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

Geng, Xuesong; Ji, Liangliang; Shen, Baifei; Feng, Bo; Guo, Zhao; Han, Qi; Qin, Chengyu; Wang, N W; Wang, W Q; Wu, Yitong; Yan, Xueqing; Yu, Qin; Zhang, L G; Xu, Zhizhan

doi:10.1088/1367-2630/ab623b

Cited by 21 publications

(15 citation statements)

References 34 publications

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“…Due to a spin-dependent radiation reaction, a monochromatic, elliptically polarized laser pulse can split an initially unpolarized relativistic electron ensemble along the propagation direction into two oppositely transversely polarized parts; see Figure 1. A similar spin-dependent deflection mechanism is found by Geng et al [36] , who study the spin-correlated radiation-reaction force during the interaction of an initially polarized electron bunch with a linearly polarized laser pulse. The discovered mechanism dominates over the Stern-Gerlach force, which can provide a new perspective for studying spin-dependent QED effects.…”

Section: Polarization Build-up From Interactions With Relativistic Lasupporting

confidence: 75%

“…In general, the radiation-reaction force exceeds the Stern-Gerlach force by far if the particles are relativistic (kinetic energies well above 1 GeV) or even ultrarelativistic (above 1 TeV) (see also Ref. [36]). There are, however, some field configurations that reverse this situation, so that the radiation-reaction force can be neglected compared to the Stern-Gerlach force (see e.g., Ref.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

See 1 more Smart Citation

Generation of polarized particle beams at relativistic laser intensities

Büscher

Hützen

et al. 2020

High Pow Laser Sci Eng

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The acceleration of polarized electrons, positrons, protons and ions in strong laser and plasma fields is a very attractive option for obtaining polarized beams in the multi-mega-electron volt range. Recently, there has been substantial progress in the understanding of the dominant mechanisms leading to high degrees of polarization, in the numerical modeling of these processes and in their experimental implementation. This review paper presents an overview on the current state of the field, and on the concepts of polarized laser–plasma accelerators and of beam polarimetry.

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Section: Polarization Build-up From Interactions With Relativistic Lasupporting

confidence: 75%

Section: Theoretical Backgroundmentioning

confidence: 99%

Generation of polarized particle beams at relativistic laser intensities

Büscher

Hützen

et al. 2020

High Pow Laser Sci Eng

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“…The spin modifies the particle momentum indirectly, by affecting the radiation power (Del and thereby the strength of radiation reaction. Signatures of spindependent radiative deflection in tightly focused lasers are studied in Geng et al (2020). However, if the external electromagnetic field is non-homogeneous, its interaction with the spin also leads directly to a force on the particle; this contribution to the equation of motion is often referred to as the 'Stern-Gerlach force', after the seminal experiment that demonstrated the intrinsic quantum nature of the electron magnetic moment (Gerlach and Stern, 1922).…”

Section: 𝑔 𝑠mentioning

confidence: 99%

Charged particle motion and radiation in strong electromagnetic fields

Gonoskov¹,

Blackburn²,

Marklund³

et al. 2021

Preprint

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The dynamics of charged particles in electromagnetic fields is an essential component of understanding the most extreme environments in our Universe. In electromagnetic fields of sufficient magnitude, radiation emission dominates the particle motion and effects of nonlinear quantum electrodynamics (QED) are crucial, which triggers electron-positron pair cascades and counterintuitive particle-trapping phenomena. As a result of recent progress in laser technology, high-power lasers provide a platform to create and probe such fields in the laboratory. With new large-scale laser facilities on the horizon and the prospect of investigating these hitherto unexplored regimes, we review the basic physical processes of radiation reaction and QED in strong fields, how they are treated theoretically and in simulation, the new collective dynamics they unlock, recent experimental progress and plans, as well as possible applications for high-flux particle and radiation sources. CONTENTS42 VI. Applications 43 A. Radiation generation 43 1. Electron-beam driven radiation sources 43 2. Laser-driven radiation sources 44 B. Positron sources 46 C. Polarized particle beams 46 D. Ion acceleration 47 VII. Outlook 48 A. Open questions 48 1. Theoretical questions 48 2. Simulation developments 49 B. Experimental programs 50 VIII. Conclusions 50 Acknowledgments 51 List of commonly used symbols 51 References 52

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“…To simulate the radiative polarization under this condition, various numerical calculation models have been developed. One of the commonly used models is based on the Monte Carlo method with the help of an artificially selected axis, and the axis is called the spin quantization axis (SQA) in some articles [16,[34][35][36]. Specifically, the electron emits photons following the same method as the normal Monte Carlo model of photon emission where the spin polarization is not considered [37][38][39][40][41][42][43][44], and once the electron emits a photon, the spin falls on a certain state of the SQA (i.e., the state oriented in the same or in the opposite direction with respect to the direction of the SQA) determined by a random number according to the probability.…”

Section: Introductionmentioning

confidence: 99%

Radiative polarization dynamics of relativistic electrons in an intense electromagnetic field

Tang

Gong

et al. 2021

Phys. Rev. A

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We propose a self-consistent model which utilizes the polarization vector to theoretically describe the evolution of spin polarization of relativistic electrons in an intense electromagnetic field. The variation of radiative polarization due to instantaneous no photon emission is introduced into our model, which extends the applicability of the polarization vector model derived from the nonlinear Compton scattering under local constant crossed-field approximation to the complex electromagnetic environment in laser plasma interaction. According to this model, we develop a Monte Carlo method to simulate the electron spin under the influence of radiation and precession simultaneously. Our model is consistent with the quantum physical picture that spin can only be described by a probability distribution before measurement, and it contains the entire information on the spin. The correctness of our model is confirmed by the successful reproduction of the Sokolov-Ternov effect and the comparison of the simulation results with other models in the literature. The results show the superiority in accuracy, applicability, and computational efficiency of our model, and we believe that our model is a better choice to deal with the electron spin in particle-in-cell simulation for laser plasma interaction.

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

Cited by 21 publications

References 34 publications

Generation of polarized particle beams at relativistic laser intensities

Generation of polarized particle beams at relativistic laser intensities

Charged particle motion and radiation in strong electromagnetic fields

Radiative polarization dynamics of relativistic electrons in an intense electromagnetic field

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