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Seraydarian, R.P.; Burrell, K.H.; Groebner, R.J.
General Atomics Co., San Diego, CA (USA)1988
General Atomics Co., San Diego, CA (USA)1988
AbstractAbstract
[en] A pair of visible/near uv spectrometers with eight viewing chords apiece have been installed on the DIII-D tokamak. Each system views a neutral heating beam, and can acquire up to 250 complete spectra from each chord with 5-20 msec time resolution. Each viewing chord covers 60 A with 0.27 A spectral resolution, and the chords span about 2/3 of the plasma's full width. By viewing Doppler broadened spectral lines from charge exchange recombination (CER) reactions between beam neutrals and plasma ions, ion temperatures up to keV have been meassured, and the bulk Doppler shift of these same lines has yielded plasma rotation velocities up to 200 km/sec. The constancy of temperature on a magnetic flux surface and the rigid rotor model of a flux surface have been confirmed. These instruments have also been used to measure the neutral beam deposition profile, and preliminary experimental results agree with theoretical calculations of the beam deposition profile. 5 refs., 6 figs
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Feb 1988; 21 p; 7. topical conference on high temperature plasma diagnostics; Napa, CA (USA); 13-17 Mar 1988; CONF-880364--24; Available from NTIS, PC A03/MF A01; 1 as DE88010584
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