18 September 1995 KeV x-ray imaging of a fs laser plasma with a spherically curved crystal
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Abstract
Images of a 130fs laser produced Ta-plasma were obtained with a spherically curved Mica crystal in four narrow spectral bands simultaneously. These are to our knowledge the first published x-ray images of a fs plasma. Also Mica was used for the first time as the imaging crystal. The resolved plasma size in the experiment (50 micrometers (DOT) 90 micrometers ) agrees with ray-tracing calculations and corresponds to the actual source size in our current setup. The four spectral bands of imaging are due to the strong Mica reflectivity in higher Bragg diffraction orders. All contributing bands have an energy higher than 1keV. Several laser shots were accumulated to achieve the required flux on the detector. Source spectroscopy was conducted to verify the source emission and the plasma density during the interaction with the 130fs laser pulse. Based on our experimental data the luminosity of crystal imaging is compared to a pinhole camera.
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Kai Gaebel, Kai Gaebel, Robert E. Hannon, Robert E. Hannon, Steve E. Grantham, Steve E. Grantham, Martin C. Richardson, Martin C. Richardson, Masataka Kado, Masataka Kado, Gregory M. Shimkaveg, Gregory M. Shimkaveg, } "KeV x-ray imaging of a fs laser plasma with a spherically curved crystal", Proc. SPIE 2523, Applications of Laser Plasma Radiation II, (18 September 1995); doi: 10.1117/12.220975; https://doi.org/10.1117/12.220975
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