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Proceedings Paper

Sub-10-nm Ni-like soft-x-ray lasers
Author(s): F. Jia; F. Staub; J. E. Balmer
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Paper Abstract

We report on recent progress achieved in X-ray laser research at the Institute of Applied Physics of the University of Bern. Using the existing 10-TW Nd:glass CPA (chirped-pulse amplification) laser system in the grazing-incidence pumping (GRIP) scheme, saturated or near-saturated soft-X-ray lasing has been obtained on the 4d→4p, J = 0-1 lines of barium (Ba, Z = 56), lanthanum (La, Z = 57), and samarium (Sm, Z = 62) at wavelengths down to 7.36 nm, with weak lasing observed at 6.85 nm in Sm. This was achieved with main pulse energies of ~10 J at a pulse duration of 1.5 ps. A small-signal gain coefficient of ~30 cm-1 and a gain-length product of ~16 at saturation have been measured in the case of the 9.2-nm Ba laser. Crucial to these results was the introduction of a second, relatively intense (~20%) prepulse less than 50 ps before the main pulse, in addition to the 2.8% prepulse that irradiated the target ~3 ns earlier. Travelling-wave excitation was used throughout.

Paper Details

Date Published: 30 September 2013
PDF: 5 pages
Proc. SPIE 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X, 884903 (30 September 2013); doi: 10.1117/12.2023283
Show Author Affiliations
F. Jia, Univ. of Bern (Switzerland)
F. Staub, Univ. of Bern (Switzerland)
J. E. Balmer, Univ. of Bern (Switzerland)

Published in SPIE Proceedings Vol. 8849:
X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X
Annie Klisnick; Carmen S. Menoni, Editor(s)

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