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Your search keyword '"Zhuo, H. B."' showing total 166 results
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166 results on '"Zhuo, H. B."'

1. Branching of high-current relativistic electron beam in porous materials

Author

Jiang, K., Huang, T. W., Li, R., Yu, M. Y., Zhuo, H. B., Wu, S. Z., Zhou, C. T., and Ruan, S. C.

Subjects
Physics - Plasma Physics, Physics - Computational Physics
Abstract

Propagation of high-current relativistic electron beam (REB) in plasma is relevant to many high-energy astrophysical phenomena as well as applications based on high-intensity lasers and charged-particle beams. Here we report a new regime of beam-plasma interaction arising from REB propagation in medium with fine structures. In this regime, the REB cascades into thin branches with local density hundred times the initial value and deposits its energy two orders of magnitude more efficiently than that in homogeneous plasma, where REB branching does not occur, of similar average density. Such beam branching can be attributed to successive weak scatterings of the beam electrons by the unevenly distributed magnetic fields induced by the local return currents in the skeletons of the porous medium. Results from a model for the excitation conditions and location of the first branching point with respect to the medium and beam parameters agree well with that from pore-resolved particle-in-cell simulations., Comment: 8 pages, 5 figures

Published
2023
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2. Branched flow of intense laser light in plasma with uneven density distribution

Author

Jiang, K., Huang, T. W., Wu, C. N., Yu, M. Y., Zhang, H., Wu, S. Z., Zhuo, H. B., Pukhov, A., Zhou, C. T., and Ruan, S. C.

Subjects
Physics - Plasma Physics, Physics - Optics
Abstract

Branched flow is an interesting phenomenon that can occur in diverse systems. It is usually linear in the sense that the flow does not alter the medium properties. Branched flow of light on thin films was recently discovered. A question of interest is thus if nonlinear branched flow of light can also occur. Here we found using particle-in-cell simulations that with intense laser propagating in plasma with randomly uneven density distribution, photoionization by the laser can locally enhance the density variations along the laser paths and thus the branching of the laser. However, too-intense lasers can smooth the uneven electron density and suppress branching. The observed branching properties agree well with an analysis based on a Helmholtz equation for the laser electric field. Branched flow of intense laser in uneven plasma potentially opens up a new realm of intense laser-matter interaction., Comment: 6 pages, 5 figures

Published
2021

4. Containing intense laser light in circular cavity with magnetic trap door

Author

Yang, X. H., Yu, W., Yu, M. Y., Xu, H., Ma, Y. Y., Sheng, Z. M., Zhuo, H. B., Ge, Z. Y., and Shao, F. Q.

Subjects
Physics - Plasma Physics
Abstract

It is shown by particle-in-cell simulation that intense circularly polarized (CP) laser light can be contained in the cavity of a solid-density circular Al-plasma shell for hundreds of light-wave periods before it is dissipated by laser-plasma interaction. A right-hand CP laser pulse can propagate almost without reflection into the cavity through a highly magnetized overdense H-plasma slab filling the entrance hole. The entrapped laser light is then multiply reflected at the inner surfaces of the slab and shell plasmas, gradually losing energy to the latter. Compared to that of the incident laser, the frequency is only slightly broadened and the wave vector slightly modified by appearance of weak nearly isotropic and homogeneous higher harmonics.

Published
2017
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5. Study of filamentation instability on the divergence of ultraintense laser-driven electrons

Author

Yang, X. H., Zhuo, H. B., Xu, H., Ge, Z. Y., Shao, F. Q., Borghesi, M., and Ma, Y. Y.

Subjects
Physics - Plasma Physics
Abstract

Generation of relativistic electron (RE) beams during ultraintense laser pulse interaction with plasma targets is studied by collisional particle-in-cell (PIC) simulations. Strong magnetic field with transverse scale length of several local plasma skin depths, associated with RE currents propagation in the target, is generated by filamentation instability (FI) in collisional plasmas, inducing a great enhancement of the divergence of REs compared to that of collisionless cases. Such effect is increased with laser intensity and target charge state, suggesting that the RE divergence might be improved by using low-Z materials under appropriate laser intensities in future fast ignition experiments and in other applications of laser-driven electron beams.

Published
2016

12. Relativistic high-order harmonic generation by a femto-second radially polarized laser pulse irradiating a ring plasma grating.

