Directional bremsstrahlung from a Ti laser-produced x-ray source at relativistic intensities in the 3-12 keV range.
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.
Zamponi
F
F
Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany. zamponi@mbi-berlin.de
Lübcke
A
A
Kämpfer
T
T
Uschmann
I
I
Förster
E
E
Robinson
A P L
AP
Giulietti
A
A
Köster
P
P
Labate
L
L
Levato
T
T
Gizzi
L A
LA