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JET intrinsic rotat...
JET intrinsic rotation studies in plasmas with a high normalized beta and varying toroidal field ripple
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Nave, M. F. F. (author)
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Eriksson, L-G (author)
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Giroud, C. (author)
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- Johnson, Thomas J. (author)
- KTH,Fusionsplasmafysik
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Kirov, K. (author)
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Mayoral, M-L (author)
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Noterdaeme, J-M (author)
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Ongena, J. (author)
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Saibene, G. (author)
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Sartori, R. (author)
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Rimini, F. (author)
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Tala, T. (author)
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de Vries, P. (author)
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Zastrow, K-D (author)
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(creator_code:org_t)
- 2012-06-22
- 2012
- English.
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In: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 54:7, s. 074006-
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http://pubman.mpdl.m...
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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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- Understanding the origin of rotation in ion cyclotron resonance frequency (ICRF) heated plasmas is important for predictions for burning plasmas sustained by alpha particles, being characterized by a large population of fast ions and no external momentum input. The angular velocity of the plasma column has been measured in JET H-mode plasmas with pure ICRF heating both for the standard low toroidal magnetic ripple configuration, of about similar to 0.08% and, for increased ripple values up to 1.5% (Nave et al 2010 Phys. Rev. Lett. 105 105005). These new JET rotation data were compared with the multi-machine scaling of Rice et al (2007 Nucl. Fusion 47 1618) for the Alfven-Mach number and with the scaling for the velocity change from L-mode into H-mode. The JET data do not fit well any of these scalings that were derived for plasmas that are co-rotating with respect to the plasma current. With the standard low ripple configuration, JET plasmas with large ICRF heating power and normalized beta, beta(N) approximate to 1.3, have a very small co-current rotation, with Alfven-Mach numbers significantly below those given by the rotation scaling of Rice et al (2007 Nucl. Fusion 47 1618). In some cases the plasmas are actually counter-rotating. No significant difference between the H-mode and L-mode rotation is observed. Typically the H-mode velocities near the edge are lower than those in L-modes. With ripple values larger than the standard JET value, between 1% and 1.5%, H-mode plasmas were obtained where both the edge and the core counter-rotated.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Aerodynamics
- Mach number
- Plasma simulation
- Rotation
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Nave, M. F. F.
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Eriksson, L-G
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Giroud, C.
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Johnson, Thomas ...
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Kirov, K.
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Mayoral, M-L
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show more...
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Noterdaeme, J-M
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Ongena, J.
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Saibene, G.
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Sartori, R.
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Rimini, F.
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Tala, T.
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de Vries, P.
-
Zastrow, K-D
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Plasma Physics a ...
- By the university
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Royal Institute of Technology