title: Directional bremsstrahlung from a Ti laser-produced x-ray source at relativistic intensities in the 3-12 keV range.
abstract: Front and rear side x-ray emission from thin titanium foils irradiated by ultraintense laser pulses at intensities up to ≈5 × 10(19)  W/cm2 was measured using a high-resolution imaging system. Significant differences in intensity, dimension, and spectrum between front and rear side emission intensity in the 3-12 keV photon energy range was found even for 5 μm thin Ti foils. Simulations and analysis of space-resolved spectra explain this behavior in terms of directional bremsstrahlung emission from fast electrons generated during the interaction process.
authors.affiliation: Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany. zamponi@mbi-berlin.de
authors.forename: F
authors.initials: F
authors.lastname: Zamponi
authors.forename: A
authors.initials: A
authors.lastname: Lübcke
authors.forename: T
authors.initials: T
authors.lastname: Kämpfer
authors.forename: I
authors.initials: I
authors.lastname: Uschmann
authors.forename: E
authors.initials: E
authors.lastname: Förster
authors.forename: A P L
authors.initials: AP
authors.lastname: Robinson
authors.forename: A
authors.initials: A
authors.lastname: Giulietti
authors.forename: P
authors.initials: P
authors.lastname: Köster
authors.forename: L
authors.initials: L
authors.lastname: Labate
authors.forename: T
authors.initials: T
authors.lastname: Levato
authors.forename: L A
authors.initials: LA
authors.lastname: Gizzi