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

J. Howard, A. Diallo, M. Creese, B. D. Blackwell, S. L. Allen, R. M. Ellis, G. D. Porter, W. Meyer, M. E. Fenstermacher, N. H. Brooks, M. E. Van Zeeland, R. L. Boivin
2010 Review of Scientific Instruments  
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
more » ... nd 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. Downloaded 29 Nov 2010 to 150.203.179.67. Redistribution subject to AIP license or copyright; see http://rsi.aip.org/about/rights_and_permissions 10E528-2 Howard et al. Rev. Sci. Instrum. 81, 10E528 ͑2010͒ Downloaded 29 Nov 2010 to 150.203.179.67. Redistribution subject to AIP license or copyright; see http://rsi.aip.org/about/rights_and_permissions 10E528-3 Howard et al. Rev. Sci. Instrum. 81, 10E528 ͑2010͒ Downloaded 29 Nov 2010 to 150.203.179.67. Redistribution subject to AIP license or copyright; see http://rsi.aip.org/about/rights_and_permissions 10E528-4 Howard et al. Rev. Sci. Instrum. 81, 10E528 ͑2010͒ Downloaded 29 Nov 2010 to 150.203.179.67. Redistribution subject to AIP license or copyright; see http://rsi.aip.org/about/rights_and_permissions 10E528-6 Howard et al. Rev. Sci. Instrum. 81, 10E528 ͑2010͒
doi:10.1063/1.3492422 pmid:21034056 fatcat:jq2lmxsmkve3von72coby6njq4