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Table of contents
1. Introduction
1.1. Magnetic confined fusion
1.2. Turbulence in magnetized plasma
1.3. Microwave diagnostics
1.4. Scope of this thesis
2. Turbulence and its characterization
2.1. Turbulence-driven transport in the tokamak
2.2. Turbulence characteristics
2.3. Typical tokamak instabilities
2.4. Measurement of turbulence parameters
3. Doppler reflectometry and radial correlation Doppler reflectometry techniques
3.1. Theoretical basis
3.2. Measured quantities
3.3. Validity of interpretation
3.4. Linear scattering effects
3.5. Nonlinear scattering effects
4. Numerical modelling
4.1. Linear modelling tools
4.2. Nonlinear modelling tools
4.3. Plasma modelling
5. FT-2 tokamak experiment
5.1. Studied discharge
5.2. DR and RCDR setup
6. Analytical study of cylindrical geometry effects
6.1. Basic equations
6.2 BS signal
6.2. FS signal
6.3. Total signal and CCF
7. RCDR analysis for tilted turbulent structures
7.1. Basic equations
7.2. CCF at suppressed small-angle scattering
7.3. CCF for small-angle scattering dominance
7.4. Validation with numerical modelling
7.5. Discussion
8. Nonlinear regime transition study
8.1. Basic equations
8.2. Quadratic scattering signal
8.3. Nonlinear transition criterion
8.4. Analytical results discussion
8.5. Numerical validation
8.6. Conclusions and discussion
9. Synthetic DR and RCDR diagnostics
9.1. Experimental benchmarking of X-mode modelling
9.2. Different ELMFIRE cases used for modelling
9.3. Nonlinear scattering effects in X-mode modelling
9.4. O-mode synthetic diagnostic
9.5. Discussion
10. Conclusions
11. Outlook
Acknowledgements
Bibliography