Author

Zhang, S J, Zhuo, H B, Yin, Y, Zou, D B, Zhao, N, and Zhou, W M

Subjects
*ATTOSECOND pulses, *TOROIDAL plasma, *HARMONIC generation, *LASER pulses, *PLASMA diagnostics, *LASER plasmas, *HIGH resolution imaging
Abstract

A novel scheme for generating relativistic high-order harmonics by a relativistic radially polarized laser interacting with a plasma annular grating is proposed. The particle-in-cell results show that the radial laser field can drive the relativistic electron bunches to oscillate radially in all azimuth directions, resulting in the emission of strong harmonics. Firstly, the interference of the laser field on the plasma grating structure significantly enhances the radiated harmonics which match the phase conditions. Secondly, due to the common ring symmetry of the grating structure and laser polarization, the transverse distribution of harmonics presents a Bessel form, and there is a sharp bright spot in the center with relativistic intensity. Such high-intensity short-wave structured harmonics have broad applications in areas such as plasma diagnostics, high resolution imaging and detection. [ABSTRACT FROM AUTHOR]

Published
2022
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17. Experimental Observation of Ion–Ion Acoustic Instability Associated with Collisionless Shocks in Laser-produced Plasmas

Author

Jiao, J. L., primary, He, S. K., additional, Zhuo, H. B., additional, Qiao, B., additional, Yu, M. Y., additional, Zhang, B., additional, Deng, Z. G., additional, Lu, F., additional, Zhou, K. N., additional, Wang, X. D., additional, Xie, N., additional, Yang, L., additional, Zhang, F. Q., additional, Zhou, W. M., additional, and Gu, Y. Q., additional

Published
2019
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18. Hundreds-GeV Au ion generation by 1022–24 W cm−2 laser pulses interacting with high-Z grain doped gas.

Author

Zhao, N, Zou, D B, Jiang, X R, Yu, T P, Yu, M Y, Liu, K, Huang, T W, Zhang, H, Wu, S Z, Hu, L X, Zhang, G B, Yin, Y, Shao, F Q, Zhuo, H B, and Zhou, C T

Subjects
ULTRASHORT laser pulses, LASER pulses, QUARK-gluon plasma, HEAVY ion collisions, NUCLEAR matter, RADIATION trapping
Abstract

Collision of intermediate-energy heavy ions is an important way to investigate the state of high-density nuclear matter and formation of quark gluon plasmas. In this paper, we demonstrate from two-dimensional particle-in-cell simulations that hundreds-GeV Au79+ ions can be generated by ultrashort ∼1022–24 W cm−2 lasers interacting with high-Z grain doped gas. Under extremely intense laser field, strong γ-ray radiation has resulted in massive laser energy loss, and the invoked radiation reaction trapping of electrons weakens the heavy ion acceleration. However, due to hole-boring acceleration and multi-body expansion acceleration of high-Z grains, the energy conversion efficiency from laser to heavy ions is still up to 32%. Our results might provide an effective routine to carry out the experimental explorations of heavy-ion collisions by using hundreds-petawatt laser facilities. [ABSTRACT FROM AUTHOR]

Published
2021
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27. Plasma optical shutter in ultraintense laser-foil interaction

Author

Wei, W. Q., primary, Yuan, X. H., additional, Fang, Y., additional, Ge, Z. Y., additional, Ge, X. L., additional, Yang, S., additional, Li, Y. F., additional, Liao, G. Q., additional, Zhang, Z., additional, Liu, F., additional, Chen, M., additional, Zhao, L., additional, Zhuo, H. B., additional, Li, Y. T., additional, Sheng, Z. M., additional, and Zhang, J., additional

Published
2017
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39. Directed fast electron beams in ultraintense picosecond laser irradiated solid targets

Author

Ge, X. L., primary, Lin, X. X., additional, Yuan, X. H., additional, Carroll, D. C., additional, Gray, R. J., additional, Yu, T. P., additional, Tresca, O., additional, Chen, M., additional, Liu, F., additional, Zhuo, H. B., additional, Zielbauer, B., additional, Zhao, L., additional, Neely, D., additional, Sheng, Z. M., additional, Li, Y. T., additional, and McKenna, P., additional

Published
2015
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