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The interaction of two lasers with a difference frequency near that of theambient plasma frequency produces beat waves that can resonantly acceleratethermal electrons. These beat waves can be used to drive electron current andthereby embed magnetic fields into the plasma [D. R. Welch et al., Phys. Rev.Lett. 109, 225002 (2012)]. In this paper, we present two-dimensionalparticle-in-cell simulations of the beat-wave current-drive process over a widerange of angles between the injected lasers, laser intensities, and plasmadensities. We discuss the application of this technique to the magnetization ofdense plasmas, motivated in particular by the problem of forming high-betaplasma targets in a standoff manner for magneto-inertial fusion. Thefeasibility of a near-term experiment embedding magnetic fields using laserswith micron-scale wavelengths into a $\sim 10^{18}$-cm$^{-3}$-density plasma isassessed.

Particle-in-cell simulations of laser beat-wave magnetization of dense plasmas