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Density peaking in ...
Density peaking in low collisionality ELMy H-mode in JET
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Valovic, M. (author)
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Budny, R. (author)
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Garzotti, L. (author)
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Garbet, X. (author)
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Korotkov, A. A. (author)
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Rapp, J. (author)
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Neu, R. (author)
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Sauter, O. (author)
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deVries, P. (author)
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Alper, B. (author)
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Beurskens, M. (author)
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- Brzozowski, Jerzy H. (author)
- KTH,Alfvénlaboratoriet
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McDonald, D. (author)
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Leggate, H. (author)
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Giroud, C. (author)
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Parail, V. (author)
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Voitsekhovitch, I. (author)
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(creator_code:org_t)
- 2004-11-17
- 2004
- English.
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In: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 46:12, s. 1877-1889
- Related links:
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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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- Low collisionality, low particle source. ELMy H-modes (type-III) with sawteeth are produced in JET in order to address the question of density profile evolution in the reference q(95) = 3 ITER scenario. The paper focuses on particle transport in the core zone around the mid-radius. The pedestal region including ELMs and the region affected by sawteeth are not considered. By replacing a significant part of the neutral beam heating by RF power the beam particle flux at mid-radius has been reduced to Gamma(Beam)/n(e) = 0.07 m s(-1). The additional flux due to wall neutrals is estimated as Gamma(Wall)/n(e) = 0.12 m s(-1). Density profiles are found to be modestly peaked under these conditions with a relative density difference of Deltan/(n) = 0.23 across the zone not affected by sawteeth and ELMs. In a region around the mid-radius the ratio of effective particle diffusivity to electron thermal diffusivity is found to be D-e,D-eff/chi(e) approximate to 0.2, which might indicate an anomalous pinch provided the particle diffusivity D-e is sufficiently lame. The measured values of D-e,D-eff/chi(e) are at the lower end of the range used in ITER models.
Keyword
- transport
- plasma
- confinement
- profile
- core
- flux
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Valovic, M.
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Budny, R.
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Garzotti, L.
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Garbet, X.
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Korotkov, A. A.
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Rapp, J.
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show more...
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Neu, R.
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Sauter, O.
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deVries, P.
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Alper, B.
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Beurskens, M.
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Brzozowski, Jerz ...
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McDonald, D.
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Leggate, H.
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Giroud, C.
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Parail, V.
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Voitsekhovitch, ...
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show less...
- Articles in the publication
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Plasma Physics a ...
- By the university
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Royal Institute of Technology