Spin polarization of electrons by ultraintense lasers

Sorbo, Dario Del; Seipt, D.; Blackburn, Tom; Thomas, Alexander; Murphy, C. D.; Kirk, J. G.; Ridgers, C. P.

doi:10.1103/physreva.96.043407

Cited by 110 publications

(98 citation statements)

References 46 publications

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“…where E and B are the electric and magnetic fields, p the momentum, γ the Lorentz factor, e the electron charge, m the electron mass and = »-a 1.16 10 e g 2 2 3 e the anomalous magnetic moment of electron [21]. The QED-based photon emission process including electron spin is correlated to the radiation spectrum of the electron for the spin-paralleled/-anti-paralleled case, similar to the Sokolov-Ternov effect [11] (see also [22]) under the locally constant field approximation (LCFA):…”

Section: Qed Spin-dependent Radiation-reaction Modelmentioning

confidence: 90%

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: Qed Spin-dependent Radiation-reaction Modelmentioning

confidence: 90%

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

Geng

Shen

et al. 2020

New J. Phys.

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“…Typically the polarization time for 17]. The S-T like effect could be significant in the strong-field QED regime and lead to certain degree of beam polarization [37,38], relying on the collision of multi-GeV electrons with a laser pulse of focal intensity >5×10 22 W cm −2 . However, in LWFA the typical relativistic factor of electrons and field strength are γ e ∼10 3 and F∼10 16 V m −1 , respectively.…”

Section: Spin Dynamics and Simulation Parametersmentioning

confidence: 99%

Polarized electron-beam acceleration driven by vortex laser pulses

Geng

et al. 2019

New J. Phys.

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We propose a new approach based on an all-optical set-up for generating relativistic polarized electron beams via vortex Laguerre-Gaussian (LG) laser-driven wakefield acceleration. Using a pre-polarized gas target, we find that the topology of the vortex wakefield resolves the depolarization issue of the injected electrons. In full three-dimensional particle-in-cell simulations, incorporating the spin dynamics via the Thomas-Bargmann Michel Telegdi equation, the LG laser preserves the electron spin polarization by more than 80% while assuring efficient electron injection. The method releases the limit on beam flux for polarized electron acceleration and promises more than an order of magnitude boost in peak flux, as compared to Gaussian beams. These results suggest a promising table-top method to produce energetic polarized electron beams.

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“…Simulations are performed with the PIC code EPOCH [39], which includes both plasma physics and nonlinear QED interactions [40,41], the latter according to [42]. Spin polarization effects [7] are neglected. Figure 1 shows 3D simulation results of HB ion acceleration in the regime where QED effects are important, at time t=6T L (where T L ≈3.33 fs is the laser period).…”

Section: Quenching Of Hb Ion Acceleration By a Self-generated Pair-plmentioning

confidence: 99%

“…Next generation lasers, such as those comprising the soon to be completed Extreme Light Infrastructure [3], could accelerate ions to GeV energies with 100% efficiency in principle [4,5]. However, at the intensities expected to be reached in these laser-matter interactions (I>10 23 W cm −2 ), the laser very rapidly ionizes the target to form a plasma in which nonlinear quantum-electrodynamic (QED) effects play a crucial role [6][7][8]. Energetic electrons radiate MeV energy gamma-ray photons by nonlinear Compton scattering.…”

Section: Introductionmentioning

confidence: 99%

Efficient ion acceleration and dense electron–positron plasma creation in ultra-high intensity laser-solid interactions

et al. 2018

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The radiation pressure of next generation ultra-high intensity (>10 23 W cm −2 ) lasers could efficiently accelerate ions to GeV energies. However, nonlinear quantum-electrodynamic effects play an important role in the interaction of these laser pulses with matter. Here we show that these effects may lead to the production of an extremely dense (∼10 24 cm −3 ) pair-plasma which absorbs the laser pulse consequently reducing the accelerated ion energy and laser to ion conversion efficiency by up to 30%-50% and 50%-65%, respectively. Thus we identify the regimes of laser-matter interaction, where either ions are efficiently accelerated to high energy or dense pair-plasmas are produced as a guide for future experiments.

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Spin polarization of electrons by ultraintense lasers

Cited by 110 publications

References 46 publications

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

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

Polarized electron-beam acceleration driven by vortex laser pulses

Efficient ion acceleration and dense electron–positron plasma creation in ultra-high intensity laser-solid interactions

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