National Academy of Engineering
![Picture of James D. Callen](/sites/default/files/styles/award_image/public/2019-07/james_d._callen.gif?h=2789d800&itok=ZKoB3rN4)
James D. Callen
"For pioneering work in the development of models of neutral beam heating, tokamak discharge macroscopics, and anomalous (turbulent) transport in plasmas."