J. Phys. IV France
Volume 11, Numéro PR2, Juillet 2001
X-Ray Lasers 2000
Page(s) Pr2-137 - Pr2-141
7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-137-Pr2-141

DOI: 10.1051/jp4:2001226

Saturated X-ray lasing in nickel-like Sn at 12 nm

J.E. Balmer, M. Braud and F. Loewenthal

Institute of Applied Physics, University of Berne, Sidlerstr. 5, 3012 Berne, Switzerland

We report on the experimental demonstration of gain saturation on the [MATH], J = 0-1 transition in Ni-like Sn at 12.0 nm using a drive power of 280 GW in a 100-ps pulse. A 0.5% ("twin-0.25%") prepulse irradiated the flat slab targets 5 ns before the main pulse. The gain coefficient was measured to be 13.5 cm-1, and the gain-length product required for saturation was ~17. At a distance of 1.3 m from the target, the x-ray laser was recorded as an elliptically shaped spot with major and minor axes dimensions of 4.0 and 1.7 mm (FWHM), giving a beam divergence of 3.7 and 1.3 mrad in the directions parallel and perpendicular to the target surface, respectively.

© EDP Sciences 2001