Research interests
Computational plasma physics.
I am currently working on particle simulation of tokamak turbulence. In the past several years, I worked on energetic particles and
MHD modes interaction in tokamak plasmas. I developed a toroidal MHD eigenvalue code calculating the frequency and mode structure of Alfven eigenmodes in general tokamak geometry.
I also worked on the physics of noniductive current drive in tokamak plasmas. I studied the influence of electronelectron collision model on the rf current drive efficiency. I developed a FokkerPlanck code to simulate the lowerhybrid current drive physics using fully relativistic collision operator.
Some Visualizations
The following figures visualize magnetic field lines on tokamak magnetic surfaces with different values of safety factor q.
Research notes
Publications

Fully Kinetic Simulation of IonTemperatureGradient Instabilities in Tokamaks,
Youjun Hu, Matthew T. Miecnikowski, Yang Chen and Scott E. Parker, Plasma 1, 10 (2018)

Simulation of fastiondriven Alfven eigenmodes on EAST tokamak,
Youjun Hu, Y. Todo,Youbin Pei, Guoqiang Li, Jinping Qian, et al., Phys. Plasmas 23, 022505 (2016)
Erratum_2016311.PDF
 Numerical study of Alfven eigenmodes on EAST tokamak,
Youjun Hu, Guoqiang Li, N. N. Gorelenkov, Huishan Cai, et al., Phys. Plasmas 21, 052510 (2014)
Erratum_2014822.PDF
 Electron shielding current in neutral beam current drive in general tokamak equilibria and arbitrary collisionality regime,
Youjun Hu, Yemin Hu, and Y.R. LinLiu, Phys. Plasmas 19, 034505 (2012)
 Relativistic collision operators for modeling noninductive current drive by waves,
Youjun Hu, Yemin Hu, and Y.R. LinLiu, Phys. Plasmas 18, 022504 (2011).
Erratum_2012719
 Drift kink instability in the current sheet with a kappadistribution,
Youjun Hu, Weihong Yang, Yinhua Chen, et al. Phys. Plasmas 15, 082114 (2008).
 LowerHybrid Drift Instability in Modified Harris Current Sheet,
Hu Youjun, Yang Weihong, Chen Yinhua et al., Plasma Sci. Technol. 10, 416 (2008).
 Resonant absorption via mode conversion in magnetized inhomogeneous plasma,
Hu Youjun, Yang Weihong, Chen Yinhua, Zhang Yu, Chinese Journal of Computational Physics (in Chinese) Vol. 24, No. 3, 330336 (2007)