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Reversed field pinc...
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Brunsell, Per R.KTH,Alfvénlaboratoriet
(författare)
Reversed field pinch operation with intelligent shell feedback control in EXTRAP T2R
- Artikel/kapitelEngelska2006
Förlag, utgivningsår, omfång ...
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2006-09-28
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IOP Publishing,2006
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-6558
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-6558URI
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https://doi.org/10.1088/0029-5515/46/11/004DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20100810
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Discharges in the thin shell reversed field pinch (RFP) device EXTRAP T2R without active feedback control are characterized by growth of non-resonant m = 1 unstable resistive wall modes (RWMs) in agreement with linear MHD theory. Resonant m = 1 tearing modes (TMs) exhibit initially fast rotation and the associated perturbed radial fields at the shell are small, but eventually TMs wall-lock and give rise to a growing radial field. The increase in the radial field at the wall due to growing RWMs and wall-locked TMs is correlated with an increase in the toroidal loop voltage, which leads to discharge termination after 3-4 wall times. An active magnetic feedback control system has been installed in EXTRAP T2R. A two-dimensional array of 128 active saddle coils (pair-connected into 64 independent m = 1 coils) is used with intelligent shell feedback control to suppress the m = 1 radial field at the shell. With feedback control, active stabilization of the full toroidal spectrum of 16 unstable m = 1 non-resonant RWMs is achieved, and TM wall locking is avoided. A three-fold extension of the pulse length, up to the power supply limit, is observed. Intelligent shell feedback control is able to maintain the plasma equilibrium for 10 wall times, with plasma confinement parameters sustained at values comparable to those obtained in thick shell devices of similar size.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Kuldkepp, MattiasKTH,Fysik(Swepub:kth)u1hefb9f
(författare)
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Menmuir, SheenaKTH,Fysik(Swepub:kth)u12gjaah
(författare)
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Cecconello, MarcoKTH,Alfvénlaboratoriet(Swepub:kth)u1hwqk6o
(författare)
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Hedqvist, AndersKTH,Fysik(Swepub:kth)u1kiq1ip
(författare)
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Yadikin, DimitryKTH,Alfvénlaboratoriet(Swepub:kth)u1zgfyey
(författare)
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Drake, James RobertKTH,Alfvénlaboratoriet(Swepub:kth)u1ci9ir2
(författare)
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Rachlew, ElisabethKTH,Fysik(Swepub:kth)u12i3o9i
(författare)
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KTHAlfvénlaboratoriet
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Nuclear Fusion: IOP Publishing46:11, s. 904-9130029-55151741-4326
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