Impact of calibration technique on measurement accuracy for the JET core charge-exchange system

TitleImpact of calibration technique on measurement accuracy for the JET core charge-exchange system
Publication TypeConference Proceedings
Year of Publication2008
AuthorsC. Giroud, A.G Meigs, C.R Negus, K.D Zastrow, T.M Biewer, T.W Versloot
PublisherAmer Inst Physics
Accession NumberISI:000260573500282
Keywordscalibration, plasma density, plasma diagnostics, plasma impurities, plasma temperature, plasma toroidal confinement
Abstract

The core charge-exchange diagnostic at the Joint European Torus (JET) provides measurements of the impurity ion temperature T-i, toroidal velocity V-Phi, and impurity ion densities n(imp), across the whole minor radius. A contribution to the uncertainty of the measured quantities is the error resulting from the multi-Gaussian fit and photon statistics, usually quoted for each measured data. Absolute intensity calibration and especially alignment of the viewing directions can introduce an important systematic error. The technique adopted at JET to reduce this systematic contribution to the error is presented in this paper. The error in T-i, V-Phi, and n(imp) is then discussed depending on their use.

URL<Go to ISI>://000260573500282
Division

Fusion Physics

PID

3a84d1aa7bb9cca742046d5cd73e2df3

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