Details

Autor(en) / Beteiligte

• 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.

Titel

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

Ist Teil von

• Review of scientific instruments, 2010-10, Vol.81 (10), p.10E528-10E528-6

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.