Real time ECE-MIRNOV cross-correlations by dual phase lock-in technique in FTU

E. Alessi, C. Sozzi, C. Galperti, A. Botrugno, G. Calabrò, C. Marchetto, G. Pucella, S. Nowak, O. Tudisco

Research output: Contribution to conferencePaper

Abstract

Cross-correlations between magnetic (Mirnov) and electronic temperature (ECE) fluctuations are a widely used tool to locate the instantaneous O-point position of magnetic islands. These quantities, when calculated in the time domain as in Real Time (RT) application, can suffer of errors due to the phase difference between the two diagnostic signals. Phase differences can change along the time, since they depend on acquisition systems as well as on the coil position and the (m,n) mode order numbers. The procedure already implemented in the RT controller under development for FTU is being upgraded to avoid this problem by making use of the dual phase lock-in technique (DPT). The comparison between the old and the new procedure and their results on data acquired in RT is here presented. Copyright © (2013) by the European Physical Society (EPS). Copyright © (2013) by the European Physical Society (EPS).
Original languageEnglish
Publication statusPublished - 2013
Externally publishedYes
Event40th EPS Conference on Plasma Physics, EPS 2013 - , Finland
Duration: 1 Jan 2013 → …

Conference

Conference40th EPS Conference on Plasma Physics, EPS 2013
CountryFinland
Period1/1/13 → …

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Alessi, E., Sozzi, C., Galperti, C., Botrugno, A., Calabrò, G., Marchetto, C., ... Tudisco, O. (2013). Real time ECE-MIRNOV cross-correlations by dual phase lock-in technique in FTU. Paper presented at 40th EPS Conference on Plasma Physics, EPS 2013, Finland.