conference Proceedings

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Abstract.A versatile shaping of a laser pulse using relativistic transparency in an overdense plasma has been studied. First we present the propagation of a linearly polarized pulse through an overdense plasma and a semi-phenomenological 1-dimensional formula to calculate the channel-digging speed. Second the pulse shaping both in longitudinal and transverse directions using a non-uniform plasma slab is presented by 2-dimensional particle-in-cell simulations. The second subject is a unique point of this work in the context of relativistic transparency and pulse shaping. Furthermore the 2-dimensional results are shown to be in a good agreement with the 1-dimensional formula of the channel-digging. The shaping scheme using non-uniform plasmas gives more freedom to the control of the shape of ultraintense pulses for various purposes.

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Electromagnetic Energy Penetration in the Self-Induced Transparency Regime of Relativistic Laser-Plasma Interactions

Cited by 57 publications

References 27 publications

Breather-like penetration of ultrashort linearly polarized laser into over-dense plasmas

Breather-like penetration of ultrashort linearly polarized laser into over-dense plasmas

High-energy monoenergetic protons from multistaged acceleration of thin double-layer target by circularly polarized laser

Pulse shaping by relativistic transparency in overdense plasma and its applications in particle acceleration

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