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Physics of Plasmas
The physics underlying the Non-Zonal Transition [M.J. Pueschel et al., Phys. Rev. Lett. 110, 155005 (2013)] are explored in detail, and various studies are presented which support the theory that critically weakened zonal flows are indeed responsible for the failure of ion-temperaturegradient-driven turbulence at high plasma β to saturate at typical transport values. Regarding flux-surface-breaking magnetic fluctuations and their impact on zonal flows, numerical approaches to obtaining zonaldoi:10.1063/1.4823717 fatcat:6snqqq4dzvhtbkogzc2d76cmvq