| Issue |
J. Phys. IV France
Volume 133, June 2006
|
|
|---|---|---|
| Page(s) | 473 - 477 | |
| DOI | https://doi.org/10.1051/jp4:2006133097 | |
| Published online | 16 June 2006 | |
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 473-477
DOI: 10.1051/jp4:2006133097
Development of a collimated keV X-ray beam for probing of dense plasmas
R. Shah1, K. Taphuoc1, F. Albert1, A. Rousse1, F. Burgy1, B. Mercier1, J.-P. Rousseau1, A. Pukhov2 and S. Kiselev21 Laboratoire d'Optique Appliquée, ENSTA, CNRS UMR 7639, École Polytechnique, Chemin de la Hunière, 91761 Palaiseau, France
2 Institut fur Theoretische Physik I, Heinrich-Heine-Universitat, Duesseldorf, 40225 Dusseldorf, Germany
Abstract
Experimental findings of a fully optical, keV x-ray source of
1-2
divergence and broadband spectrum (>5 keV
bandwidth) are presented. The radiation results from the highly
relativistic interaction of a 30 TW(1 J, 30 fs) laser pulse thru
a 3 mm length span of He gas (
electrons/cm3). Quantitative measurements from the filtered
back-illuminated CCD give 105 photons/eV, and the knife-edge
technique measures the source diameter of 10 
m. These source
characteristics, the measured beam of relativistic electrons, and
PIC simulation indicate the radiation results from forceful
transverse oscillations of the laser-accelerated electrons in
response to the ionic channel formed by the laser pulse. The source
brightness (107 photons/eV/mm2/mr2/shot and
ultrafast duration (
30 fs) make it applicable to both
backlighting and x-ray science applications.
© EDP Sciences 2006