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Journal ArticleDOI

X-ray generation from laser-produced plasmas and its atomic-number dependence

Noboru Nakano, +1 more
- 01 Apr 1983 - 
- Vol. 27, Iss: 4, pp 2168-2177
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TLDR
In this article, the x-ray generation from laser plasmas is performed by using a picosecond high-power laser and the intensity of emitted x rays shows a periodic variation as a function of the atomic number of target materials.
Abstract
Experimental studies of the x-ray generation from laser plasmas are performed by using a picosecond high-power laser The intensity of emitted x rays shows a periodic variation as a function of the atomic number of target materials Calculations based on the transient collisional-radiative model, rather than the conventional steady-state coronal model, are carried out Experimental and computational results show good agreement with each other, and indicate the importance of the transient nature of multiple-ionization processes The dependence of hot-electron temperature on the atomic number is briefly discussed

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Journal ArticleDOI

Development of a flat-field grazing-incidence XUV spectrometer and its application in picosecond XUV spectroscopy.

TL;DR: A new type of grazing-incidence spectrometer with a flat focal field is developed, and XUV spectroscopy in the extreme ultraviolet region ranging from 15 to 200 A is carried out, showing the importance of the transient treatment of picosecond laser-produced plasmas.
Journal ArticleDOI

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

TL;DR: In this article, the effect of a short prepulse on soft X-ray spectra from a plasma generated by a high intensity KrF* laser pulse (main pulse: 0.5 ps, intensity I�士main=5.3×1015 W/cm2) on flat targets of Al and Cu has been studied in detail.
Journal ArticleDOI

Soft x‐ray spectra produced by subpicosecond laser‐double‐pulses

Abstract: Soft x‐ray spectra generated on flat Al targets by a 500 fs KrF* laser pulse (intensity 5.3×1015 W/cm2), preceded by a prepulse of the same pulse duration, have been measured as a function of the pulse separation and the prepulse intensity. It was found that not only the total x‐ray emission was much stronger when the prepulse was present but, in particular, lines in the shorter wavelength region had a higher intensity than without prepulse, and were strongly dependent on the time separation between the prepulse and the main pulse.
Journal ArticleDOI

Study of soft‐x‐ray generation by laser‐heating solid and gaseous tantalum plasmas with subpicosecond pulses

TL;DR: In this article, the efficiency of x-ray emission in the 17-35 nm region from laser-heated solid and gaseous density Ta plasmas has been compared, and it was shown that an x−ray conversion efficiency of 0.4% from a solid density Ta plasma requires a laser fluence of 200 J/cm2 whereas the same efficiency in a gaseously Ta plasma with optimal density profile requires only 3 J/m2.
Journal ArticleDOI

Effect of laser pulse duration on short wavelength emission from femtosecond and picosecond laser‐produced Ta plasmas

TL;DR: In this article, the efficiency, duration, and spectral content of the emission from laser-produced Ta plasmas in the 10-71 nm spectral region have been measured for laser pulse durations ranging from 100 fs to 70 ps.
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