Sketch of the experimental setup.
Left scale: X-ray signal measured into the line as a function of the focal depth . Clusters are irradiated by FWHM and laser pulses. Black triangles: with upstream pressure. White circles: . Black squares: . Full line and right scale: corresponding profile of the total atomic density.
Spatially resolved measurements as a function of the focusing depth . Argon clusters ( average radius) are produced with , and irradiated by FWHM and laser pulses. Left: shadowgraphy measurements and right: x-ray pinhole images. Dashed line: jet axis and full line: edge of the jet. The laser propagates from the right to the left. The position expected for the focal plane under vacuum is indicated with arrows.
Black triangle: central position of the emitting plasma deduced from the x-ray pinhole images as a function of the focusing depth. Argon clusters are produced with , and irradiated by FWHM and laser pulses. White triangles: central position of the plasma deduced from the simulations at . The dashed line corresponds to and the full line to the edge of the jet.
(Color online) Simulations performed with FWHM, laser pulses propagating through the argon gas jet. The spatial repartition of the maximum laser intensity is reported near the focus. Left: without gas and right: with a gas jet that would be obtained with upstream pressure. Curves of iso-intensity are plotted and expressed in watts per square centimeter.
Article metrics loading...
Full text loading...