Log-Additive Parameterization of JET Electron Temperature and Density Profiles
In this document 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 determine which terms in the log-linear model to include. The density and temperature profiles are normalized to their line averages. Both the Low-mode (L-mode) and edge localized mode-free (ELM-free) high mode (H-mode) temperature profile shapes depend strongly on the type of heating power, with ion cyclotron resonant heating producing a more peaked profile than neutral beam injection. The L-mode normalized density shape depends primarily on the ratio of line average density to the edge safety factor. The current I(p), is the most important control variable for the normalized H-mode density. As the current increases, the profile broadens and the gradient at the edge sharpens. Increasing the heating power, especially the ion cyclotron resonant heating, or decreasing the average density, peaks the H-mode density profile slightly.
Bibliographic Reference: Report: JET- P(95)80 EN (1995) 37pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199610521 / Last updated on: 1996-05-13
Original language: en
Available languages: en