# Dimensionally Correct Power Law Scaling Expressions for L-mode Confinement

@article{Riedel1991DimensionallyCP, title={Dimensionally Correct Power Law Scaling Expressions for L-mode Confinement}, author={Kurt S. Riedel}, journal={arXiv: Plasma Physics}, year={1991}, pages={927-941} }

Confinement scalings of divertor and radiofrequency heated discharges are shown to differ significantly from the standard neutral beam heated limiter scaling. 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. We find a scaling similar to Goldston scaling for the NB limiter dataset and a scaling similar to ITER89P for the combined dataset. Various missing value algorithms are…

## 12 Citations

Random Coefficient H-mode Confinement Scalings

- Physics, Computer Science
- 1992

The random coefficient two-stage regression algorithm with the collisional Maxwell-Vlasov constraint is applied to the ITER H-mode confinement database, and the data violate the collisionals at the 10-30% significance level, probably owing to radiation losses.

Influence of the divertor on the L mode confinement in ASDEX

- Physics
- 1995

Results of confinement studies on an L mode database covering 10 years of operation of ASDEX are presented. During this time, the ASDEX divertor was modified several times. Scaling expressions for…

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…

Development of Density and Temperature Boundary Condition Models in L-mode Tokamak Plasmas

- Physics
- 2010

Models for predicting temperature and density at the edge of Low Confinement mode (L-mode) plasmas are developed. It is assumed in this work that the temperature and density at boundary of L-mode…

Simulations of current density profile control using lower hybrid current drive in the TdeV Tokamak

- Physics
- 1995

The physics basis of a simulation model for lower hybrid current drive (LHCD) is discussed. Issues associated with LH power deposition-wave propagation, mode conversion and cut-offs in toroidal…

III. CONFINEMENT

- Physics
- 2002

The problem of projecting the energy confinement properties of future devices is a long-standing one in toroidal confinement research. While substantial progress has been made in characterizing the…

Profile shape parameterization of jet electron temperature and density profiles

- Physics
- 1997

The temperature and density profiles of the Joint European Torus (JET) are parametrized using log additive models in the control variables. Predictive error criteria are used to determine which terms…

Ion temperature profile simulation of JT-60 and TFTR plasmas with ion temperature gradient mode transport models

- Physics
- 1994

Ion temperature profiles of neutral beam heated plasmas in JT-60 and TFTR have been simulated using models of ion thermal diffusivity, χi, based on ion temperature gradient mode (ηi mode) turbulence…

Tokamak transport based on the 13-moment model

- Physics
- 1995

A new model for collisional transport in a tokamak plasma is analysed. This model is obtained from Grad's 2-fluid 13-moment equations by estimating the order of magnitude of the various effects and…

The testing of transport models against data

- Physics
- 1994

Many different models for energy transport in a tokamak have been tested against subsets of the wealth of data accumulated from tokamak experiments and claimed to describe adequately the data used in…

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