Expansion-induced Doppler shifts from ultrashort-pulse laser-produced plasmas
H. M. MilchbergInstitute for Physical Science and Technology and Department of Electrical Engineering, University of Maryland, College Park, Maryland 20742R. R. FreemanInstitute for Physical Science and Technology and Department of Electrical Engineering, University of Maryland, College Park, Maryland 20742
1990en
ABI
Annotatsiya
The expansion of hot, near-solid-density plasmas produced by subpicosecond laser pulses has been measured by monitoring the spectral modifications imposed on the specularly reflected heating pulse. The spectral changes are attributable to Doppler shifts arising from mass motion driven by the heated electrons; a simple model for the expansion is used to estimate electron temperatures in the range 1--100 eV, corresponding to incident laser intensities ${10}^{12}$--${10}^{15}$ W/${\mathrm{cm}}^{2}$. .AE
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