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Proceedings Paper

Sub-10-nm wavelength Ni-like-ion collisional x-ray lasers
Author(s): J. E. Balmer; F. Staub; C. Imesch; D. Bleiner
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Paper Abstract

We report on recent progress achieved in x-ray laser research at 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 x-ray lasing is demonstrated on the 4d → 4p, J = 0-1 line of Ba at a wavelength of 9.2 nm, using a main pulse energy of 9 J. A small-signal gain coefficient of ~30 cm-1 and a gain-length product of ~16 at saturation have been measured. Crucial to these results was the introduction of a second, relatively intense (~10%) prepulse less than ~100 ps before the 1.5-ps duration main pulse, in addition to the 2.8% prepulse that irradiated the target 2.4 ns earlier. Travelling-wave excitation was used throughout. For handling convenience, compound targets (BaF2, LaF3) were used, either in the form of windows or coated onto glass slides.

Paper Details

Date Published: 5 October 2011
PDF: 5 pages
Proc. SPIE 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX, 81400X (5 October 2011); doi: 10.1117/12.893582
Show Author Affiliations
J. E. Balmer, Univ. Bern (Switzerland)
F. Staub, Univ. Bern (Switzerland)
C. Imesch, Univ. Bern (Switzerland)
D. Bleiner, Univ. Bern (Switzerland)

Published in SPIE Proceedings Vol. 8140:
X-ray Lasers and Coherent X-ray Sources: Development and Applications IX
James Dunn; Annie Klisnick, Editor(s)

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