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1 November 1997 Imaging experiments of Ne-like x-ray lasers
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We discuss high resolution two-dimensional near-field images of the neon-like nickel and germanium x-ray laser obtained using the Asterix laser at the Max-Planck-Institute and the Nova laser at Lawrence Livermore National Laboratory. Our imaging diagnostic consisted of a concave multilayer mirror that imaged the output end of the x-ray laser line onto a backside illuminated x-ray CCD detector. A 25 micrometer thick wire positioned at the end of the target provided a spatial fiducial. With the Asterix iodine laser, a prepulse 5.23 ns before the main pulse, was used to irradiate slab targets. A great deal of structure was observed in the near field images, particularly in the J equals 0 - 1 emission. We observed a large difference in the spatial dependence of the J equals 0 - 1 and J equals 2 - 1 lines of germanium, with the J equals 2 - 1 emission peaking farther away from the original target surface. A larger prepulse moved the peak emission farther away from the target surface. For the Nova experiments we used a series of 100 ps pulses spaced 400 ps apart to illuminate a germanium target. We obtained high resolution images of both the J equals 0 - 1 and J equals 2 - 1 lines of Ge. these measurements are compared to hydrodynamic simulations coupled with atomic kinetics and including refraction effects.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Juan C. Moreno, Joseph Nilsen, Troy W. Barbee Jr., Luiz Barroca Da Silva, Ernst E. Fill, Yuelin Li, and Peixiang Lu "Imaging experiments of Ne-like x-ray lasers", Proc. SPIE 3156, Soft X-Ray Lasers and Applications II, (1 November 1997);


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