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Nonlinear energy transfer and dissipation in Alfv\'en wave turbulence areanalyzed in the first gyrokinetic simulation spanning all scales from the tailof the MHD range to the electron gyroradius scale. For typical solar windparameters at 1 AU, about 30% of the nonlinear energy transfer close to theelectron gyroradius scale is mediated by modes in the tail of the MHD cascade.Collisional dissipation occurs across the entire kinetic range$k_\perp\rho_i\gtrsim 1$. Both mechanisms thus act on multiple coupled scales,which have to be retained for a comprehensive picture of the dissipation rangein Alfv\'enic turbulence.

Multiscale nature of the dissipation range in gyrokinetic simulations of Alfv\'enic turbulence