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The effects of reso...
The effects of resonant magnetic perturbations on fast ion confinement in the Mega Amp Spherical Tokamak
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- McClements, K. G. (author)
- Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England
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- Akers, R. J. (author)
- Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England
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- Boeglin, W. U. (author)
- Florida Int Univ, Dept Phys, Miami, FL 33199 USA
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- Cecconello, Marco (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Keeling, D. (author)
- Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England
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- Jones, O. M. (author)
- Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England; Univ Durham, Dept Phys, Durham DH1 3LE, England
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- Kirk, A. (author)
- Culham Sci Ctr, CCFE, Abingdon OX14 3DB, Oxon, England
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- Klimek, Iwona (author)
- Uppsala universitet,Tillämpad kärnfysik
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- Perez, R. V. (author)
- Florida Int Univ, Dept Phys, Miami, FL 33199 USA
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- Shinohara, K. (author)
- Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan
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- Tani, K. (author)
- Tokyo Inst Technol, Meguro Ku, Tokyo 1528550, Japan
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(creator_code:org_t)
- 2015-05-15
- 2015
- English.
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In: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 57:7
- 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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- The effects of resonant magnetic perturbations (RMPs) on the confinement of energetic (neutral beam) ions in the Mega Amp Spherical Tokamak (MAST) are assessed experimentally using measurements of neutrons, fusion protons and fast ion D alpha (FIDA) light emission. In single null-diverted (SND) MAST pulses with relatively low plasma current (400 kA), the total neutron emission dropped by approximately a factor of two when RMPs with toroidal mode number n = 3 were applied. The measured neutron rate during RMPs was much lower than that calculated using the TRANSP plasma simulation code, even when non-classical (but axisymmetric) ad hoc fast ion transport was taken into account in the latter. Sharp drops in spatially-resolved neutron rates, fusion proton rates and FIDA emission were also observed. First principles-based simulations of RMP-induced fast ion transport in MAST, using the F3D-OFMC code, show similar losses for two alternative representations of the MAST first wall, with and without full orbit effects taken into account; for n = 6 RMPs in a 600 kA plasma, the additional loss of beam power due to the RMPs was found in the simulations to be approximately 11%.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- fast ion transport
- RMPs
- FIDA
- TRANSP
- MAST
Publication and Content Type
- ref (subject category)
- art (subject category)
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McClements, K. G ...
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Akers, R. J.
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Boeglin, W. U.
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Cecconello, Marc ...
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Keeling, D.
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Jones, O. M.
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show more...
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Kirk, A.
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Klimek, Iwona
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Perez, R. V.
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Shinohara, K.
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Tani, K.
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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 ...
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and Atom and Molecul ...
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Plasma Physics a ...
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Uppsala University