Observation of critical gradient behavior in Alfven eigenmode
induced fast ion transport
C. S. Collins, W. W. Heidbrink, M. E. Austin, G. E. Kramer,
D. C. Pace, C. C. Petty, l. Stagner, M. A. Van Zeeland, R. B. White,
Y. B. Zhu
Phys. Rev. Lett 116, 095001 (2016)