Angle-resolved stochastic photon emission in the quantum radiation-dominated regime

Li, Jianxing; Chen, Yueyue; Hatsagortsyan, Karen Z.; Keitel, Christoph H.

doi:10.1038/s41598-017-11871-0

Cited by 19 publications

(23 citation statements)

References 47 publications

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“…For instance, electrons emit high-energy gamma-photons via non-linear Compton scattering and consequently feel recoil, which is usually referred to as radiation-reaction (RR) force [3,4]. In the case where the photon energy is comparable to the electron energy, quantum behavior appears such that the radiation turns to be stochastic [5][6][7][8][9][10]. The electron motion therefore is governed by the quantum radiation-reaction effect in the strong field quantum electro-dynamics (QED) picture.…”

Section: Introductionmentioning

confidence: 99%

Spin-dependent radiative deflection in the quantum radiation-reaction regime

Geng

Shen

et al. 2020

New J. Phys.

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A new spin-dependent deflection mechanism is revealed by considering the spin-correlated radiationreaction force during laser-electron collision. We found that such deflection originates from the nonzero work done by the radiation-reaction force along the laser polarization direction in each halfperiod, which is larger/smaller for spin-anti-paralleled/spin-paralleled electrons. The resulted antisymmetric deflection is further accumulated when the spin-projection onto the laser magnetic field is reversed in adjacent half-periods. The discovered mechanism dominates over the Stern-Gerlach deflection for electrons of several hundreds of MeV and 10 PW-level laser peak power. The results provide a new perspective to study the strong-field QED physics in quantum radiation-reaction regime and an approach to leverage the study of radiation-dominated and strong-field QED physics via particle spins.

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Section: Introductionmentioning

confidence: 99%

Spin-dependent radiative deflection in the quantum radiation-reaction regime

Geng

Shen

et al. 2020

New J. Phys.

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“…5(c1) and (d1). For the given parameters in the MLL model more electrons can be scattered back than in the MC model with SEs [30,31,76]. The electrons are reflected by the scattering laser pulse when the reflection condition γ e a 1 /2 [9] is fulfilled because of the radiation energy loss.…”

Section: Results and Analysismentioning

confidence: 99%

Imprint of the stochastic nature of photon emission by electrons on the proton energy spectra in the laser-plasma interaction

Wan¹,

Xue²,

Dou³

et al. 2019

Plasma Phys. Control. Fusion

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The impact of stochasticity effects (SEs) in photon emissions on the proton energy spectra during laser-plasma interaction is theoretically investigated in the quantum radiation-dominated regime, which may facilitate SEs experimental observation. We calculate the photon emissions quantum mechanically and the plasma dynamics semiclassically via two-dimensional particle-in-cell simulations. An ultrarelativistic plasma generated and driven by an ultraintense laser pulse head-on collides with another strong laser pulse, which decelerates the electrons due to radiation-reaction effect and results in a significant compression of the proton energy spectra because of the charge separation force. In the considered regime the SEs are demonstrated in the shift of the mean energy of the protons up to hundreds of MeV. This effect is robust with respect to the laser and target parameters and measurable in soon available strong laser facilities. * Wenchao.Yan@eli-beams.eu †

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“…The laser field can be boosted by a factor of ∼ γ (electron gamma factor) in the electron rest frame so that the QED parameter χ = e |F · p| /m 3 c 4 could reach unity [22], where F µν is the electromagnetic tensor and p µ is the electron four-momentum. Considerations based on this scenario have been made to observe classical RR [7,16,23,24] and quantum effects [25][26][27][28][29]. Efforts were mainly focused on identifying the signature from either the radiated gamma-photons [17,27] or the electron dynamics [26,28].…”

mentioning

confidence: 99%

“…Considerations based on this scenario have been made to observe classical RR [7,16,23,24] and quantum effects [25][26][27][28][29]. Efforts were mainly focused on identifying the signature from either the radiated gamma-photons [17,27] or the electron dynamics [26,28]. For the latter, particularly, a quantum quenching effect is revealed in the head-on colliding geometry for few-cycle laser pulse [26], by which some electrons can radiate zero energy and go through the laser field freely.…”

mentioning

confidence: 99%

Quantum reflection above the classical radiation-reaction barrier in the quantum electro-dynamics regime

Geng

Shen

et al. 2019

Commun Phys

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The colliding between an ultra-intense laser pulse with a high energy electron beam is not only an important source for high-brightness gamma-rays but also a powerful approach to exploit new physics in the exotic strong-field QED regime. In the cross-colliding geometry, when radiationreaction (RR) force is interpreted by the classical Landau-Lifshitz equation, we found that there is a distinctive barrier that allows penetration of electrons at energies beyond the barrier and blocks those of lower energies. While in the QED perspective, electrons can be well reflected (transmit) in the regime where complete transmission (reflection) is allowed classically. The reflection (transmission) is guaranteed by the quantum nature of radiation but forbidden by classical description. This effect is accompanied by the blurring of the angular distribution for scattered electrons and becomes significant for laser intensities at 2 × 10 23 W/cm 2 and electron energies of ∼ 10 2 MeV; thus could be measured in the up-coming 10-100PW laser facilities. By detecting the reflection rate of the energetic electron beam after colliding and resolve the angular distribution, the results are capable of identifying the boundaries between classical and QED approaches in the strong field regime and testifying the various models describing the fundamental process.Understanding the electron dynamics in relativistic laser fields has been a core interest in strong-field physics and brooded numerous key applications such as fast ignition fusion, acceleration of charged particles and producing bright X/gamma-ray sources. These advantages become strong motivations for developing the 10-100PW high-power laser systems, including SEL, ELI, XCELS, Apollon, Vulcan, SULF [1-6] etc. Light intensity is likely to approach 10 23−24 W/cm 2 in the foreseeable future and promote light-matter interaction to the unprecedented radiation-dominated regime [7] or even the QED regime [8][9][10]. In the new regimes, a rising interest of fundamental importance is the unique electron dynamics at extreme laser fields, in which electrons are accelerated and radiate photons of considerable energies such that recoil force is not negligible. This phenomenon is usually referred as radiation-reaction (RR).Theoretical attempts were made to account for classical RR such as Lorentz-Abraham-Dirac equation [11] and Landau-Lifshitz (LL) equation [12], both of which were derived from the assumption of continuous classical radiation. The latter is widely accepted because it resolves the nonphysical run-away solution [13]. Classical treatment is successive in describing accumulative RR effects. In the QED regime, stochastic radiation and high energy photon (Nos.

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Angle-resolved stochastic photon emission in the quantum radiation-dominated regime

Cited by 19 publications

References 47 publications

Spin-dependent radiative deflection in the quantum radiation-reaction regime

Spin-dependent radiative deflection in the quantum radiation-reaction regime

Imprint of the stochastic nature of photon emission by electrons on the proton energy spectra in the laser-plasma interaction

Quantum reflection above the classical radiation-reaction barrier in the quantum electro-dynamics regime

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