The multichannel triple-laser interferometer/polarimeter system at RTP

A 19-channel combined interferometer and polarimeter system has recently become operational at the Rijnhuizen Tokamak Project (a=0.164  m , R=0.72  m , B tor ⩽2.5  T , I p ⩽150  kA , plasma pulse duration ⩽500  ms ) , in order to determine the poloidal magnetic field and plasma density distribution...

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Bibliographic Details
Published in:Review of Scientific Instruments 1997-02, Vol.68 (2), p.1217-1226
Main Authors: Rommers, J. H., Donné, A. J. H., Karelse, F. A., Howard, J.
Format: Article
Language:English
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Summary:A 19-channel combined interferometer and polarimeter system has recently become operational at the Rijnhuizen Tokamak Project (a=0.164  m , R=0.72  m , B tor ⩽2.5  T , I p ⩽150  kA , plasma pulse duration ⩽500  ms ) , in order to determine the poloidal magnetic field and plasma density distribution simultaneously. The method is based on the separate propagation of two counter-rotating, circularly polarized probing waves, and enables high temporal resolution measurements of both the interferometric and the polarimetric phase change using only one detector per line of sight. In this article a thorough discussion of the (polarization-related) optical, electronic, and computational aspects of the system will be presented.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1147884