DOIAbstract
A Thomson scattering device has been designed and built, especially adapted to the characteristics of the ERASMUS tokamak. The system is characterized by its compactness, flexibility in operation, extensive motorization and ease of maintenance. The spectrum of the scattered light is analysed at 5 wavelengths between the ruby and the Hα-line. All optical parts are housed in a single compact frame, that is mounted on an airtrack, facilitating alignment and calibration. Measurements of T e-values from 20 up to 350 eV with ne ≳ 8 x 10 11 cm-3 are routinely performed and radial profiles are taken over 30 cm of the 39 cm plasma diameter with a resolution of 3 cm
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