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21 October 1999 Tabletop transient collisional excitation x-ray lasers
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Recent transient collisional excitation x-ray laser experiments are reported using the COMET tabletop laser driver at the Lawrence Livermore National Laboratory. Ne- like and Ni-like ion x-ray laser schemes have been investigated with a combination of long 600 ps and short approximately 1 ps high power laser pulses with 5 - 10 J total energy. We show small signal gain saturation for x-ray lasers when a reflection echelon traveling wave geometry is utilized. A gain length product of 18 has been achieved for the Ni-like Pd 4dyields4p J equals 0 - 1 line at 147 angstroms, with an estimated output of approximately 10 (mu) J. Strong lasing on the 119 angstroms Ni-like Sn line has also been observed. To our knowledge this is the first time gain saturation has been achieved on a tabletop laser driven scheme and is the shortest wavelength table-top x-ray laser demonstrated to date. In addition, we present preliminary results of the characterization of the line focus uniformity for a Ne-like ion scheme using L-shell spectroscopy.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James Dunn, Yuelin Li, Albert L. Osterheld, Joseph Nilsen, Stephen J. Moon, Kevin B. Fournier, Jim R. Hunter, Anatoly Ya. Faenov, Tatiana A. Pikuz, and Vyacheslav N. Shlyaptsev "Tabletop transient collisional excitation x-ray lasers", Proc. SPIE 3776, Soft X-Ray Lasers and Applications III, (21 October 1999);


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