7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-47-Pr2-50
DOI: 10.1051/jp4:2001208

Developments in X-ray laser pumping with travelling wave at Vulcan

R. Keenan¹, C.L.S. Lewis¹, S.J. Topping¹, G.J. Tallents², F. Strati², G.J. Pert², A. Klisnick³, D. Ros³, J. Kuba³, R. Smith³, P.V. Nickles⁴, K.A. Janulewicz⁴, F. Bortolotto⁴, A.G. MacPhee⁵, R.J. Clarke⁵ and R. Allott<sup>5

1</sup>  School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, U.K.
²  Department of Physics, University of York, York YO1 5DD, U.K.
³  LSAI, Université Paris-Sud, bâtiment 350, 91405 Orsay, France
⁴  Max Born Institut, Rudower Chaussee 6, 12489 Berlin, Germany
⁵  Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, U.K.

Abstract
Saturated output has been observed for both Ne and Ni-like X-ray lasers when pumped in the transient mode. As these 'normal' transitions display very high gain, attempts have been made to observe a [MATH] inner shell transition in Ne-like ions, which scale well towards the water window. Modelling of the pump conditions for Ge lasing at 6.2 nm is presented. As the predicted gain is low the experiment was set up for 18 mm targets. Shots were taken on Ti, Fe, Ni and Ge. A [MATH] travelling wave pulse is applied at various times after the peak of a long, preforming pulse. Various pump conditions were attempted but no inner shell X-ray laser was detected.

© EDP Sciences 2001