# Random Coefficient H-mode Confinement Scalings

@article{Riedel1992RandomCH,
title={Random Coefficient H-mode Confinement Scalings},
author={Kurt S. Riedel},
journal={arXiv: Plasma Physics},
year={1992}
}
• K. Riedel
• Published 1 July 1992
• Physics, Computer Science
• arXiv: Plasma Physics
The random coefficient two-stage regression algorithm with the collisional Maxwell-Vlasov constraint is applied to the ITER H-mode confinement database. The data violate the collisional Maxwell-Vlasov constraint at the 10-30% significance level, probably owing to radiation losses. The dimensionally constrained scaling, $\tau_E = 0.07192 M^{1/2}$ $(R/a)^{-0.221} R^{1.568} \kappa^{.3} I_p^{.904} B_t^{.201} \bar{n}^{0.106} P^{-0.493}$, is similar to ITER89P with a slightly stronger size dependence…
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## References

SHOWING 1-7 OF 7 REFERENCES
Dimensionally Correct Power Law Scaling Expressions for L-mode Confinement
The random coefficient two stage regression algorithm is applied to a neutral beam heated limiter subset of the ITER L mode database as well as a combined dataset and finds a scaling similar to Goldston scaling for the NB limiter dataset and a scaled similar to ITER89P for the combined dataset.
Application of plasma physics constraints to confinement data
• Physics
• 1991
A subset of the ITER L-mode and H-mode confinement data is tested against the constraints imposed by various theoretical models for thermal plasma transport. Matrix algebra is used to facilitate such
Uncertainties associated with extrapolating L mode energy confinement to ITER and CIT
• Physics
• 1990
The authors apply a two-step tokamak regression procedure to L-mode confinement data. The resulting scaling expression for ?E: is similar to other published scaling expressions. Using the random
SPECIAL TOPIC: Global energy confinement H-mode database for ITER
• Physics
• 1992
Describes the content of an H-mode confinement database that has been assembled for the ITER project. Data were collected from six machines of different sizes and shapes: ASDEX, DIII-D, JET, JFT-2M,
Tokamak to tokamak variation and collinearity in scaling laws
The large multiplicity of scaling laws which almost fit the data is associated with the near degeneracy of the data covariance matrix. The traditional analysis assumes that only discharge to
Performance Projections for B.P.X.
• Bull. of Am. Phys. Soc.,
• 1920
A Global Energy Confinement H - mode Database for I . T . E . R . ” , to be submitted to Nucl
• 1990