학술논문
The importance of temperature-dependent collision frequency in PIC simulation on nanometric density evolution of highly-collisional strongly-coupled dense plasmas
Document Type
Working Paper
Author
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; Nakatsutsumi, Motoaki
Source
Subject
Language
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.