Spectroscopic measurements of the ion temperature in front of a tokamak limiterFunded under: EAEC-FUSION 12C
In the beam-heated (1.3 MW) plasma of the TEXTOR tokamak, ion temperatures T(i) between 30 and 120 eV have been measured in front of a test limiter at line averaged electron densities between 4 x 1.0 E13 and 1.5 x 1.0 E13/cm3. The Doppler broadened profile of the C VI line lambda = 529 nm, excited by charge exchange with recycling hydrogen (deuterium) atoms, was used for the T(i) determination. Errors introduced by finite energy equipartition times between C(6+) and D(+) ions, by correction for fine structure and the Paschen-Back effect, and by possible blending with an O VI line, are discussed. Profile distortion by superposition of molecular D(2) lines was considerably reduced by observation with a high resolution spectrometer. Estimates of D(2) particle energies and the C(6+) poloidal rotation velocity have been performed.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 220-222 (1995) pp. 472-477
Record Number: 199510760 / Last updated on: 1995-07-12
Original language: en
Available languages: en