8 papers · 1 filter
Scalings for Tokamak Energy Confinement
P. Yushmanov, T. Takizuka, K. Riedel +4
On the basis of an analysis of the ITER L-mode energy confinement database, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scali…
Random Coefficient H-mode Confinement Scalings
Kurt S. Riedel
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 collis…
Dimensionally Correct Power Law Scaling Expressions for L-mode Confinement
Kurt S. Riedel
Confinement scalings of divertor and radiofrequency heated discharges are shown to differ significantly from the standard neutral beam heated limiter scaling. The random coefficien…
Quasi-linear Transport in a Sheared Flow Field
Kurt S. Riedel
The evolution of a passive scalar field is considered for a slowly varying stratified medium, which is convected in an incompressible sheared flow with many overlapping static flux…
Spectral Estimation of Plasma Fluctuations II: Nonstationary Analysis of ELM Spectra
Kurt S. Riedel, Alexander Sidorenko, Norton Bretz +1
Several analysis methods for nonstationary fluctuations are described and applied to the edge localized mode (ELM) instabilities of limiter H-mode plasmas. The microwave scattering…
Profile Shape Parameterization of JET Electron Temperature and Density Profiles
Beatrix Schunke, Kaya Imre, Kurt S. Riedel
The temperature and density profiles of the Joint European Torus are parameterized using log-additive models in the control variables. Predictive error criteria are used to determi…