Bench Test Results on a new Technique for Far InfraRed Polarimetry

S. Barry, C. Nieswand, S. L. Prunty, H. M. Mansfield, P. O'Leary

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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 laser with a rotating polarization where both the interferometric and polarimetric information is determined from phase measurements. Specific sources that introduce disturbances in the optical arrangement and that can limit the attainment of the polarimetric precision, mentioned above, are discussed.
Original languageEnglish
Pages (from-to)2037-2039
Number of pages3
JournalReview of Scientific Instruments
Issue number5
Publication statusPublished - May 1997
Externally publishedYes


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