Physics
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11j3042q&link_type=abstract
New Journal of Physics, Volume 11, Issue 10, pp. 103042 (2009).
Physics
4
Scientific paper
A scheme to obtain brilliant x-ray sources by coherent reflection of a counter-propagating pulse from laser-driven dense electron sheets is theoretically and numerically investigated in a self-consistent manner. A radiation pressure acceleration model for the dynamics of the electron sheets blown out from laser-irradiated ultrathin foils is developed and verified by PIC simulations. The first multidimensional and integral demonstration of the scheme by 2D PIC simulations is presented. It is found that the reflected pulse undergoes Doppler-upshift by a factor 4γz2, where γz=(1- vz2/c2)-1/2 is the effective Lorentz factor of the electron sheet along its normal direction. Meanwhile the pulse electric field is intensified by a factor depending on the electron density of the sheet in its moving frame ne/γ, where γ is the full Lorentz factor.
Borghesi Marco
Dromey B.
Geissler Michael
Qiao Bi
Zepf M.
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