Recent high-temporal-resolution nickellike x-ray laser experiments have yielded important insights into the output characteristics of picosecond-pumped x-ray lasers. However, current experimental observations do not fully explain the plasma dynamics, which is critical to gain generation within the x-ray laser medium. A numerical study of the nickellike silver x-ray laser has therefore been undertaken to complement our experimental results in an attempt to further our understanding of the processes at work in yielding the observed x-ray laser output. High gain coefficients existing with picosecond lifetimes are predicted, which is consistent with the short x-ray laser durations experimentally observed. The late onset of the continuum emission relative to the temporal peak of the x-ray laser output is explained as a sign of high electron density evolution near the target surface.
© 2003 Optical Society of America
(020.1670) Atomic and molecular physics : Coherent optical effects
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(320.5390) Ultrafast optics : Picosecond phenomena
(350.5400) Other areas of optics : Plasmas
Jaroslav Kuba, Raymond F. Smith, Djamel Benredjem, Clary Möller, Lee Upcraft, Robert King, Annie Klisnick, Ladislav Drška, Geoff J. Pert, and Jean-Claude Gauthier, "Modeling of the transient nickellike silver x-ray laser," J. Opt. Soc. Am. B 20, 208-214 (2003)