Response to "comment on Nonlinear gyrokinetic theory with polarization drift'" [Phys. Plasmas 17, 124701 (2010)]

Abstract

We agree that there is no contradiction between Wang and Hahm [Phys. Plasmas 17, 082304 (2010)] and Sosenko [Phys. Scr. 64, 264 (2001)]. However, by explicitly evaluating the change in phase-volume due to the electrostatic potential [T. S. Hahm, Phys. Plasmas 3, 4658 (1996)], Wang and Hahm [Phys. Plasmas 17, 082304 (2010)] has demonstrated that the polarization density remains the same even when the polarization drift explicitly appears in the gyrocenter equations of motion, and has derived an energy invariant in general toroidal geometry. © 2010 American Institute of Physics.