Detailed study of the effect of a short prepulse on soft X-ray spectra generated by a high-intensity KrF* laser pulse

Teubner, U.; Kuehnle, Goetz; Schaefer, F. P.

doi:10.1007/bf00325515

Cited by 47 publications

(16 citation statements)

References 24 publications

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“…Previous studies have shown the strong influence of a poor energy contrast ratio between the laser pedestal and the short pulse on the x-ray pulse duration in the soft xray range [44] and on conversion efficiency [12,45,46]. Rippling of the target surface [47] by ASE removes the p-polarized radiation requirement for resonance absorption.…”

Section: Introductionmentioning

confidence: 96%

EfficientKα x-ray source from femtosecond laser-produced plasmas

et al. 1994

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We have performed a detailed quantitative study of the intense electron pulse produced by nonlinear absorption during ultrafast laser-solid interaction at near normal incidence. The resulting Ea x-ray lines have been investigated by time-integrated spectroscopy in the 1-4 keV range and by Monte Carlo simulations of hot electron energy penetration in Al-Si02 and Al-CaF2 targets. Calibration of the observed electron fluence and Ea line intensities was provided by direct monoenergetic electron beam interaction with the same target. Optimum conditions for hot electron production were obtained by setting the prepulse energy fluence close to the target damage threshold. Results indicate that Ea lines were produced by a distribution function of hot electrons which carry 12% of the incident laser energy with a characteristic temperature of about 8 keV. Spectrally and spatially resolved Ea emission measurements using a cooled charge-coupled-device detector demonstrate the scaling capabilities of this x-ray source to energies in excess of 6 keV.

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Section: Introductionmentioning

confidence: 96%

EfficientKα x-ray source from femtosecond laser-produced plasmas

et al. 1994

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“…The influence of a prepulse in the X-ray generation has been proved in several experiments (see for example [35][36][37][38][39][40][41][42][43]). The observed enhancement is related with the increased coupling of the stronger second laser pulse with an expanding plasma -created by the first weaker pulse-from the target surface.…”

Section: X-ray Emission By Double Pulsesmentioning

confidence: 99%

X-ray emission from a liquid curtain jet when irradiated by femtosecond laser pulses

et al. 2017

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Laser-based sources of ionizing radiation have attracted a considerable attention in the last years for their broad potential applications. However the stability and robustness of such sources is still an issue that needs to be addressed. Aiming to solve such problems, we propose a source that uses a liquid jet -rather than a solid-as a target for the production of X-rays. Liquid jets offer always a clean surface for every laser shot which represent a clear advantage over solids. In this work, we present an experimental characterization of the X-ray emission of such targets, and study the efficiency of the process when two temporally delayed pulses are used. According to the obtained results, the X-ray yield is comparable with commonly used targets.

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“…Anyhow, the most intense lines can be observed, and the doublet at 16 nm [21] allows a resolution estimate. Initially, only the well-characterized HiTRaX spectrometer indicated the spectral position of the observed lines.…”

Section: Xuv Emission Spectra and Dispersion Functionsmentioning

confidence: 99%

In-situ determination of dispersion and resolving power in simultaneous multiple-angle XUV spectroscopy

et al. 2011

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We report on the simultaneous determination of non-linear dispersion functions and resolving power of three flat-field XUV grating spectrometers. A moderate-intense short-pulse infrared laser is focused onto technical aluminum which is commonly present as part of the experimental setup. In the XUV wavelength range of 10-19 nm, the spectrometers are calibrated using Al-Mg plasma emission lines. This cross-calibration is performed in-situ in the very same setup as the actual main experiment. The results are in excellent agreement with ray-tracing simulations. We show that our method allows for precise relative and absolute calibration of three different XUV spectrometers.

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Detailed study of the effect of a short prepulse on soft X-ray spectra generated by a high-intensity KrF* laser pulse

Cited by 47 publications

References 24 publications

EfficientKα x-ray source from femtosecond laser-produced plasmas

EfficientKα x-ray source from femtosecond laser-produced plasmas

X-ray emission from a liquid curtain jet when irradiated by femtosecond laser pulses

In-situ determination of dispersion and resolving power in simultaneous multiple-angle XUV spectroscopy

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