Angular distribution of hot electrons incident on a laser-irradiated target

Kieffer, Jean‐Claude; Matte, J. P.; Pépin, H.; Decoste, R.

doi:10.1103/physreva.29.704

Cited by 8 publications

(2 citation statements)

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“…A similar calculation can also be used for the conversion efficiency of Bremsstrahlung emission. 15,16 Figure 4 shows K ␣ conversion efficiency R(T h ) calculated 16 for Ag as a function of the ratio E K /T h , where E K is the K ␣ photon energy. Thus using this curve, assuming E k /T h Ϸ1 and 4% of the laser energy transferred to hot electrons, the total expected K ␣ conversion efficiency, from laser light into characteristic emission, should be around 2ϫ10 Ϫ6 .…”

Section: Resultsmentioning

confidence: 99%

“…The observed value of temperature is very close to the temperature value typical for low Z targets measured in previous experiments under similar experimental conditions. 14 Assuming Maxwellian electron energy distribution and utilizing only continuum Bremsstrahlung spectra, one can estimate 15 that around 4% of the initial laser energy has been transferred to the hot electrons. The x-ray yield of the characteristic Ag K ␣ emission produced by such electron population can be theoretically estimated with a relatively simple model.…”

Section: Resultsmentioning

confidence: 99%

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Hard x-ray emission in high intensity femtosecond laser–target interaction

et al. 1999

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Hard x-ray spectra (10–100 keV) created in high contrast, 400 fs, laser pulse interaction with solid targets, have been studied for laser intensities in the 1017–1019 W/cm2 range. The target atomic numbers (Z) extended from Z=13 to Z=73. The measured conversion efficiency at Ag Kα emission line was 10−3% at 5×1018 W/cm2. It has been confirmed that the hot electron temperature increased as (Iλ2)1/3 and the fraction of laser energy in hot electrons follows scaling law of (Iλ2)3/4.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hard x-ray emission in high intensity femtosecond laser–target interaction

et al. 1999

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Atomic Physics and Non-Maxwellian Plasmas

Lamoureux

1993

Advances in Atomic, Molecular, and Optical Physics

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Uniformity and isotropy of the fast ion emission at a target surface irradiated by a CO2 laser

Decoste

Pascale

Kieffer

et al. 1986

The Physics of Fluids

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Filtered pinhole imaging is used to characterize spatially the fast ion emission at the target surface irradiated by a CO2 laser in a planar geometry. The bulk of the fast ions is found to be fairly well correlated with the lateral transport of hot electrons in the target plane, i.e., a large concentration of rather low-energy ions near the focal spot with total ion emission over a very large area. Higher-energy ions show large emission nonuniformities and very small local cone angles somewhat difficult to explain.

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Angular distribution of hot electrons incident on a laser-irradiated target

Cited by 8 publications

References 32 publications

Hard x-ray emission in high intensity femtosecond laser–target interaction

Hard x-ray emission in high intensity femtosecond laser–target interaction

Atomic Physics and Non-Maxwellian Plasmas

Uniformity and isotropy of the fast ion emission at a target surface irradiated by a CO2 laser

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