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Charge exchange recombination spectroscopy at Wendelstein 7-X.
Review of Scientific Instruments ( IF 1.587 ) Pub Date : 2020-02-01 , DOI: 10.1063/1.5132936
O P Ford,L Vanó,J A Alonso,J Baldzuhn,M N A Beurskens,C Biedermann,S A Bozhenkov,G Fuchert,B Geiger,D Hartmann,R J E Jaspers,A Kappatou,A Langenberg,S A Lazerson,R M McDermott,P McNeely,T W C Neelis,N A Pablant,E Pasch,N Rust,R Schroeder,E R Scott,H M Smith,Th Wegner,F Kunkel,R C Wolf,

The Charge Exchange Recombination Spectroscopy (CXRS) diagnostic has become a routine diagnostic on almost all major high temperature fusion experimental devices. For the optimized stellarator Wendelstein 7-X (W7-X), a highly flexible and extensive CXRS diagnostic has been built to provide high-resolution local measurements of several important plasma parameters using the recently commissioned neutral beam heating. This paper outlines the design specifics of the W7-X CXRS system and gives examples of the initial results obtained, including typical ion temperature profiles for several common heating scenarios, toroidal flow and radial electric field derived from velocity measurements, beam attenuation via beam emission spectra, and normalized impurity density profiles under some typical plasma conditions.
更新日期:2020-02-28

 

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