Plasma turbulence and spectroscopy research for magnetic fusion energy

The plasma turbulence and spectroscopy group at U. Wisconsin-Madison (https://turbulence.neep.wisc.edu) carries out diverse activities in diagnostic development, diagnostic operation at large fusion experiments, and data analysis and modeling for turbulence, impurity, and fast ion transport. These activities advance the scientific basis of confinement and transport to sustain a burning plasma. We operate 2D Beam Emission Spectroscopy turbulence diagnostics at DIII-D, NSTX-U, and W7-X, plus spectroscopy systems for high-speed charge-exchange, fast ions, and impurities. Furthermore, we pursue adjacent activities in gyrokinetic and synthetic diagnostic modeling, real-time AI/ML turbulence data analysis, and diagnostic innovation including quantum-enhanced measurements. Here, we describe research elements, recent accomplishments, and upcoming plans including active spectroscopy with non-classical light, real-time inference of pedestal turbulence and instabilities, turbulence velocimetry and energy transfer in diverse toroidal configurations, and turbulence-fast ion interactions.