Study of cyclotronic electronic waves in fusion plasmaFunded under: EAEC-FUSION 12C
The first two chapters of this thesis cover the elements of the subject. A general model illustrates the elementary interaction of electromagnetic waves and particles. An elementary calculus shows that the electrons in the tokamak absorb waves at the cyclotron frequency. Cyclotron waves are examined whilst explaining the dispersion relationship of a hot, magnetised, non-homogeneous plasma, and the absorption and dispersion properties of the ordinary and extraordinary polarisation modes are highlighted in the case of the quasi-Maxwellian plasma of the tokamak. Cyclotron emission complements the properties of the electrons moving around the magnetic field lines communicated to them. The subsequent chapters deal with the classical theories of uncoupled electrons. The characteristic situations of weak turbulence illustrate the quasi-linear theory. The formation of the train of uncoupled electrons and classical transfers is then discussed. The linear theory is generalised to permit effective description of the absorption and emission properties of cyclotron waves by the electrons of an unknown train. The propagation of cyclotron waves is then examined, taking into account the resonances between the thermal electrons and the waves. The final chapter is devoted to the structure of the electron distribution function created by a spectrum of waves at lower hybrid frequency.
Bibliographic Reference: Report: CEA-FC-1551 FR (1995) 150 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199511528 / Last updated on: 1995-12-12
Original language: fr
Available languages: fr