Verification of gyrokinetic δf simulations of electron temperature gradient turbulence

The GEM gyrokinetic δf simulation code [Y. Chen and S. Parker, J. Comput. Phys. 189, 463 (2003); Y. Chen and S. Parker, J. Comput. Phys.220, 839 (2007)] is shown to reproduce electron temperature gradient turbulence at the benchmark operating point established in previous work [W. M. Nevins, J. Candy, S. Cowley, T. Dannert, A. Dimits, W. Dorland, C. Estrada-Mila, G. W. Hammett, F. Jenko, M. J. Pueschel, and D. E. Shumaker, Phys. Plasmas 13, 122306 (2006)]. The electron thermal transport is within 10% of the expected value, while the turbulent fluctuation spectrum is shown to have the expected intensity and two-point correlation function.