研究目的
Investigating the ion–ion acoustic instability in laser-produced astrophysically relevant plasma and its association with collisionless shocks.
研究成果
The experiment provided evidence of ion–ion acoustic instability in laser-produced plasma, supporting the speculation of such instabilities in supernova remnants. The results demonstrate the potential of laser-matter interactions for exploring micro-instabilities of collisionless shocks in an astrophysical context.
研究不足
The experiment was limited by the laser's energy and the spatial and temporal resolution of the proton radiography technique.
1：Experimental Design and Method Selection:
The experiment involved irradiating a copper foil with a short (2 ps) intense (1017 W cm?2) laser pulse to generate dense hot plasma. The expansion of this plasma into the rare?ed preplasma generated an electrostatic collisionless shock. Proton radiography was used to monitor the shock oscillation electric ?eld and the instability ?lamentary modulation.
2：Sample Selection and Data Sources:
A copper foil was used as the target. The preplasma was formed by ASE ablation of the foil surface.
3：List of Experimental Equipment and Materials:
The XingGuang III laser facility was used for the experiment. A second laser beam was used to produce high-energy proton beams for diagnostics.
4：Experimental Procedures and Operational Workflow:
The laser pulse was focused on the copper foil, and the resulting plasma expansion was monitored using proton radiography.
5：Data Analysis Methods:
The data was analyzed using particle-in-cell and particle-tracing simulations to reproduce the experimental observations.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
