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Abstract

Electron temperature and density measurements by periodically pulsed 90 degrees Thomson scattering were performed for the first time for the whole duration of a tokamak discharge. A 60 pps Nd:YAG laser at 1.06 mu was used in the Garching ASDEX tokamak in combination with Si avalanche photodiode detectors. Density calibration was done by rotational anti-Stokes Raman scattering from molecular hydrogen. The system is used for measurements at electron densities as low as 2 x 10**12cm**-3. Results are presented for measurements with one spatial channel located at the plasma centre and for a spatially scanning detection optics. The prospects of this new Thomson scattering scheme for future plasma devices are discussed.

Additional information

Authors: SALZMANN H, UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);HIRSCH K, UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);ROEHR H, UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);STEUER K H, UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);SCHRAMM G UNIVERSITAET STUTTGART (GERMANY), UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY), UNIVERSITAET STUTTGART (GERMANY);MAX-PLANCK- INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY)
Bibliographic Reference: WORKSHOP ON DIAGNOSTICS FOR FUSION REACTOR CONDITIONS, VARENNA, COMO (ITALY), SEPT. 6-17, 1982, PP. 11-22 351 P., 1983, ISBN 0-08-031161-X WRITE TO PERGAMON PRESS LTD., HEADINGTON HILL HALL, OXFORD OX3 OBW (ENGLAND), PRICE: UKL 47, (EUR 8351 EN).
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