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The time evolution of the electron temperature was studied in TEXTOR discharges by means of an 8-channel heterodyne ECE-system of very low noise figure. Typical profile developments during current ramping, gas injection and soft landing phases were detected by continuous recording of ECE-data and off-line computer processing. The present time resolution of 100 microsec allowed the observation of rapid profile changes during disruptive events of the discharge. The spatial resolution of the T(e)-measurement in the radial direction was 2 cm and in the vertical direction it was 5 cm. The ECE-channels were calibrated relatively by means of an oven with a surface temperature of 600 C and absolutely by a series of soft x-ray temperature determinations.

Additional information

Authors: WAIDMANN G, Institut fur Plasmaphysik, Kernforschungsanlage Julich GmbH (DE);CAO Y, Institut fur Plasmaphysik, Kernforschungsanlage Julich GmbH (DE);KARDON B, Institut fur Plasmaphysik, Kernforschungsanlage Julich GmbH (DE)
Bibliographic Reference: Paper presented: 15th European Conference on Controlled Fusion and Plasma Heating, Dubrovnik (YU), May 16-20, 1988
Availability: Available from (1) as Paper EN 34375 ORA
Record Number: 198910176 / Last updated on: 1994-12-01
Original language: en
Available languages: en