102,266 research outputs found
PERFORMANCE OF A THINNED BACK-ILLUMINATED ION-IMPLANTED CCO AS DETECTOR FOR A NORMAL INCIDENCE EUV SPECTROGRAPH
No full textThe first application of a thinned back-illuminated ion-implanted and
laser annealed CCD as a detector for extreme ultraviolet spectroscopy is described.
The observed stigmatic spectra are in the 40-70 nm region and are produced by
the excitation of some noble gases in an open hollow cathode source installed in
a normal incidence toroidal grating spectrograph. The results are compared with
spectra obtained by other detector systems applied to the same instrumentation,
showing that the CCD offers a much greater detection capability than a system
using a converting scintillator and a comparable one with respect to a photon
counting detector
HIGH-RESOLUTION SOFT-X-RAY MONOCHROMATORS OF NEW DESIGN
No full textWe have applied the principle of sagittal focusing to obtain high-resolution soft-X-ray monochromators for application to undulators, as planned for the new generation of synchrotron radiation facilities. Grazing incidence optical configurations (like Czerny-Turner and those utilizing a grating with variable line spacing) are particularly attractive. These configurations have the advantage of using fixed entrance and exit slits. We have analyzed such configurations using sagittal focusing and have shown that the resolution obtainable is comparable with that of a spherical grating monochromator of similar size (which, by contrast, needs moving entrance and exit slits). © 1990
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
No full textOptical design of a grazing incidence spectrometer/monochromater with varied line-space flat grating for high-order harmonic diagnostic
No full text
RESPONSE ANALYSIS IN THE 300-ANGSTROM TO 2500-ANGSTROM SPECTRAL RANGE OF ULTRAVIOLET-ENHANCED CHARGE-COUPLED-DEVICES
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