Fast electron beam with manageable spotsize from laser interaction with the tailored cone-nanolayer target

Wang, Huan; Cao, Lihua; Zhao, Ziqi; Yu, M. Y.; Gu, Yuqiu; He, X. T.

doi:10.1017/s0263034612000493

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…Zheng et al proposed and simulated a "slice cone" target [29] attributing the accelerated electrons to a similar mechanism. 2D simulations on similar shaped nanobrush targets have also been published [30][31][32][33][34][35][36].…”

Section: B Target Designmentioning

confidence: 99%

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

et al. 2014

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We report the results of a study of the role of prescribed geometrical structures on the front of a target in determining the energy and spatial distribution of relativistic laser-plasma electrons. Our 3D PIC simulation studies apply to short-pulse, high intensity laser pulses, and indicate that a judicious choice of target front-surface geometry provides the realistic possibility of greatly enhancing the yield of high energy electrons, while simultaneously confining the emission to narrow (< 5• ) angular cones.

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Section: B Target Designmentioning

confidence: 99%

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

et al. 2014

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“…For a flat solid foil target irradiated by the incident laser, the laser pulse is largely reflected at the plasma critical density. By contrast, a nanowire target which has a stack of thin plasma layers at subwavelength spacing grown on a thin metallic substrate (Cao et al 2010;Wang et al 2012;Yu et al 2012) is beneficial to generate more hot electrons. The complex geometry enables the laser pulse to interact for an extended distance with the inner volume of the target.…”

Section: Introductionmentioning

confidence: 99%

Enhanced proton acceleration from laser interaction with curved surface nanowire targets

Chao

Liu

et al. 2023

J. Plasma Phys.

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A novel curved surface nanowire target is proposed to improve the cutoff energy of accelerated protons via target normal sheath acceleration. The interaction of a laser of intensity $1.37\times 10^{20}\ {\rm W}\ {\rm cm}^{-2}$ with a curved surface nanowire target is studied by two-dimensional particle-in-cell simulations. The numerical results indicate that the sheath electric field at the target rear side is significantly enhanced by this simple target design, compared with using the planar nanowire target. The transverse motion of hot electrons is effectively confined and the energy density of electrons is naturally increased. A series of simulations with various target parameters is carried out to investigate the performance of this novel target. This tailored target may provide implications for generating high-quality proton beams in experiments.

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“…To optimize the interactions of laser pulses and targets, several novel targets with structured surface, such as metal nanobrushes [7][8][9][10][11][12][13][14][15], carbon nanotubes [16][17][18], silicon [19][20][21][22][23][24] and oxide nano/microwires [25] are proposed to improve the quality of laser-driven fast electron beams, proton acceleration and x-ray emission [15,26,27]. Many experiments [11][12][13][17][18][19] and relevant simulations [7,8,[28][29][30][31] on femtosecond laser facilities have demonstrated that tailored nano-array structures are helpful to enhance the absorption efficiency of laser energy as well as to guide the propagation of fast electrons. It is believed that the increased absorption depth, surface-to-volume ratio and high local electric fields of these kinds of targets can contribute to the enhancement of laser absorption, thus greatly enhancing the temperature of hot electrons and hard x-ray generation [7,11,15,32].…”

Section: Introductionmentioning

confidence: 99%

Manipulation and optimization of electron transport by nanopore array targets

Yang¹,

Li²,

Wu³

et al. 2020

Plasma Sci. Technol.

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The transport of sub-picosecond laser-driven fast electrons in nanopore array targets is studied. Attributed to the generation of micro-structured magnetic fields, most fast electron beams are proven to be effectively guided and restricted during the propagation. Different transport patterns of fast electrons in the targets are observed in experiments and reproduced by particle-in-cell simulations, representing two components: initially collimated low-energy electrons in the center and high-energy scattering electrons turning into surrounding annular beams. The critical energy for confined electrons is deduced theoretically. The electron guidance and confinement by the nano-structured targets offer a technological approach to manipulate and optimize the fast electron transport by properly modulating pulse parameters and target design, showing great potential in many applications including ion acceleration, microfocus x-ray sources and inertial confinement fusion.

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Fast electron beam with manageable spotsize from laser interaction with the tailored cone-nanolayer target

Cited by 5 publications

References 27 publications

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

Effects of front-surface target structures on properties of relativistic laser-plasma electrons

Enhanced proton acceleration from laser interaction with curved surface nanowire targets

Manipulation and optimization of electron transport by nanopore array targets

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