MIT plasma turbulence experimentalist and department head advancing the science of energy transport in tokamaks
Anne White is an American plasma physicist, professor at the Massachusetts Institute of Technology, and head of MIT’s Department of Nuclear Science and Engineering. Her research on turbulence and energy transport in tokamak plasmas has produced some of the most detailed experimental measurements of the fluctuations that govern how energy escapes from magnetically confined plasmas—a question that sits at the heart of whether fusion reactors can achieve the confinement needed for net energy production.
Energy transport in tokamaks is dominated not by classical particle collisions but by turbulent fluctuations in the plasma’s density, temperature, and electric field. These fluctuations drive heat and particles across magnetic field lines far faster than collisional theory predicts, and understanding them is essential to predicting reactor performance. White’s experimental program has focused on making precise, spatially resolved measurements of these fluctuations using advanced diagnostics such as correlation electron cyclotron emission (CECE) radiometry and phase-contrast imaging.1
Her work has been particularly important in testing the predictions of gyrokinetic simulation codes—the computational workhorses that the fusion community relies on to model turbulent transport. By comparing measured fluctuation spectra, correlation lengths, and transport levels against code predictions, White and her collaborators have identified both the successes and the failures of existing models, driving improvements in simulation fidelity.2
Working primarily on the Alcator C-Mod tokamak at MIT and later through collaborations on DIII-D and other devices, White has made several influential contributions. Her measurements of electron-scale turbulence helped resolve longstanding discrepancies between predicted and observed electron thermal transport. She has also investigated the role of turbulence suppression in the formation of internal transport barriers—regions of reduced transport that dramatically improve plasma confinement and are considered essential for advanced tokamak operation.3
As head of MIT’s Department of Nuclear Science and Engineering, White leads one of the premier academic programs in the field at a time of extraordinary activity in fusion energy. MIT’s partnership with Commonwealth Fusion Systems (CFS) on the SPARC tokamak has placed the university at the center of the high-field, compact tokamak approach, and White’s department has been instrumental in training the scientists and engineers who staff both the academic and private-sector sides of that effort.4
Her leadership role extends beyond MIT. White has served on advisory committees for the U.S. Department of Energy’s fusion program, contributed to community planning exercises, and advocated for maintaining strong university-based fusion research programs alongside the growing private sector. She has emphasized that the turbulence and transport physics her group studies is not merely academic—it directly determines the size, cost, and feasibility of any future fusion reactor, and getting the predictions right before committing billions to construction is one of the most consequential tasks in the field.5
White’s career represents the essential role of precision experimental physics in a field often dominated by large engineering projects. Her insistence on quantitative validation of theoretical models has raised the standard of evidence in transport physics and contributed to a culture of rigorous benchmarking that will be critical as fusion moves from laboratory experiments to power-plant design.