Scaling arguments for a plasma experiment relevant to an interplanetary coronal mass ejection

Abstract

We present the design of a plasma experiment scaled to be relevant to an interplanetary coronal mass ejection (ICME) traveling from the Sun to the Earth. The experiment would launch a compact torus of plasma (the scaled analog of the coronal mass ejected by the Sun) into a magnetized background plasma (the scaled analog of the interplanetary medium, the diffuse magnetized plasma that fills the Solar System). We present the complete process of scaling the ICME system to a laboratory experiment: beginning with the ICME features that we aim to replicate with a laboratory experiment, explaining how these desired features are translated into specific design constraints, and presenting a set of experimental parameters that meet those constraints. We find that the experiment would be possible with plasma conditions typically achieved in large-scale facilities such as the Big Red Ball at the University of Wisconsin or the LArge Plasma Device at the University of California, Los Angeles.

Creating and studying a scaled interplanetary coronal mass ejection

“…Young and Kuranz provide a more detailed scaling argument. 8 Here, we consider the magnetosonic Mach number, plasma b, and key pressure ratios in the system. Table II displays a comparison of a typical ICME event's dimensionless numbers to that from our experiment.…”