TJ-II:Confinement transitions: Difference between revisions
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Strongly driven fusion-grade plasmas often develop spontaneous (radial) narrow zones with steep gradients. This spontaneous local improvement of confinement is of fundamental importance for the operation of fusion plasmas. In fact, the important [[H-mode]] depends on it. | Strongly driven fusion-grade plasmas often develop spontaneous (radial) narrow zones with steep gradients. This spontaneous local improvement of confinement is of fundamental importance for the operation of fusion plasmas. In fact, the important [[H-mode]] depends on it. | ||
This mechanism may also underlie the formation of [[ | This mechanism may also underlie the formation of [[Internal Transport Barrier|internal transport barriers]]. | ||
While this phenomenon is still not completely understood, much progress has been made in recent years. It is believed that turbulent fluctuations drive sheared or zonal flows via the Reynolds Stress Mechanism. | While this phenomenon is still not completely understood, much progress has been made in recent years. It is believed that turbulent fluctuations drive sheared or zonal flows via the Reynolds Stress Mechanism. | ||