23 October 2002 Formation of quasi-monochromatic soft x-ray radiation from laser-produced plasmas
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Abstract
This paper describes a simple method for formation of quasi-monochromatic soft x-ray radiation from laser-produced plasmas. The method uses a special combination of laser target materials and x-ray filters. Targets with middle atomic numbers Za~10-25 are chosen, so hydrogen- and helium-like ions ([H]- and [He]-like ions) are excited in the laser-produced plasmas. The x-ray K-absorption filters isolate only a few lines in the spectrum: resonance lines and corresponding satellites of [H]- and [He]-like ions. These lines occupy a narrow spectral band λ/δλ=10-100. The contribution of continuum radiation out of the separated spectral band is studied theoretically and experimentally. It is shown that the continuum radiation contribution does not exceed 20% of the line radiation intensity. The method of formation of quasi-monochromatic soft x-ray radiation is used for reflectometry (measurements of crystal reflectivity, calibration of crystal spectrometers and x-ray detectors) and for radiometry (absolute radiatin yield measurements) of laser-produced plasmas.
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Alexander P. Shevelko, Israel L. Beigman, Larry V. Knight, "Formation of quasi-monochromatic soft x-ray radiation from laser-produced plasmas", Proc. SPIE 4781, Advances in Laboratory-Based X-Ray Sources and Optics III, (23 October 2002); doi: 10.1117/12.450461; https://doi.org/10.1117/12.450461
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KEYWORDS
Ions

X-rays

Optical filters

Plasmas

Crystals

Absorption filters

Calibration

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