期刊
PHYSICAL REVIEW LETTERS
卷 129, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.129.235001
关键词
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资金
- DOE Office of Science, Fusion Energy Sciences under Contract: the LaserNetUS initiative at Colorado State University's Advanced Beam Laboratory [DE-SC0021246]
- U.S. Department of Energy by Princeton Plasma Physics Laboratory [DE-AC02-09CH11466]
- Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- DoD Vannevar Bush Faculty Fellowship ONR Award [N000142012842]
- U.S. Department of Defense (DOD) [N000142012842] Funding Source: U.S. Department of Defense (DOD)
- U.S. Department of Energy (DOE) [DE-SC0021246] Funding Source: U.S. Department of Energy (DOE)
This study presents the first measurements of bulk ion velocity distributions during the initiation of solid ablation under ultrarelativistic laser intensities. Bayesian analysis reveals that bulk ions are either stationary or flowing outward at the plasma sound speed. The results quantitatively constrain the laser-plasma ablation mechanism, suggesting that a steplike electrostatic potential structure drives solid disassembly.
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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