A study of picosecond laser–solid interactions up to 1019 W cm−2
- 1 February 1997
- journal article
- Published by AIP Publishing in Physics of Plasmas
- Vol. 4 (2), 447-457
- https://doi.org/10.1063/1.872103
Abstract
The interaction of a 1053 nm picosecond laser pulse with a solid target has been studied for focused intensities of up to 1019 W cm−2. The maximum ion energy cutoff Emax (which is related to the hot electron temperature) is in the range 1.0–12.0 MeV and is shown to scale as Emax≈I1/3. The hot electron temperatures were in the range 70–400 keV for intensities up to 5×1018 W cm−2 with an indication of a high absorption of laser energy. Measurements of x-ray/γ-ray bremsstrahlung emission suggest the existence of at least two electron temperatures. Collimation of the plasma flow has been observed by optical probing techniques.Keywords
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