Ion temperature near the separatrix at ASDEX
Charge exchange neutral spectroscopy combined with gas transport models is a standard procedure to determine bulk ion temperatures in tokamak plasmas. However, in the low energy range, below 1000 eV, neutral gas models are sensitive to geometrical effects, spatial source distribution and assumptions concerning recycling. The fully 3D Monte Carlo neutral particle code EIRENE has been used to calculate the charge exchange spectra for energies below 1000 eV and to analyse this information with respect to ion temperature profiles. In the region close to the separatrix, temperatures of less than 40 eV are found, but with a sharp increase just inside the separatrix.
Bibliographic Reference: Article: 18th European Conference on Controlled Fusion and Plasma Physics, Vol. III (1991) pp. 117-121
Record Number: 199111420 / Last updated on: 1994-12-02
Original language: en
Available languages: en