2015 Nuclear Fusion Prize acceptance speech

[摘要] It is a great pleasure to receive the 2015 Nuclear Fusion award for my work developing aheuristic drift-based model for the power scrape-off width in tokamaks. I was particularlypleased to receive the award from IAEA Director General Yukiya Amano, whose thoughtfulleadership has advanced the cause of nuclear non-proliferation mightily.When I returned to research in 2009, after serving as director of the Princeton PlasmaPhysics Laboratory for 12 years, I decided to focus my efforts on the plasma edge. My earlywork had been on plasma heating, including classical effects and α-particle confinementin the presence of ripple, as well as discovering that the fishbone instability was driven bytrapped beam ions precessing around the torus. Next, I followed the injected energy intothe plasma and studied the confinement of thermal energy in tokamak plasmas, finding anempirical scaling that indicated that nTτ, which measures the maximum attainable Pα/Ploss,scales as (IpA)2, a result that seems to have held up well over the years.