Quasistatic magnetic and electric fields generated in intense laser plasma interaction

Qiao, B.; Zhu, Shun‐Peng; Zheng, Chunyang; Xie, He

doi:10.1063/1.1889090

Cited by 41 publications

(23 citation statements)

References 25 publications

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“…The study of the modulation instabilities of electromagnetic waves can be significant in fast ignition scheme for ICF [11]. Recent experiments [26] and simulation studies [27,28] have confirmed that self-generated magnetic fields increase with the laser intensity, the effects observed under the present study are expected to become more significant for relativistic laser beams interacting with magnetized plasma.…”

Section: Discussionsupporting

confidence: 73%

Modulation instability by intense laser beam in magnetized plasma

Chen

Liu

2011

Optik

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Section: Discussionsupporting

confidence: 73%

Modulation instability by intense laser beam in magnetized plasma

Chen

Liu

2011

Optik

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“…In this case, E Sr = E Sy = ( , where B 0 is the amplitude of the magnetic field and can be obtained from the simulation results [27,28]. Then the equations of motion for the test electron can be written as dp…”

mentioning

confidence: 99%

Injection dynamics of direct-laser-accelerated electrons in a relativistically transparent plasma

Jiang¹,

Zhou²,

Huang³

et al. 2018

Phys. Rev. E

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The dynamics of electron injection in the direct laser acceleration (DLA) regime was investigated by means of three-dimensional particle-in-cell simulations and theoretical analysis. It is shown that when an ultra-intense laser pulse propagates into a near-critical density or relativistically transparent plasma, the longitudinal charge-separation electric field excites an ion wave. The ion wave modulates the local electric field and acts as a set of potential wells to guide the electrons, located on the edge of the plasma channel, to the central region, where the DLA takes place later on. In addition, it is pointed out that the self-generated azimuthal magnetic fields tend to suppress the injection process of electrons by deflecting them away from the laser field region. Understanding these physical processes paves the way for further optimizing the properties of direct-laser accelerated electron beams and the associated X/gamma-ray sources.High-energy electron beams are attractive for many applications ranging from fast ignition of inertial confinement fusion [1], radiography [2], and novel light sources [3][4][5], to neutron sources [6]. With the ability of supporting huge accelerating electric fields (above 100 GV/m), the laser-based plasma accelerators, which are promising to revolutionize the conventional accelerator technologies, recently have attracted much research attention. Based on laser-plasma interactions, two distinct regimes have been proposed to produce high-energy electron beams, which are known as the laser wake-field acceleration (LWFA) and the direct laser acceleration (DLA). In LWFA regime, so far quasi-monoenergetic electron beams with energies up to several GeV have been obtained [7][8][9][10][11]. However, the rather low-density plasma (typically less than 10 20 cm −3 ) used in this scheme generally limits the charges of accelerated electrons to about 100 pC, which makes this regime infeasible for many applications that requires high-charge electron beams.The DLA regime becomes dominant for electron acceleration in relatively high density plasmas, and in this regime high-charge (higher than 10 nC) electron beams with energies up to hundreds of MeV have been obtained [12]. This regime occurs when the betatron oscillation frequency of the electrons in the laser-produced plasma channel is equal to the Doppler-shifted laser frequency [13]. Recently, several different schemes have been proposed to enhance the electron energy in this regime [14][15][16]. So far little attention has been paid to the injection process of the electrons in this regime [17,18], which plays a significant role on the subsequent electron acceleration process and determines the qualities of the accelerated electrons. In particular, the DLA electron beams usually display as broad energy spectra. Understanding the injection mechanism is an important step to optimize and improve the electron beam qualities in this regime. The injection process of electrons in the plasma channel seems complicated and chaotic [12,19], and onl...

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“…5,6 Analytical modelling of the selfgenerated electromagnetic fields in the laser-plasma interaction are also useful for estimating the contribution of these fields in laser-driven particle acceleration. [10][11][12] In this paper we focus our attention on the laser-plasma interaction in the bubble regime. In particular, we study the electron cavity and the corresponding electromagnetic fields by means of an analytical model partially based on the results of PIC simulations.…”

Section: Analysis Of the Electromagnetic Fields And Electron Acceleramentioning

confidence: 99%

Analysis of the electromagnetic fields and electron acceleration in the bubble regime of the laser-plasma interaction

Xie

Wang

et al. 2007

Physics of Plasmas

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An analytical model for the electromagnetic fields in the bubble regime of the interaction of ultrahigh-intensity laser with plasma is given. The two-dimensional model is based on the results of particle-in-cell simulation and includes the bubble front region. It is used to consider the generation of dense ultrashort quasimonoenergetic high-energy electron bunches. The resulting bunch parameters agree fairly well with those from the simulation.

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Quasistatic magnetic and electric fields generated in intense laser plasma interaction

Cited by 41 publications

References 25 publications

Modulation instability by intense laser beam in magnetized plasma

Modulation instability by intense laser beam in magnetized plasma

Injection dynamics of direct-laser-accelerated electrons in a relativistically transparent plasma

Analysis of the electromagnetic fields and electron acceleration in the bubble regime of the laser-plasma interaction

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