10 research outputs found
Measurement of XUV-absorption spectra of ZnS radiatively heated foils
Get PDFTime-resolved absorption of zinc sulfide (ZnS) and aluminum in the XUV-range
has been measured. Thin foils in conditions close to local thermodynamic
equilibrium were heated by radiation from laser-irradiated gold spherical
cavities. Analysis of the aluminum foil radiative hydrodynamic expansion, based
on the detailed atomic calculations of its absorption spectra, showed that the
cavity emitted flux that heated the absorption foils corresponds to a radiation
temperature in the range 55 60 eV. Comparison of the ZnS absorption spectra
with calculations based on a superconfiguration approach identified the
presence of species Zn6+ - Zn8+ and S5+ - S6+. Based on the validation of the
radiative source simulations, experimental spectra were then compared to
calculations performed by post-processing the radiative hydrodynamic
simulations of ZnS. Satisfying agreement is found when temperature gradients
are accounted for
Plan de gestion du risque et toxicologie (application au Macugen® (pegaptanib sodium)
No full textCHATENAY M.-PARIS 11-BU Pharma. (920192101) / SudocSudocFranceF
X-ray opacity measurements in mid-Z dense plasmas with a new target design of indirect heating
No full textAbsorption spectroscopy of mid and neighboring Z plasmas: Iron, nickel, copper and germanium
No full textX-ray grating spectrometer for opacity measurements in the 50 eV to 250 eV spectral range at the LULI 2000 laser facility
No full textTheoretical interpretation of X-rays photo-absorption in medium-Z elements plasmas measured at LULI2000 facility
No full textOpacity of iron, nickel, and copper plasmas in the x-ray wavelength range: Theoretical interpretation of 2p-3d absorption spectra
No full textL-band x-ray absorption of radiatively heated nickel
No full textAbsorption of L-M and L-N transitions of nickel has been measured using point projection spectroscopy. The x-ray radiation from laser-irradiated gold cavities was used to heat volumetrically nickel foils "tamped with carbon" up to 20 eV. Experimental spectra have been analyzed with calculations based on the spin-orbit split arrays statistical approach and performed for each ionic species Ni5+ to Ni11+. Using a least- squares fit, this method provides an ion distribution broader than at local thermodynamic equilibrium, which is explained by spatial and temporal temperature gradients. A major improvement in the simulation of the absolute value of transmission is obtained with a resolved transition array statistical calculation that reproduces the experimental spectrum with the nominal areal mass density by taking into account the saturation of narrow lines
