Emission direction of fast electrons in high-intensity laser interactions with solids

Zhang, J.; Li, Y.T.; Sheng, Zheng-Ming; Wei, Zhiyi; Dong, Quan; Lü, Xingqiang

doi:10.1016/j.hedp.2005.09.002

Cited by 9 publications

(1 citation statement)

References 21 publications

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“…Vacuum heating occurs when a laser pulse is incident onto the target at an oblique angle. The component of the laser electric field perpendicular to the target surface accelerates electrons nonadiabatically if the interface is sharp enough, leading to hot electrons emitted in a direction normal to the target 8 . Since different mechanisms lead to hot electrons with different spatial features, as illustrated in Fig.1, the absorption physics can be revealed by measuring the spatial distribution of hot electrons.…”

Section: Research Activitiesmentioning

confidence: 99%

Short Pulse Laser Absorption and Energy Partition at Relativistic Laser Intensities

Shepherd¹,

Chen²,

Ping³

et al. 2007

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We have performed experiments at the COMET and Calisto short pulse laser facilities to make the first comprehensive measurements of the laser absorption and energy partition in solid targets heated with an ultrashort laser pulse focused to relativistic laser intensities (>10 17 W/cm 2 ). The measurements show an exceedingly high absorption for P polarized laser-target interactions above 10 19 W/cm 2 . Additionally, the hot electron population is observed to markedly increase at the same intensity range. An investigation of the relaxation process was initiated using time-resolved K α spectroscopy. Measurements of the time-resolved K α radiation suggest a 10-20 ps relativistic electron relaxation time. However modeling difficulties of these data are apparent and a more detailed investigation on this subject matter is warranted.

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Section: Research Activitiesmentioning

confidence: 99%

Short Pulse Laser Absorption and Energy Partition at Relativistic Laser Intensities

Shepherd¹,

Chen²,

Ping³

et al. 2007

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Measurements of X-ray doses and spectra produced by picosecond laser-irradiated solid targets

Yang

Qiu

et al. 2017

Applied Radiation and Isotopes

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

Zhou

Cao

et al. 2009

Journal of Applied Physics

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A scheme to reduce the current loss of laser-driven energetic electron beams propagating in solid-density targets is proposed. In the scheme, two intense laser pulses irradiate the solid target consisting of two materials, one enveloping the other. Because of the resistivity and density gradients at the material interface, the first pulse generates tens of megagauss robust interface magnetic fields that can considerably reduce the divergence of the electron beam generated by the second pulse. It is shown that by using a coaxial gold-aluminum target instead of a simple gold target, beam current loss can be lowered by about 30%.

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Emission direction of fast electrons in high-intensity laser interactions with solids

Cited by 9 publications

References 21 publications

Short Pulse Laser Absorption and Energy Partition at Relativistic Laser Intensities

Short Pulse Laser Absorption and Energy Partition at Relativistic Laser Intensities

Measurements of X-ray doses and spectra produced by picosecond laser-irradiated solid targets

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

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