ENERGY-DISPERSIVE X-RAY SPECTROSCOPY FOR ECR PLASMA DIAGNOSTICS

Electron-ion bremsstrahlung spectra down to 4 keV emitted from plasmas of the 7.25 GHz electron cyclotron resonance (ECR) ion source of the Forschungszentrum Rossendorf and of the 14.5 GHz ECR ion source of the Technische Universitat (TU) Dresden were de-convoluted using a newly developed integration method. In the approximation of isotropy in velo city space this method yields the exact electron energy distribution f unction. The high energetic electrons are clearly separated into two B oltzmann distributed populations. Their densities and temperatures cou ld be estimated. Higher frequencies of the microwave can increase the hot and warm electron densities by orders of magnitude. First results are obtained for the behaviour of this populations belonging to the mi xture (argon - oxygen). Gas mixing increases the densities of these po pulations. The influence of the electron energy distribution function on X-ray line intensities is discussed.