Dataset from: Impact of the electron density and temperature gradient on drift-wave turbulence in LAPD

In this paper we present an experimental study of edge turbulence in the Large Plasma Device at UCLA. We utilize a scan of discharge power to show experimentally that turbulent density fluctuations decrease with decreasing density gradient, as predicted for resistive drift wave turbulence. We also observe that the introduction of electron temperature gradients leads to a reduction in the amplitude of the density fluctuations. The electron temperature gradient reduces the low frequency fluctuations up to 10 kHz, while at higher frequencies, a π phase shift in the density-potential cross-phase is observed. We find that the potential fluctuations do not follow the same trends and that the basic Boltzmann relationship between potential and density fluctuations is violated. We also discuss the impact of collisionality and parallel flows.