# Application of plasma physics constraints to confinement data

@article{Christiansen1991ApplicationOP, title={Application of plasma physics constraints to confinement data}, author={J. P. Christiansen and J. G. Cordey and O. Kardaun and Knud Thomsen}, journal={Nuclear Fusion}, year={1991}, volume={31}, pages={2117 - 2129} }

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 tests. A new result obtained is that the fundamental constraint imposed by the high-β collisional Fokker-Planck equation (Kadomtsev) is satisfied by the data. An additional constraint on the characteristic scale length associated with thermal diffusion can also be satisfied by the data…

## 25 Citations

H-mode power threshold and confinement in JET H, D, D-T and T plasmas

- Physics
- 1999

The scaling of both the L-H threshold and confinement with the mass M of hydrogenic isotopes is discussed. The confinement was found to scale differently with M in the core and the edge, and a two…

Dimensionality correct power law scaling expressions for L-mode confinement

- Physics, Computer Science
- 1991

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 a scaling similar to the Goldston scaling is found for the neutral beam limiter dataset.

The scaling of transport with normalized Larmor radius in JET

- Physics
- 1993

From the first principles of plasma physics, the local thermal diffusivity can be expressed in terms of the Bohm diffusivity χB and a function, F, of dimensionless parameters. Tests of transport…

Dimensionally constrained energy confinement analysis of W7-AS data

- Physics
- 1998

A recently assembled W7-AS stellarator database has been subject to dimensionally constrained confinement analysis and Bayesian theory allows the calculation of the probability for each model and it is found that the present data are most probably described by the collisionless high-β case.

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,…

The updated ITPA global H-mode confinement database: description and analysis

- PhysicsNuclear Fusion
- 2021

The multi-machine International Tokamak Physics Activity (ITPA) Global H-mode Confinement Database has been upgraded with new data from JET with the ITER-like wall and ASDEX Upgrade with the full…

Chapter 2: Plasma confinement and transport

- Physics
- 2007

The understanding and predictive capability of transport physics and plasma confinement is reviewed from the perspective of achieving reactor-scale burning plasmas in the ITER tokamak, for both core…

Dimensionally exact form-free energy confinement scaling in W7-AS

- Physics
- 1999

A semi-empirical theory for global energy confinement in the stellarator W7-AS is presented. It employs elementary rules of probability theory together with the transformation properties of the basic…

Fusion performance with thermal confinement scalings

- Physics, Engineering
- 1994

Energy confinement scalings for the thermal component of the plasma published thus far have a different dependence on plasma density and input power than do most scalings for the total plasma energy.…

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.

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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,…

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