Reducing current loss of laser-driven fast electron beams propagating in solid-density plasmas

Zhou, C. T.; He, X. T.; Cao, J. M.; Wang, Xingang; Wu, S. Z.

doi:10.1063/1.3116728

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…In standard PIC simulation (Birdsall & Langdon, 1985), the size of each cell has to be smaller than the Debye length in order to avoid numerical instability. Recently, numerical techniques based on hybrid simulations have been extensively applied for the study of beam-plasma interactions (Welch et al, 2001;Davies, 2003;Honrubia et al, 2005;Campbell et al, 2005;Evans, 2006;Solodov et al, 2009;Zhou et al, 2009). In this work, we shall not consider the initial laser-cone interaction, which has been investigated by many authors (Gibbon, 2005;Cai et al, 2009;Wu et al, 2010).…”

Section: Physical Description and Simulationmentioning

confidence: 97%

Hot electron transport and heating in dense plasma core by hollow guiding

Zhou

Cai

et al. 2010

Laser Part. Beams

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A new scheme for cone-hollow-assisted fast ignition in inertial fusion is investigated. A hollow is attached to the tip of a conventional gold cone. The transport and heating of the high-current electrons propagating from the cone tip to the compressed fuel core along the hollow is investigated by two-dimensional hybrid simulation. Different hollow geometry sizes are examinized. It is shown that with proper hollow guiding, hot electrons can be collimated between the inner-walls of the hollow by the large interface magnetic fields appearing on the inner surface. When the beam electrons further propagate into the dense region, they are scattered into the gold hollow through collisions with the fuel electrons and ions. The resulting magnetic potential around the hollow then bends beam electrons along the gold hollow to reach the dense core.

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Section: Physical Description and Simulationmentioning

confidence: 97%

Hot electron transport and heating in dense plasma core by hollow guiding

Zhou

Cai

et al. 2010

Laser Part. Beams

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“…2 It usually relies on enhancement in the collimating magnetic field by properly tailoring the profiles of the laser pulse and/or the target. 10,[14][15][16][17][18] Recently, several schemes for reducing the lateral divergence of laser produced electron beams have been proposed based on the hybrid simulation results, such as the Vlasov-Fokker-Planck ͑VFP͒ simulation, 10,15 the hybrid fluid-particle-in-cell ͑HFPIC͒ simulation, 14,17 etc. The most recent experiments have shown that a structured target can indeed improve electron beam concentration.…”

Section: Effect Of Density Profile On Beam Control Of Intense Laser-gmentioning

confidence: 99%

“…This is also the physical mechanism that the previously proposed magnetic collimation schemes considered. 14,15,17 They mainly put emphasis on the normal collisional resistivity effect while neglecting the effect of the plasma density and the related anomalous resistivity, which is the main subject of this paper.…”

Section: Physical Model and Simulationmentioning

confidence: 99%

Effect of density profile on beam control of intense laser-generated fast electrons

Zhou

Zhu

2010

Physics of Plasmas

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Divergent relativistic electrons are produced during the intense laser interacting with overdense or solid targets. When these energetic electrons propagate through a structured two-layer target, a strong interface magnetic field will be generated due to the plasma density difference near the interface. This field will affect the motions of the electrons and can be utilized to control the beam divergence. In this paper, the effect of the target density profile on beam control is explored via a physical model as well as two-dimensional particle-in-cell simulations. It is shown that the fast electron number and forward current can be greatly concentrated and enhanced if the plasma density of the inner layer is suitably lower than that of the outer layer.

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The anisotropic plasma wave in the plasma turbulence

Azadboni

2022

Contributions to Plasma Physics

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In this paper, the influence of plasma turbulence due to the sheared and body stress flow on the dispersion characteristics of the transverse electromagnetic modes in strongly coupled plasma is analysed. Using kinetic theory and solving the scattering relationship for the Vlasov‐Maxwell system, the influence of plasma turbulence on the growth of the electromagnetic mode is investigated. The minimum value of the stress rate threshold for the growth rate of electromagnetic instability in the linear polarization is higher than that of circular polarization. It is shown that the instability growth rate maximum for the circular polarization is about 100 times higher than that of the linear polarization. In the circular polarization, the value minimum of the shear stress is 1.2 times the minimum volume of the body stress. For the linear polarization, the value minimum of the body stress is 1.5 times the minimum volume of the shear stress. Increasing the density gradient of plasma leads to a higher stress threshold rate, and the range of propagation angles of growing modes is limited. With increasing steps of the density gradient plasma in the low‐density corona, electromagnetic instability occurs at a higher stress flow.

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Reducing current loss of laser-driven fast electron beams propagating in solid-density plasmas

Cited by 6 publications

References 49 publications

Hot electron transport and heating in dense plasma core by hollow guiding

Hot electron transport and heating in dense plasma core by hollow guiding

Effect of density profile on beam control of intense laser-generated fast electrons

The anisotropic plasma wave in the plasma turbulence

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