1,721,081 research outputs found
Two Laser-Produced Plasmas Method for Absorption Spectra and Photoionization Cross-Sections Measurements on Light Ions in the VUV and Soft X-Ray Spectral Range
No full textThe method of using two laser produced plasmas, one acting as background continuum radiation source, the other as absorbing medium, for obtaining the absorption spectra and for measuring the photoionization cross-sections of low-Z ionic species is described. The basic principles of the experiment are discussed. The advantages of some technical solutions, like the use of stigmatic technique in VUV and XUV spectral regions, the use of detecting system using photodiode arrays, and the constrained deconvolution procedure adopted in data processing, are emphasized
The UltraViolet Coronagraph Spectrometer on Board the Solar and Heliospheric Observatory
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Beam-splitting and recombining of the radiation from an EUV Free Electron Laser by means of reflection gratings
No full textNew test facility for reflectivity and transmission measurements in the extreme UV spectral region
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Laser-produced plasma stigmatic observations in the extreme ultraviolet by means of a CCD detector
No full textObservations of the emission from laser-produced plasmas of carbon,
aluminum and tungsten have been performed by means of a vacuum normalincidence
stigmatic spectrograph. The detector used is a Peltier-cooled CCD,
particularly treated so to be sensitive in the vacuum ultraviolet spectral range. The
presented results include the spectrum emitted, in the range from 380 to 800 Å, with
spectral and spatial profiles along the expanding plasmas and absolute
measurements of the plasma brightness. The measurements show an outstanding
capability of this type of detector, in terms of sensitivity, resolution and dynamic
range, with respect to traditional devices, for UV detection, as photographic film,
intensified linear arrays and scintillator coated CCDs
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