Characterization of a high-gain Ne-like Fe transient x-ray laser

Stephen J. Moon; James Dunn; Anatoly Ya. Faenov; Tatiana A. Pikuz; Kevin B. Fournier; Albert L. Osterheld; Vyacheslav N. Shlyaptsev; Yuelin Li; Joseph Nilsen

doi:10.1117/12.366665

21 October 1999 Characterization of a high-gain Ne-like Fe transient x-ray laser

Stephen J. Moon, James Dunn, Anatoly Ya. Faenov, Tatiana A. Pikuz, Kevin B. Fournier, Albert L. Osterheld, Vyacheslav N. Shlyaptsev, Yuelin Li, Joseph Nilsen

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Proceedings Volume 3776, Soft X-Ray Lasers and Applications III; (1999) https://doi.org/10.1117/12.366665
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We present experimental results of a high efficiency Ne-like Fe transient collisional excitation x-ray laser using the COMET 15 TW table-top laser system at LLNL. The plasma formation, ionization and collisional excitation of the x- ray laser have been optimized using two sequential laser pulses: a plasma formation beam with 5 J energy of 600 ps duration and a pump beam with 5 J energy of 1.2 ps duration. Since the observation of strong lasing on the 255 angstroms 3p - 3s J equals 0 - 1 transition of Ne-like Fe, we have achieved high gains of 35 cm^-1 and saturation of the x-ray laser. A five-stage traveling wave excitation enhances the strongest Fe 3p - 3s 255 angstroms lasing line as well as additional x-ray lines. A careful characterization of the plasma column conditions using L-shell spectroscopy indicates the degree of ionization along the line focus.

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Stephen J. Moon, James Dunn, Anatoly Ya. Faenov, Tatiana A. Pikuz, Kevin B. Fournier, Albert L. Osterheld, Vyacheslav N. Shlyaptsev, Yuelin Li, and Joseph Nilsen "Characterization of a high-gain Ne-like Fe transient x-ray laser", Proc. SPIE 3776, Soft X-Ray Lasers and Applications III, (21 October 1999); https://doi.org/10.1117/12.366665

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KEYWORDS

X-ray lasers

Plasma

Iron

Picosecond phenomena

Spectroscopy

Ionization

Comets

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