Driven-Turbulence Simulations of High-Energy-Density Plasmas
POSTER
Abstract
The magnitude of magnetic fields in the observable universe leads to questions regarding the physical processes that can grow and maintain them. One leading theory is fluctuation dynamo, which can amplify seed magnetic fields in a turbulent plasma to the point where the magnetic energy becomes an appreciable fraction of the available turbulent kinetic energy. Since the seminal numerical demonstration of fluctuation dynamo by Meneguzzi et al.,1 several numerical studies have pushed simulations codes and leveraged high-performance computing resources to explore fluctuation dynamo in magnetized turbulence at different regimes (for a recent review see Rincon2), although limited in the resistive magnetohydrodynamics (MHD) ansatz. Inspired by the recent experimental demonstrations of fluctuation dynamo by the turbulent dynamo (TDYNO)collaboration3,4 via laser-driven, high-energy-density (HED) experiments at the Omega Laser Facility at the University of Rochester's Laboratory for Laser Energetics, we present a series of 3-D FLASH simulations of driven turbulence that aim to study HED turbulence in regimes where plasma physics processes are important and extend beyond the one-temperature resistive-MHD ansatz broadly employed in existing theoretical and numerical models. The effort leverages FLASH's new extended MHD and HED physics capabilities and will furnish the theoretical foundations for future TDYNO experiments.
*This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856. The Flash Center acknowledges support by the U.S. DOE NNSA under Awards DE-NA0002724, DE-NA0003605, DE-NA0003842, DE-NA0003934, and Subcontracts 536203 and 630138 with LANL and B632670 with LLNL; the NSF under Award PHY-2033925; the U.S. DOE Office of Science Fusion Energy Sciences, under Award DE-SC0021990; and the U.S. DOE ARPA-E under Award DE-AR0001272.
Publication:1 M. Meneguzzi, U. Frisch, and A. Pouquet, Phys. Rev. Lett. 47, 1060 (1981). 2 F. Ricon, J. Plasma Phys. 85, 205850401 (2019). 3 P. Tzeferacos et al., Nat. Commun. 9, 591 (2018). 4 A. F. A. Bott et al., Proc. Natl. Acad. Sci. 118, e2015729118 (2021).
