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Measurements and mo...
Measurements and modeling of transport and impurity radial profiles in the EXTRAP T2R reversed field pinch
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- Kuldkepp, Mattias (author)
- KTH,Fysik
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- Brunsell, Per R. (author)
- KTH,Alfvénlaboratoriet
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- Cecconello, Marco (author)
- KTH,Alfvénlaboratoriet
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- Dux, R. (author)
- Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching
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- Menmuir, Sheena (author)
- KTH,Fysik
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- Rachlew, Elisabeth (author)
- KTH,Fysik
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(creator_code:org_t)
- AIP Publishing, 2006
- 2006
- English.
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In: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 13:9, s. 092506-
- Related links:
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http://pop.aip.org/p...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Radial impurity profiles of oxygen in the rebuilt reversed field pinch EXTRAP T2R [P. R. Brunsell , Plasma Phys. Control. Fusion 43, 1457 (2001)] have been measured with a multichannel spectrometer. Absolute ion densities for oxygen peak between 1-4x10(10) cm(-3) for a central electron density of 1x10(13) cm(-3). Transport simulations with the one-dimensional transport code STRAHL with a diffusion coefficient of 20 m(2) s(-1) yield density profiles similar to those measured. Direct measurement of the ion profile evolution during pulsed poloidal current drive suggests that the diffusion coefficient is reduced by a factor similar to 2 in the core but remains unaffected toward the edge. Core transport is not significantly affected by the radial magnetic field growth seen at the edge in discharges without feedback control. This indicates that the mode core amplitude remains the same while the mode eigenfunction increases at the edge.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- Carrier concentration; Diffusion; Eigenvalues and eigenfunctions; Feedback control; Magnetic fields; Radial flow; Spectrometers; Diffusion coefficients; Multichannel spectrometers; Radial impurity; Impurities
- Plasma physics with fusion
- Plasmafysik med fusion
Publication and Content Type
- ref (subject category)
- art (subject category)
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