1. The importance of temperature-dependent collision frequency in PIC simulation on nanometric density evolution of highly-collisional strongly-coupled dense plasmas
- Author
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Banjafar, Mohammadreza, Randolph, Lisa, Huang, Lingen, Rahul, S. V., Preston, Thomas R., Yabuuchi, Toshinori, Makita, Mikako, Dover, Nicholas P., Göde, Sebastian, Kon, Akira, Koga, James K., Nishiuchi, Mamiko, Paulus, Michael, Rödel, Christian, Bussmann, Michael, Cowan, Thomas E., Gutt, Christian, Mancuso, Adrian P., Kluge, Thomas, and Nakatsutsumi, Motoaki
- Subjects
Physics - Plasma Physics - Abstract
Particle-in-Cell (PIC) method is a powerful plasma simulation tool for investigating high-intensity femtosecond laser-matter interaction. However, its simulation capability at high-density plasmas around the Fermi temperature is considered to be inadequate due, among others, to the necessity of implementing atomic-scale collisions. Here, we performed a one-dimensional with three-velocity space (1D3V) PIC simulation that features the realistic collision frequency around the Fermi temperature and atomic-scale cell size. The results are compared with state-of-the-art experimental results as well as with hydrodynamic simulation. We found that the PIC simulation is capable of simulating the nanoscale dynamics of solid-density plasmas around the Fermi temperature up to $\sim$2~ps driven by a laser pulse at the moderate intensity of $10^{14-15}$~$\mathrm{W/cm^{2}}$, by comparing with the state-of-the-art experimental results. The reliability of the simulation can be further improved in the future by implementing multi-dimensional kinetics and radiation transport.
- Published
- 2024