Exploding Plasma, Two Fluid MHD

Two fluid MHD simulation of expanding plasma. The plasma is heated to around 1 keV. The simulation shows the electrons on left and hydrogen ions on the right. Due to the electrons smaller mass they are quickly blown off the plasma. This seems to create lower-hybrid drift instabilities (LMDI) but I am not sure. This process also results in an electromagnetic pulse due to the charge separation.

[@TheBigBumpinPartyPad]

Does the electron density follow exp(voltage / kT)? Is there an electron temperature profile? What was the initial plasma radius in Debye lengths?