Imaging experiments of Ne-like x-ray lasers

Juan C. Moreno; Joseph Nilsen; Troy W. Barbee Jr.; Luiz Barroca Da Silva; Ernst E. Fill; Yuelin Li; Peixiang Lu

doi:10.1117/12.279417

1 November 1997 Imaging experiments of Ne-like x-ray lasers

Juan C. Moreno, Joseph Nilsen, Troy W. Barbee Jr., Luiz Barroca Da Silva, Ernst E. Fill, Yuelin Li, Peixiang Lu

Proceedings Volume 3156, Soft X-Ray Lasers and Applications II; (1997) https://doi.org/10.1117/12.279417
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.279417

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