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ELMs and strike poi...
ELMs and strike point movements
- Article/chapterEnglish2008
Publisher, publication year, extent ...
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2008-04-21
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IOP Publishing,2008
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-17664
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-17664URI
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https://doi.org/10.1088/0029-5515/48/6/065005DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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A detailed study of position changes of plasma strike points before and after edge localized modes (ELMs) in JET was carried out. A hypothesis being tested is that in an ELM previously closed edge field lines would open up, releasing plasma current and leading to the formation of a new, smaller separatrix. It was observed that after each ELM strike points have shifted a few centimetres towards the plasma centre ( up in JET). In some cases a transient (< 100 mu s), upwards large (> 10 cm) jump of strike positions was observed first. It was followed by an equally fast jump down to the shifted strike positions. Such behaviour has not been described in previous computational models of the ELM. Therefore two novel instability mechanisms are presented, which contribute to explain the changes in strike point position: an X-point instability, due to positive toroidal current density at the X-point, and a diamagnetic instability, due to negative inboard toroidal current density.
Subject headings and genre
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edge localized modes
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magnetohydrodynamic stability
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transport barrier
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mhd activity
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i elms
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jet
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tokamaks
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divertor
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plasmas
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instabilities
Added entries (persons, corporate bodies, meetings, titles ...)
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Jachmich, S.
(author)
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Villone, F.
(author)
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Hawkes, N.
(author)
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Corre, Y.
(author)
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Alper, B.
(author)
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Loarte, A.
(author)
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Pitts, R. A.
(author)
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Guenther, K.
(author)
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Korotkov, A.
(author)
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Stamp, M.
(author)
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Andrew, P.
(author)
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Conboy, J.
(author)
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Bolzonella, T.
(author)
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Kempenaars, M.
(author)
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Cenedese, A.
(author)
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Rachlew, ElisabethKTH,Atom- och molekylfysik(Swepub:kth)u12i3o9i
(author)
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KTHAtom- och molekylfysik
(creator_code:org_t)
Related titles
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In:Nuclear Fusion: IOP Publishing48:60029-55151741-4326
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- By the author/editor
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Solano, E. R.
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Jachmich, S.
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Villone, F.
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Hawkes, N.
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Corre, Y.
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Alper, B.
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show more...
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Loarte, A.
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Pitts, R. A.
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Guenther, K.
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Korotkov, A.
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Stamp, M.
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Andrew, P.
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Conboy, J.
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Bolzonella, T.
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Kempenaars, M.
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Cenedese, A.
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Rachlew, Elisabe ...
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show less...
- Articles in the publication
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Nuclear Fusion
- By the university
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Royal Institute of Technology