Temporal behavior of x-ray radiation emitted by subpicosecond KrF-laser-heated carbon preplasmas

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Abstract
The soft x-ray radiation intensity (λ∈[5 Å, 45 Å]) emitted by a carbon plasma after the interaction of a short ultrahigh-intensity KrF laser pulse with preplasmas of different scale lengths was investigated. This was done spectrally and temporally resolved by means of a time-resolving spectrograph. A strong increase in the duration of this radiation with larger scale lengths is observed, which is qualitatively explained by a shift of the heat deposition to smaller densities.

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