Electron injection and acceleration in the plasma bubble regime driven by an ultraintense laser pulse combined with using dense-plasma wall and block

Zhao, Xueyan; Xie, Bai-Song; Wu, Hong; Zhang, Shan; Hong, Xue-Ren; Aimidula, Aimierding

doi:10.1063/1.3696822

Cited by 6 publications

(5 citation statements)

References 42 publications

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“…Another alternative scheme by using dense plasma wall and mini block can also trigger electron injection from the mini block, which departs transversely by about the bubble size. 21 Certainly, the injected electrons maybe not have exactly the same velocity of the bubble as the case we considered. So the cases mentioned above are approximately met to theoretical study and it needs further extensive PIC simulations to learn about them in detail.…”

Section: Discussion and Summarymentioning

confidence: 84%

“…In particular, the nonlinear dynamics of electrons plays a key role on the electron acceleration to produce a quasi-monoenergetic electron bunch in the bubble regime, where the ponderomotive force of laser pulse pushes away the plasma electrons, so that a nonlinear soliton-like structure of electron density, i.e., plasma cavity or bubble is formed. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] There is a very large space-charge separation electrostatic field in the bubble regime, which can efficiently trap and accelerate the electrons at the bottom of the bubble. For example, in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…20 We also proposed an optimizing alternative scheme with dense plasma wall and mini block to increase electron injection in the wake bubble. 21 These studies are strongly helpful to deepen the understanding of bubble electron acceleration, 12 however, in order to see clearly the physical process of electron injection as well as acceleration in bubble regime, it is still necessary and helpful to investigate theoretically the typical electrons trajectories in more detail.…”

Section: Introductionmentioning

confidence: 99%

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Electrons trajectories around a bubble regime in intense laser plasma interaction

Zhao

Xie

et al. 2013

Physics of Plasmas

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Some typical electrons trajectories around a bubble regime in intense laser plasma interaction are investigated theoretically. By considering a modification of the fields and ellipsoid bubble shape due to the presence of residual electrons in the bubble regime, we study in detail the electrons nonlinear dynamics with or without laser pulse. To examine the electron dynamical behaviors, a set of typical electrons, which locate initially at the front of the bubble, on the transverse edge and at the bottom of the bubble respectively, are chosen for study. It is found that the range of trapped electrons in the case with laser pulse is a little narrower than that without laser pulse. The partial phase portraits for electrons around the bubble are presented numerically and their characteristic behaviors are discussed theoretically. Implication of our results on the high quality electron beam generation is also discussed briefly. V C 2013 AIP Publishing LLC.

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Section: Discussion and Summarymentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrons trajectories around a bubble regime in intense laser plasma interaction

Zhao

Xie

et al. 2013

Physics of Plasmas

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“…One application of the laser-plasma interaction is the generation of the high brightness and the high-energy electron beams in which electrons with energy up to 4.2 GeV, 6-pC charge, and 0.3-mrad divergence have been produced from a 9-cm-long capillary discharge waveguide. [1][2][3][4][5][6][7][8][9][10][11][12] The propagation of an intense laser pulse in an under-dense plasma induces a plasma wake that is suitable for the acceleration of the electrons to relativistic energies. [13][14][15][16] The electrons with sufficient initial kinetic energy can ride the plasma wake, staying in phase with the longitudinal electric field inside the wake and gaining energy.…”

Section: Introductionmentioning

confidence: 99%

Pulse chirping effect on controlling the transverse cavity oscillations in nonlinear bubble regime

et al. 2017

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The propagation of an intense laser pulse in an under-dense plasma induces a plasma wake that is suitable for the acceleration of electrons to relativistic energies. For an ultra-intense laser pulse which has a longitudinal size shorter than the plasma wavelength, λ p , instead of a periodic plasma wave, a cavity free from cold plasma electrons, called a bubble, is formed behind the laser pulse. An intense charge separation electric field inside the moving bubble can capture the electrons at the base of the bubble and accelerate them with a narrow energy spread. In the nonlinear bubble regime, due to localized depletion at the front of the pulse during its propagation through the plasma, the phase shift between carrier waves and pulse envelope plays an important role in plasma response. The carrier-envelope phase (CEP) breaks down the symmetric transverse ponderomotive force of the laser pulse that makes the bubble structure unstable. Our studies using a series of two-dimensional (2D) particle-in-cell (PIC) simulations show that the frequency-chirped laser pulses are more effective in controlling the pulse depletion rate and consequently the effect of the CEP in the bubble regime. The results indicate that the utilization of a positively chirped laser pulse leads to an increase in rate of erosion of the leading edge of the pulse that rapidly results in the formation of a steep intensity gradient at the front of the pulse. A more unstable bubble structure, the self-injections in different positions, and high dark current are the results of using a positively chirped laser pulse. For a negatively chirped laser pulse, the pulse depletion process is compensated during the propagation of the pulse in plasma in such a way that results in a more stable bubble shape and therefore, a localized electron bunch is produced during the acceleration process. As a result, by the proper choice of chirping, one can tune the number of self-injected electrons, the size of accelerated bunch and its energy spectrum to the values required for practical applications.

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“…One application of the laser-plasma interaction is the generation of the high-energy electron beams in which the electrons with energy up to 4.2 GeV, 6 pC charge, and 0.3 mrad divergence have been produced from a 9-cm-long capillary discharge waveguide. [1][2][3][4][5][6][7][8][9][10][11][12] The propagation of an intense laser pulse in an under-dense plasma induces a plasma wake that is suitable for the acceleration of the electrons to relativistic energies. [13][14][15][16] The electrons with sufficient initial kinetic energy can ride the plasma wake, staying in phase with the longitudinal electric field inside the wake and gaining energy.…”

mentioning

confidence: 99%

The effect of a negatively chirped laser pulse on the evolution of bubble structure in nonlinear bubble regime

et al. 2016

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In the nonlinear bubble regime, due to localized depletion at the front of the pulse during its propagation through the plasma, the phase shift between carrier waves and pulse envelope plays an important role in plasma response. The Carrier-Envelope Phase (CEP) breaks down the symmetric transverse ponderomotive force of the laser pulse that makes the bubble structure unstable. Our studies using a series of two-dimensional particle-in-cell simulations show that the utilization of a negatively chirped laser pulse is more effective in controlling the pulse depletion rate, and consequently, the effect of the CEP in the bubble regime. The results indicate that the pulse depletion rate diminishes during the propagation of the pulse in plasma that leads to postponing the effect of Carrier-Envelope Phase (CEP) in plasma response, and therefore, maintaining the stability of the bubble shape for a longer time than the un-chirped laser pulse. As a result, a localized electron bunch with higher maximum energy is produced during the acceleration process.

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Electron injection and acceleration in the plasma bubble regime driven by an ultraintense laser pulse combined with using dense-plasma wall and block

Cited by 6 publications

References 42 publications

Electrons trajectories around a bubble regime in intense laser plasma interaction

Electrons trajectories around a bubble regime in intense laser plasma interaction

Pulse chirping effect on controlling the transverse cavity oscillations in nonlinear bubble regime

The effect of a negatively chirped laser pulse on the evolution of bubble structure in nonlinear bubble regime

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