A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils

Details A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ppcf...50l5005k&link_type=abstract

Plasma Physics and Controlled Fusion, Volume 50, Issue 12, pp. 125005 (2008).

Physics

Plasma Physics

7

Scientific paper

A new method for identifying toroidal mode numbers in Mirnov data from toroidal plasmas has been found, and benchmarked with simulated and real data from the JET tokamak. Embodied in the SparSpec code, and originally developed for the analysis of unevenly time-sampled astronomical data, this new method fits signals which are unevenly sampled in the toroidal coordinate to a sum of an arbitrarily large number of toroidal modes with integer mode numbers. The method has proven to be extremely robust, and is especially useful for resolving the amplitudes and phases of multiple Alfvén eigenmodes (AEs) which are ringing with the same or nearly the same frequency. The great efficiency with which the SparSpec method detects multiple modes in large datasets suggests that it may be used in real-time applications such as resistive wall mode or tearing mode control, among others. Examples involving unstable AEs as well as stable AEs, (excited by an array of external antennas) in the JET tokamak are used to illustrate the efficacy of the method. Some additional general considerations regarding optimized spatial sampling strategies are also briefly addressed.

Affiliated with

Also associated with

No associations

Rating

A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A sparsity-based method for the analysis of magnetic fluctuations in unevenly-spaced Mirnov coils will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-795611