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 x-ray lasing has been obtained on the 4d → 4p, J = 0-1 lines of Ba and La at wavelengths of 9.2 and 8.85 nm, respectively, using main pumping pulse energies of 9 J (Ba) and 12 J (La). For handling convenience, compound targets (BaF2, LaF3) were used, either in the form of windows or coated onto glass slides. Crucial to these results was the introduction of a second, relatively intense (>10%) prepulse less than ~100 ps before the main pulse.
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Balmer, J.E., Imesch, C., Staub, F. (2011). Saturated XUV lasing down to 8.85 nm using the grazing-incidence scheme. In: Lee, J., Nam, C.H., Janulewicz, K.A. (eds) X-Ray Lasers 2010. Springer Proceedings in Physics, vol 136. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1186-0_8
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DOI: https://doi.org/10.1007/978-94-007-1186-0_8
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