Dr. Hahm is a principal research physicist and a distinguished laboratory fellow. He is an elected fellow of the American Physical Society since 1995. He was the recipient of the Kaul Prize for Excellence in Plasma Physics and Technology Development in 2005. He is the first author of over 37 papers published in refereed journals. Hahm graduated with a B.S. in Physics from Seoul National University in Korea (1980). He then went on to receive an M.A. in Astrophysical Sciences (1982) and a Ph.D. in Astrophysical Sciences (1984) from Princeton University. His research interests include the development of reduced nonlinear kinetic equations in general geometry and applications to gyrokinetic simulations; the ExB flow shear suppression theory of turbulence in magnetically confined plasmas; the dynamics of turbulence driven zonal flows; and momentum transport in tokamaks.

His frequently cited publications include:

"Flow Shear Induced Flunctuation Suppression in Finite Aspect Ratio Shaped Tokamak Plasmas," T.S. Hahm and K.H. Burrell, Phys. Plasmas 2, 1648 (1995).

"Shearing Rate of Time-dependent ExB Flow," T.S. Hahm et al., Phys. Plasmas 6, 922 (1999).

"Nonlinear Gyrokinetic Equations for Tokamaks Microturbulence," T. S. Hahm, Phys. Fluids, 31, 2670 (1988).

"Forced Magnetic Reconnection," T. S. Hahm and R. M. Kulsrud, Phys. Fluids 28, 2412 (1985).

"Turbulent Transport Reduction by Zonal Flows: Massively Parrellel Simulations," Z.Lin, T.S. Hahm, W.W.Lee et al.,Science 2811835 (1998).

"On the Dynamics of Turbulent Transport near Marginal Stability," P.H. Diamond and T.S. Hahm, Phys. Plasmas 2, 3640 (1995).