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12 December 2001 Advances in capillary discharge soft x-ray laser research
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Abstract
This paper gives an overview of recent soft x-ray laser research at Colorado State University. Progress related to capillary discharge source development includes the observation of emission from the 13.2-nm laser line of Nickel-like Cd in a plasma column generated by a high power capillary discharge. This result suggests it might be possible to extend capillary discharge lasers to significantly shorter wavelengths. In another approach to the generation of coherent soft x-ray radiation we analyzed the possibility of amplifying high order harmonic pulses in a discharge-pumped amplifier. The study of the already well- characterized 46.9-nm Ne-like Ar laser was extended with new spatial coherence and laser wavefront measurements, in work conducted in collaboration with U. California Berkeley and U. of Paris-Sud groups. In the field of applications, we have extended our previous results of plasma interferometry with a tabletop laser to plasma densities up to 0.9 x 1021 cm-3. Sequences of soft x-ray laser interferograms of plasmas generated by a Nd-YAG laser at intensities between 1 x 1011 W cm-2 and 7 x 1012 W cm-2 show the development and evolution of a concave electron density profile. The detailed mapping of this phenomenon with soft x-ray interferometry exemplifies the usefulness of compact soft x-ray lasers in increasing the understanding of high density plasmas.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jorge J. G. Rocca, Juan L. A. Chilla, Sava Sakadzic, Abdur Rahman, Jorge Filevich Chamatropulos, Ela Jankowska, Eric Hammarsten, Bradley M. Luther, Henry C. Kapteyn, Margaret M. Murnane, and Vyacheslav N. Shlyaptsev "Advances in capillary discharge soft x-ray laser research", Proc. SPIE 4505, Soft X-Ray Lasers and Applications IV, (12 December 2001); https://doi.org/10.1117/12.450574
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