AI Article Synopsis
- The study investigates how solids ablate (break apart) when exposed to extremely high-intensity laser light, which had not been deeply studied before.
- Researchers measured the velocity of ions (charged particles) as the ablation process started, using advanced imaging techniques to capture data from different angles.
- Analysis suggests that the ions are either mostly still or moving outward at a specific speed, indicating that a particular type of electrostatic potential plays a significant role in the solid's breakdown.
Article Abstract
Solids ablate under laser irradiation, but experiments have not previously characterized the initiation of this process at ultrarelativistic laser intensities. We present first measurements of bulk ion velocity distributions as ablation begins, captured as a function of depth via Doppler-shifted x-ray line emission from two viewing angles. Bayesian analysis indicates that bulk ions are either nearly stationary or flowing outward at the plasma sound speed. The measurements quantitatively constrain the laser-plasma ablation mechanism, suggesting that a steplike electrostatic potential structure drives solid disassembly.
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| http://dx.doi.org/10.1103/PhysRevLett.129.235001 | DOI Listing |
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