Application of visible spectroscopy to the Tore Supra tokamak
One of the objectives of Tore Supra is to monitor the plasma boundary and, in particular, to identify the sources of impurities on the boundary. This research project presents two measurements of the electromagnetic spectrum radiated by the hot plasma: measurement of intensity and width of the spectrum lines produced by the ions of the plasma boundary and measurement of the continuous radiation which is superimposed onto the emission spectrum lines. Several sets of fibres are fitted to Tore Supra as part of an experimental system in which each of the fibres is coupled to a photomultiplier with an interference filter to distinguish the continuous base of the lines emitted by the plasma. Two sets of fibres are used for the measurement of the continuous base, which supplies a Z(eff) value for the positive ions. A set of 9 fibres is connected to a spectrometer equipped with a fast multiplexing system and a multichannel detector to estimate the incoming flow of the various impurities and the corresponding ion temperatures. An experimental deconvolution of the line profiles is presented.
Bibliographic Reference: Paper presented: 2ème Congrès de la Division de Plasma, Orsay (FR), Sept. 3-4, 1990
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Record Number: 199011509 / Last updated on: 1994-12-02
Original language: fr
Available languages: fr