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Localization of MHD modes and consistency with q-profiles in JET
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2010 (English)In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH: SECTION A - ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT    , 2010, Vol. 623, no 2, 734-737 p.Conference paper, Published paper (Refereed)
Abstract [en]

The measurement of the safety factor q in tokamaks, which describes the winding of the helical magnetic field lines, is very important especially for the achievement of advanced scenarios. The motional Stark effect diagnostic can provide a direct measurement of the magnetic field orientation but the derivation of the q-profiles requires a simulation of the magnetic equilibrium taking into account inputs from several other diagnostics. This analysis can be affected by large errors. In order to validate the results, q-profiles are compared with the radii of MHD modes, which can be attributed to surfaces of known q.

Place, publisher, year, edition, pages
2010. Vol. 623, no 2, 734-737 p.
Series
Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment, ISSN 0168-9002
Keyword [en]
Plasma physics, Tokamak, q-Profile
Identifiers
URN: urn:nbn:se:kth:diva-27664DOI: 10.1016/j.nima.2010.04.151ISI: 000284343600022Scopus ID: 2-s2.0-77957942397OAI: oai:DiVA.org:kth-27664DiVA: diva2:381235
Conference
1st International Conference on Frontiers in Diagnostic Technologies Frascati, ITALY, NOV 25-29, 2009
Note
QC 20101223Available from: 2010-12-25 Created: 2010-12-20 Last updated: 2010-12-25Bibliographically approved

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Rachlew, Elisabeth

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