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Real-time determination of magnetic island location for neoclassical tearing mode control in DIII-D
- Source :
- Plasma Physics and Controlled Fusion; September 2006, Vol. 48 Issue: 9 p1447-1454, 8p
- Publication Year :
- 2006
-
Abstract
- Accurate measurement of island location is crucial for efficient suppression of the neoclassical tearing mode by electron cyclotron current drive (ECCD). In the control system on DIII-D the contour of the resonant q-surface is measured in real time based on real-time magnetohydrodynamic reconstructions, EFITs, that include motional Stark effect measurements of pitch angle in the analysis. A new method for determination of the radial position of the q-surface using a 40 channel electron cyclotron emission radiometer has been developed. This method analyses localized temperature fluctuations caused by motion of the island and can be used by the plasma control system as a complementary measurement of the radial position of the q-surface contour for faster and more accurate alignment of the ECCD.
Details
- Language :
- English
- ISSN :
- 07413335
- Volume :
- 48
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Plasma Physics and Controlled Fusion
- Publication Type :
- Periodical
- Accession number :
- ejs56534453
- Full Text :
- https://doi.org/10.1088/0741-3335/48/9/013