X-ray laser experiments using laser-vaporized copper-foil plasmas

@article{Elton1987XrayLE,
  title={X-ray laser experiments using laser-vaporized copper-foil plasmas},
  author={Raymond C. Elton and T. N. Lee and William A. Molander},
  journal={Journal of The Optical Society of America B-optical Physics},
  year={1987},
  volume={4},
  pages={539-546}
}
Recent exploratory experiments used laser-vaporized copper films in a search for gain on 3s–3p transitions in neonlike Cu xx plasmas. The Naval Research Laboratory Pharos iii laser was operated at 100–330 J with mostly 2-nsec pulses. The plasma length, the laser energy and pulse shape, and the copper thickness were varied. Vacuum-ultraviolet and x-ray spectroscopy and pinhole photography measured axial emission, homogeneity, front–rear symmetry, and electron temperature. A novel slotted-copper… 

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References

SHOWING 1-10 OF 24 REFERENCES

Techniques And Initial Results From An X-Ray Laser Experiment Using Laser-Vaporized Copper Foil Plasmas

A series of exploratory experiments recently carried out at NRL were directed towards the possible utilization of laser-heated ultra-thin copper films for generating elongated plasmas of sufficient

Hydrodynamic Aspects of the Split-Foil Laser Target Design.

Abstract : Hydrodynamic simulations of exploding copper foils, which are irradiated on one side by 1.06 micron laser light, indicated that peak axial electron number density is more easily controlled

X‐ray spectroscopic diagnostics of a copper plasma produced by a laser line focused onto a thin foil

A 500‐J, 2–6‐ns, Nd laser was focused to a 100‐μm‐wide line on a thin (375–1500 A) copper film of 4–23 mm length, supported by a 1500‐A thick Formvar substrate. Space‐resolved 8–16‐A wavelength x‐ray

Extension of 3p ? 3s ion lasers into the vacuum ultraviolet region.

The feasibility of extending existing near-ultraviolet ion lasers into the vacuum ultraviolet spectral region is analyzed with a simplified three-state model. Single-pass amplification in a

A spectroscopic study of the recombination of C6 + to C5 + in an expanding laser-produced plasma

The Lyman spectrum of carbon VI from the expansion plume of a laser-produced plasma has been interpreted to give the absolute distribution of electrons amongst bound and free energy states. Local

Quasi-stationary population inversion on Kalpha transitions.

TLDR
In a search for an x-ray laser capable of operating in a quasi-cw mode, a suggested Kalpha-innershell scheme is examined using recently calculated rates and it is concluded that photoionization pumping in a selective energy band is required, with emission approaching the blackbody level.

Spectra in the period between copper and bromine produced with the aid of a 4 GW laser

Spectroscopic observations of plasmas produced when the output of a 4 GW neodymium laser was focused onto solid targets of elements in the period between copper and molybdenum have led to line