Theory of K(alpha) generation by femtosecond laser-produced hot electrons in thin foils.
An analytical model of femtosecond K(alpha) x-ray generation from laser-irradiated foils is presented. Expressions are found for the photon emission yield in both forward and backward directions in integral form as a function of hot-electron temperature and target thickness. It is found that for any given target material, there is a foil thickness and a hot-electron temperature at which the K(alpha) emission is maximized. Conversion efficiencies are consistent with contemporary measurements of K(alpha) radiation produced with femtosecond lasers.
Salzmann
D
D
Abteilung Röntgenoptik, Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, D-07743 Jena, Germany.
Reich
Ch
Ch
Uschmann
I
I
Förster
E
E
Gibbon
P
P