Intermittent turbulence in Multi-Ion Plasmas in the LAPD

Intermittent turbulence and associated density-enhancement events ("blobs") are observed in the edge of a wide range of magnetic confinement devices. In the edge of tokamak plasmas, convective transport associated with blob propagation can dominate particle transport. Most studies of intermittency and blob transport have been performed in single ion species plasmas even though fusion plasmas will need to be mixed ion (DT). We are carrying out a study of blobs in controlled mixtures of hydrogen and deuterium in the Large Plasma Device (LAPD). We will present data and analysis of the properties of blobs (size, velocity, amplitude, transport) as the D-H mix is varied.