Observations of high beta kinetic turbulence in Biermann-battery driven magnetized shocks in experiments at OMEGA*

Magnetic turbulence plays an important role in collisionless shocks. It is essential for diffusive shock acceleration while also providing a way for shock energy dissipation. In this presentation, proton radiography data from a Biermann-battery driven magnetized collisionless shock experiments are analyzed for magnetic turbulence. The resulting magnetic power spectrum has a shallow slope at large scales and a steeper slope at small scales with a spectral brake between the ion-Larmor radius and the ion skin depth. The system is high beta with the kinetic ion beta at around 20. Particle-in-cell simulations with similar conditions to the experiment are performed to study high-beta kinetic turbulence. The resulting simulated magnetic power spectrum is similar to the experimental spectrum showing that the experimental measurements are consistent with magnetic turbulence.