Investigations on the transport of light impurities at ASDEX-Upgrade
The radial transport of light impurities at ASDEX-Upgrade was investigated. Firstly, the influence of the involved disturbance processes on the line profiles was discussed. In order to allow the measurement of the parameters of impurity transport charge exchange recombination spectroscopy (CXRS) was developed. The density of the impurities was determined by use of an iterative process. It was shown that the method used to determine transport coefficients describes the measurements well. The diffusion coefficient does not depend on the kind of impurity injected or on the electron density. The dependence of diffusion coefficients and electron transport parallelism was determined. It was confirmed that the neo-classical theory of transport cannot explain diffusion. The impurity diffusion coefficient is in good agreement with electron diffusion coefficient and heat conductivity.
Bibliographic Reference: Report: IPP 10/8 DE (1997) 106pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
Record Number: 199711489 / Last updated on: 1997-12-09
Original language: de
Available languages: de