12 December 2001 Recent x-ray laser experiments on the COMET facility
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Abstract
The development of the transient collisional excitation x-ray laser scheme using tabletop laser systems with multiple pulse capability has progressed rapidly in the last three years. The high small-signal gain and strong x-ray output have been demonstrated for laser drive energies of typically less than 10 J. We report recent x-ray laser experiments on the Lawrence Livermore National Laboratory (LLNL) Compact Multipulse Terawatt (COMET) tabletop facility using this technique. In particular, the saturated output from the Ni-like Pd ion 4d - 4p x-ray laser at 146.8 angstrom has been well characterized and has potential towards a useable x-ray source in a number of applications. One important application of a short wavelength x-ray laser beam with picosecond pulse duration is the study of a high density laser-produced plasma. We report the implementation of a Mach-Zehnder type interferometer using diffraction grating optics as beam splitters designed for the Ni-like Pd laser and show results from probing a 600 ps heated plasma. In addition, gas puff targets are investigated as an x-ray laser gain medium and we report results of strong lasing on the n equals 3 - 3 transitions of Ne-like Ar.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James Dunn, Raymond F. Smith, Joseph Nilsen, Jim R. Hunter, Troy W. Barbee, Vyacheslav N. Shlyaptsev, Jorge Filevich Chamatropulos, Jorge J. G. Rocca, Mario C. Marconi, Henryk Fiedorowicz, Andrzej Bartnik, "Recent x-ray laser experiments on the COMET facility", Proc. SPIE 4505, Soft X-Ray Lasers and Applications IV, (12 December 2001); doi: 10.1117/12.450575; https://doi.org/10.1117/12.450575
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KEYWORDS
X-ray lasers

Plasma

Picosecond phenomena

Mirrors

Palladium

X-rays

Comets

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