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- W135338220 abstract "Dimensionally similar scaling is a technique to scale existing tokamak discharges to larger size, a, or larger magnetic field, B, by fixing dimensionless parameters such as the plasma {beta} and collisionality as well as safety factor q, elongation, and aspect ratio while varying the normalized gyroradius {rho}{sub *} = {rho}/{alpha}. Diffusion mechanisms can be classified by their dependence on {rho}{sub *}. The confinement time scales as {tau} {proportional to} {Omega}{sup {minus}1} {rho}{sub *}{sup {minus}3} {proportional to} Ba{sup 5/2} or gyroBohm-like mechanisms or {tau} {proportional to} {Omega}{sup {minus}1} {rho}{sub *}{sup {minus}2} {proportional to} B{sup 1/3}a{sup 5/3} for Bohm-like mechanisms. Establishing that either mechanism dominates transport allows one to predict performance for next generation devices with reasonable confidence without knowledge of the complex and likely coupled transport mechanisms governing confinement. Statistical studies of global confinement time have consistently shown that the standard L-mode scaling is close to or worse than Bohm-like whereas the majority of theories suggest a gyroBohm-like local diffusion process. During the past year experiments to resolve this difference were performed on DIII-D and subsequently on TFTR. The are results discussed in this paper." @default.
- W135338220 created "2016-06-24" @default.
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- W135338220 date "1991-04-01" @default.
- W135338220 modified "2023-09-27" @default.
- W135338220 title "Comparison of dimensionally similar discharges with similar heat deposition discharges" @default.
- W135338220 hasPublicationYear "1991" @default.
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