Charge transfer pumping for XUV lasers using femtosecond laser induced plasmas interacting with neutrals from a pulsed gas jet [Elektronische Ressource] / von Valeriy Vorontsov

Charge transfer pumping for XUV lasers using femtosecond laser induced plasmas interacting with neutrals from a pulsed gas jet Vom Fachbereich Physik der Universität Hannover zur Erlangung des Grades Doktor der Naturwissenschaften Dr. rer. nat. genehmigte Dissertation von Dipl.-Phys. Valeriy Vorontsov geboren am 08.11.1975 in Omsk, Rußland 2005 Referent : Prof. Dr. B. Wellegehausen Korreferent: Prof. Dr. B. Chichkov Tag der Promotion: 4. Februar 2005 Abstract Valeriy Vorontsov Charge transfer pumping for XUV lasers using femtosecond laser induced plasmas interacting with neutrals from a pulsed gas jet This dissertation introduces a novel setup for investigations of charge transfer pumping at high densities and desirable geometries, which makes this approach very promising for the realization of lasers in the extreme ultraviolet (XUV) spectral range. The new approach consists of a femtosecond laser produced plasma colliding with a pulsed gas jet. For this scheme, the widths of the plasma and gas fronts are correspondingly steep, allowing effective ion-neutral charge exchange interactions at 16 -3densities of reagents in excess of 10 cm , necessary to achieve inversion densities required for high gain and lasing at XUV transitions.