TY - JOUR
T1 - Time-resolved analysis of the X-ray emission of femtosecond-laser-produced plasmas in the 1.5-keV range
AU - Bastiani-Ceccotti, S.
AU - Audebert, P.
AU - Nagels-Silvert, V.
AU - Geindre, J. P.
AU - Gauthier, J. C.
AU - Adam, J. C.
AU - Héron, A.
AU - Chenais-Popovics, C.
PY - 2004/1/1
Y1 - 2004/1/1
N2 - Recent experimental results on ion beams produced in high-intensity laser-solid interactions indicate the presence of very intense electric fields in the target. This suggests the possibility of efficiently heating a solid material by means of the fast electrons created during the laser-solid interactions and trapped in the target, rather than by the laser photons themselves. We tested this mechanism by irradiating very small cubic aluminum targets with the LULI 100-TW, 300-fs laser at 1.06-μm wavelength. X-ray spectra were measured with an ultra-fast streak camera, coupled to a conical Bragg crystal, providing spectra in the 1.5-keV range with high temporal and spectral resolution. The results indicate the creation of a hot plasma, but a very low coupling between the rapid electrons and the solid. A tentative explanation, in agreement with other experimental results and with preliminary particle-in-cell (PIC) simulations, points out the fatal role of the laser prepulse.
AB - Recent experimental results on ion beams produced in high-intensity laser-solid interactions indicate the presence of very intense electric fields in the target. This suggests the possibility of efficiently heating a solid material by means of the fast electrons created during the laser-solid interactions and trapped in the target, rather than by the laser photons themselves. We tested this mechanism by irradiating very small cubic aluminum targets with the LULI 100-TW, 300-fs laser at 1.06-μm wavelength. X-ray spectra were measured with an ultra-fast streak camera, coupled to a conical Bragg crystal, providing spectra in the 1.5-keV range with high temporal and spectral resolution. The results indicate the creation of a hot plasma, but a very low coupling between the rapid electrons and the solid. A tentative explanation, in agreement with other experimental results and with preliminary particle-in-cell (PIC) simulations, points out the fatal role of the laser prepulse.
U2 - 10.1007/s00340-004-1440-7
DO - 10.1007/s00340-004-1440-7
M3 - Article
AN - SCOPUS:2642585808
SN - 0946-2171
VL - 78
SP - 905
EP - 909
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
IS - 7-8
ER -