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Proceedings Paper

Efficient pumping schemes for high average brightness collisional x-ray lasers
Author(s): Roisin Keenan; James Dunn; Vyacheslav N. Shlyaptsev; Raymond F. Smith; Pravesh K. Patel; Dwight F. Price
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Paper Abstract

Advances in transient collisional x-ray lasers have been demonstrated over the last 5 years as a technique for achieving tabletop soft x-ray lasers using 2 - 10 J of laser pump energy. The high peak brightness of these sources operating in the high output saturation regime, in the range of 1024 - 1025 ph. mm-2 mrad-2 s-1 (0.1% BW) -1, is ideal for many applications requiring high photon fluence in a single short burst. However, the pump energy required for these x-ray lasers is still relatively high and limits the x-ray laser repetition rate to 1 shot every few minutes. Higher repetition rate collisional schemes have been reported and show some promise for high output in the future. We report a novel technique for enhancing the coupling efficiency of the laser pump into the gain medium that could lead to enhanced x-ray inversion with a factor of ten reduction in the drive energy. This has been applied to the collisional excitation scheme for Ni-like Mo at 18.9 nm and x-ray laser output has been demonstrated. Prelimanry results show lasing on a single shot of the optical laser operating at 10 Hz and with 70 mJ in the short pulse. Such a proposed source would have higher average brightness, ~1014 ph. mm-2 mrad-2 s-1 (0.1% BW) -1, than present bending magnet 3rd generation synchrotron sources operating at the same spectral range.

Paper Details

Date Published: 19 December 2003
PDF: 8 pages
Proc. SPIE 5197, Soft X-Ray Lasers and Applications V, (19 December 2003); doi: 10.1117/12.504918
Show Author Affiliations
Roisin Keenan, Lawrence Livermore National Lab. (United States)
James Dunn, Lawrence Livermore National Lab. (United States)
Vyacheslav N. Shlyaptsev, Univ. of California/Davis (United States)
Raymond F. Smith, Lawrence Livermore National Lab. (United States)
Pravesh K. Patel, Lawrence Livermore National Lab. (United States)
Dwight F. Price, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 5197:
Soft X-Ray Lasers and Applications V
Ernst E. Fill; Szymon Suckewer, Editor(s)

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