Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Gong, Zheng; Mackenroth, Felix; Yan, Xueqing; Arefiev, Alexey

doi:10.1038/s41598-019-53644-x

Cited by 30 publications

(35 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our scaling laws can then be applied using this effective n eff p instead of n p to calculate the asymptotic cutoff energy of the electron beam. An example for a 0 = 200 and a M B = 10 −2 a 0 from reference [46], can be mapped using I ∼ 40 and ω p /ω 0 ∼ 0.3. Our model predicsts the asymptotic electron energy is ∼ 7 GeV, which is in agreement with their simulations that show 7.5 GeV.…”

Section: Discussionmentioning

confidence: 99%

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

et al. 2020

View full text Add to dashboard Cite

We study electron acceleration within a sub-critical plasma channel irradiated by an ultra-intense laser pulse (a0 > 100 or I > 10 22 W/cm 2). In this regime, radiation reaction significantly alters the electron dynamics. This has an effect not only on the maximum attainable electron energy but also on the phase-matching process between betatron motion and electron oscillations in the laser field. Our study encompasses analytical description, test-particle calculations and 2-dimensional particlein-cell simulations. We show single-stage electron acceleration to multi-GeV energies within a 0.5 mm-long channel and provide guidelines how to obtain energies beyond 10 GeV using optimal initial configurations. We present the required conditions in a form of explicit analytical scaling laws that can be applied to plan the future electron acceleration experiments.

show abstract

Section: Discussionmentioning

confidence: 99%

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[32,33] and described theoretically in Refs. [34,35]. The peak magnitude of the external magnetic field corresponds to a field strength of 10 8 G. It has been demonstrated in Ref.…”

Section: Simulation Parametersmentioning

confidence: 66%

Multi-stage scheme for nonlinear Breit–Wheeler pair-production utilising ultra-intense laser-solid interactions

Duff¹,

Capdessus²,

Ridgers³

et al. 2019

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

Multi-petawatt (PW) lasers enable intensities exceeding 10 23 Wcm −2 , at which point quantum electrodynamics (QED) processes, such as electron-positron pairproduction via the non-linear Breit-Wheeler process, will play a significant role in laser-plasma interactions. Using 2D QED-particle-in-cell simulations, we present a two-stage scheme in which non-linear pair-production is induced via an ultra-intense laser-solid interaction. The first stage is the generation of a γ-ray beam, through the interaction of an ultra-intense laser pulse with a thick target, whose features are found to be strongly dependent on collective plasma effects. This compact, high energy γray beam (characterised by a divergence half-angle ∼10 • and average photon energy ∼ 10 MeV) then interacts with two counter-propagating laser pulses. By varying the laser polarisation and angle of incidence, we show that in the case of two circularly polarised laser pulses propagating at an angle equal to the divergence half-angle of the γ-ray beam, the produced positron distribution is highly anisotropic compared to the case of a standard head-on collision.

show abstract

“…This scheme is also compatible with an axial B-field to guide the high-energy electron beam in FI, in which both self-generated B-field and compressed external B-field can reduce the electron divergence. Improving the electron beam confinement along the propagation axis would significantly raise the electron energy flux deep into a target, and many subsequent physical mechanisms would benefit from those developments, such as secondary sources of particles [ 28 ], hard X-rays [ 29 ] and gamma-ray [ 30 ] emission yields, or isochoric heating of dense matter [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma

Kawahito

Bailly-Grandvaux

Dozières

et al. 2020

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

Inertial confinement fusion approaches involve the creation of high-energy-density states through compression. High gain scenarios may be enabled by the beneficial heating from fast electrons produced with an intense laser and by energy containment with a high-strength magnetic field. Here, we report experimental measurements from a configuration integrating a magnetized, imploded cylindrical plasma and intense laser-driven electrons as well as multi-stage simulations that show fast electrons transport pathways at different times during the implosion and quantify their energy deposition contribution. The experiment consisted of a CH foam cylinder, inside an external coaxial magnetic field of 5 T, that was imploded using 36 OMEGA laser beams. Two-dimensional (2D) hydrodynamic modelling predicts the CH density reaches 9.0 g cm − 3 , the temperature reaches 920 eV and the external B-field is amplified at maximum compression to 580 T. At pre-determined times during the compression, the intense OMEGA EP laser irradiated one end of the cylinder to accelerate relativistic electrons into the dense imploded plasma providing additional heating. The relativistic electron beam generation was simulated using a 2D particle-in-cell (PIC) code. Finally, three-dimensional hybrid-PIC simulations calculated the electron propagation and energy deposition inside the target and revealed the roles the compressed and self-generated B-fields play in transport. During a time window before the maximum compression time, the self-generated B-field on the compression front confines the injected electrons inside the target, increasing the temperature through Joule heating. For a stronger B-field seed of 20 T, the electrons are predicted to be guided into the compressed target and provide additional collisional heating. This article is part of a discussion meeting issue ‘Prospects for high gain inertial fusion energy (part 2)’.

show abstract

Radiation reaction as an energy enhancement mechanism for laser-irradiated electrons in a strong plasma magnetic field

Cited by 30 publications

References 65 publications

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

Scaling laws for direct laser acceleration in a radiation-reaction dominated regime

Multi-stage scheme for nonlinear Breit–Wheeler pair-production utilising ultra-intense laser-solid interactions

Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma

Contact Info

Product

Resources

About