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Current profile mod...
Current profile modification experiments in EXTRAP T2R
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- Cecconello, Marco (författare)
- KTH,Alfvénlaboratoriet
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- Malmberg, Jenny A. (författare)
- KTH,Alfvénlaboratoriet
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Spizzo, G. (författare)
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Chapman, B. E. (författare)
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- Gravestjin, Robert M. (författare)
- KTH,Fysik
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Franz, P. (författare)
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Piovesan, P. (författare)
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Martin, P. (författare)
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- Drake, James R. (författare)
- KTH,Alfvénlaboratoriet
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(creator_code:org_t)
- 2003-11-27
- 2004
- Engelska.
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Ingår i: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 46:1, s. 145-161
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Pulsed poloidal current drive (PPCD) experiments have been conducted in the resistive shell EXTRAP T2R reversed-field pinch experiment. During the current profile modification phase, the fluctuation level of the m = 1 internally resonant tearing modes decreases, and the velocity of these modes increases. The m = 0 modes are not affected during PPCD, although termination occurs with a burst in the m = 0 amplitude. The PPCD phase is characterized by an increase in the central electron temperature (up to 380 eV) and in the soft x-ray signal. Spectroscopic observations confirm an increase in the central electron temperature. During PPCD, the plasma poloidal beta increases to 14%, and the estimated energy confinement time doubles, reaching 380 mus. The reduction in the fluctuation level and the corresponding increase in the energy confinement time are qualitatively consistent with a reduction in parallel transport along stochastic magnetic field lines.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- reversed-field pinch
- poloidal current drive
- improved confinement
- transport reduction
- resistive wall
- plasma
- rfx
- instabilities
- ppcd
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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