Density scaling of disorder-induced heating in ultracold neutral plasmas

We present measurements and simulations of disorder-induced heating (DIH) in the first 100 ns after plasma formation. We study plasmas with peak densities up to $4\times 10^{10}$ cm$^{- 3}$ and initial electron temperatures up to 60 K using laser- induced fluorescence on the plasma ions. Rabi oscillations, DIH, and plasma expansion are clearly visible in the fluorescence signals.