Real-time MSE measurements for current profile control on KSTAR

M.F.M. Bock, de, D.U.B. Aussems, R.T. Huijgen, M. Scheffer, J. Chung

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)
113 Downloads (Pure)

Abstract

To step up from current day fusion experiments to power producing fusion reactors, it is necessary to control long pulse, burning plasmas. Stability and confinement properties of tokamak fusion reactors are determined by the current or q profile. In order to control the q profile, it is necessary to measure it in real-time. A real-time motional Stark effect diagnostic is being developed at Korean Superconducting Tokamak for Advanced Research for this purpose. This paper focuses on 3 topics important for real-time measurements: minimize the use of ad hoc parameters, minimize external influences and a robust and fast analysis algorithm. Specifically, we have looked into extracting the retardance of the photo-elastic modulators from the signal itself, minimizing the influence of overlapping beam spectra by optimizing the optical filter design and a multi-channel, multiharmonic phase locking algorithm.
Original languageEnglish
Article number10D524
Pages (from-to)10D524-1/4
Number of pages3
JournalReview of Scientific Instruments
Volume83
Issue number10
DOIs
Publication statusPublished - 2012

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