TITLE

Doppler coherence imaging and tomography of flows in tokamak plasmas (invited)

AUTHOR(S)
Howard, J.; Diallo, A.; Creese, M.; Blackwell, B. D.; Allen, S. L.; Ellis, R. M.; Porter, G. D.; Meyer, W.; Fenstermacher, M. E.; Brooks, N. H.; Van Zeeland, M. E.; Boivin, R. L.
PUB. DATE
October 2010
SOURCE
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10E528
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This article describes the results of spatial heterodyne Doppler 'coherence imaging' of carbon ion flows in the divertor region of the DIII-D tokamak. Spatially encoded interferometric projections of doubly ionized carbon emission at 465 nm have been demodulated and tomographically inverted to obtain the spatial distribution of the carbon ion parallel flow and emissivity. The operating principles of the new instruments are described, and the link between measured properties and line integrals of the flow field are established. An iterative simultaneous arithmetic reconstruction procedure is applied to invert the interferometric phase shift projections, and the reconstructed parallel flow field amplitudes are found to be in reasonable agreement with UEDGE modeling.
ACCESSION #
54858046

 

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