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Abstract

The results of bench tests performed on a new method of combined interferometry/polarimetry for the magnetic field reconstruction of tokamak plasmas is presented. In particular, the sensitivity obtained in the polarimetric measurement shows the feasibility of Faraday rotation determination approaching a precision of +/- 0.2 . The method is based on an optically pumped far-infrared (FIR) laser with a rotating polarization where both the interferometric and polarimetric information is determined from phase measurements. Specific sources which introduce disturbances in the optical arrangement and which can limit the attainment of the polarimetric precision, mentioned above, are discussed.

Additional information

Authors: BARRY S, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas (CH);NIESWAND C, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas (CH);PRUNTY S L, University College Cork, Department of Electrical Engineering and Microelectronics (IE);MANSFIELD H M, University College Cork, Department of Electrical Engineering and Microelectronics (IE);O'LEARY P, University College Cork, Department of Electrical Engineering and Microelectronics (IE)
Bibliographic Reference: Article: Review of Scientific Instruments (1996)
Record Number: 199611377 / Last updated on: 1996-12-04
Category: PUBLICATION
Original language: en
Available languages: en