High-Density Plasmas Produced by Ultrafast Laser Pulses
- 9 January 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 62 (2) , 155-158
- https://doi.org/10.1103/physrevlett.62.155
Abstract
We describe temporal and spectroscopic measurements of high-density plasmas produced by focusing intense, 160-fsec laser pulses on solids. Soft-x-ray emission with a duration of 2±2 psec is observed up to photon energies of a kilovolt. We observe reduced emission from long-lived spectral lines, indicating the presence of a short-lived, high-density plasma. Reflectivity measurements indicate that absorption of the laser pulse occurs at the surface of the solid before it expands.Keywords
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