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|Title:||Theoretical transport model for tokamaks|
|Author(s):||Ghanem, Elsayed Mohammad|
|Doctoral Committee Chair(s):||Singer, Clifford E.|
|Department / Program:||Nuclear, Plasma, and Radiological Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
Physics, Fluid and Plasma
|Abstract:||In the present thesis work a theoretical transport model is suggested to study the anomalous transport of plasma particles and energy across the axisymmetric equilibrium toroidal magnetic flux surfaces in tokamaks. The model suggests a linear combination of two transport mechanisms; drift waves, which dominate the transport in the core region, and resistive ballooning modes, which dominate the transport in the edge region. The resulting unified model has been used in a predictive transport code to simulate the plasma transport in different tokamak experiments operating in both the ohmic heating phase and the low confinement mode (L-mode).
For ohmic plasma, the model was used to study the saturation of energy confinement time at high plasma density. The effect of the resistive ballooning mode as a possible cause of the saturation phenomena has been investigated together with the effect of the ion temperature gradient mode.
For the low confinement mode plasmas, the study has emphasized on using the model to obtain a scaling law for the energy confinement time with the various plasma parameters compared to the scaling laws that are derived based on fitting the experimental data.
|Rights Information:||Copyright 1991 Ghanem, Elsayed Mohammad|
|Date Available in IDEALS:||2011-05-07|
|Identifier in Online Catalog:||AAI9210813|
This item appears in the following Collection(s)
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois
Dissertations and Theses - Nuclear, Plasma, and Radiological Engineering