AI Article Synopsis
- The study measured how electron density and temperature change in a laser-produced plasma using collective Thomson scattering with high time resolution.
- This research dived into the dynamics of plasma waves, showing a shift from a cold, collisional state to a more stable, collisionless state.
- When comparing experimental data to theoretical models, it was found that the BGK model inaccurately predicted the electron temperature, overstating it by 50% during highly collisional situations.
Article Abstract
The rapid evolutions of the electron density and temperature in a laser-produced plasma were measured using collective Thomson scattering. Unprecedented picosecond time resolution, enabled by a pulse-front-tilt compensated spectrometer, revealed a transition in the plasma-wave dynamics from an initially cold, collisional state to a quasistationary, collisionless state. The Thomson-scattering spectra were compared with theoretical calculations of the fluctuation spectrum using either a conventional Bhatnagar-Gross-Krook (BGK) collision operator or the rigorous Landau collision terms: the BGK model overestimates the electron temperature by 50% in the most-collisional conditions.
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| http://dx.doi.org/10.1103/PhysRevLett.122.155001 | DOI Listing |
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