7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-35-Pr2-38
DOI: 10.1051/jp4:2001205

Characterization of a transient Ni-like Ag X-ray laser under two-color irradiation

J. Kuba¹, A. Klisnick², D. Ros², G. Jamelot², P. Fourcade², J.-L. Miquel³, S. Jacquemot³, N. Blanchot⁴ and J.-F. Wyart<sup>5

1</sup>  Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 11519 Prague 1, Czech Republic
²  Laboratoire de Spectroscopie Atomique et Ionique, Université Paris-Sud, bâtiment 350, 91405 Orsay cedex, France
³  CEA/DIF, BP. 12, 91680 Bruyères-le-Chatel, France
⁴  CEA/CESTA/DLP, BP. 2, 33114 LeBarp, France
⁵  Laboratoire Aimé Cotton, bâtiment 505, 91405 Orsay cedex, France

Abstract
By frequency-doubling the long pre-forming pulse in the now well-known transient collisional excitation (TCE) scheme, a two-color ([MATH]) pumping of the nickel-like silver x-ray laser (XRL) has been investigated both experimentally and theoretically. The angular XRL characteristics have been studied and compared to standard ([MATH]) and inverse 2-color ([MATH]) irradiations. Through a statistical treatment of the recorded data, a significant reduction of the beam divergence has then been noticed. Moreover, the influence of the required traveling wave irradiation on the amplification duration has been checked, the observed shortening being explained by either a simple propagation model or more sophisticated simulations.

© EDP Sciences 2001