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Mitigation of type-...
Mitigation of type-I ELMs with n=2 fields on JET with ITER-like wall
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Liang, Y. (författare)
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Lomas, P. (författare)
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Nunes, I. (författare)
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Gryaznevich, M. (författare)
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Beurskens, M. N. A. (författare)
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Brezinsek, S. (författare)
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Coenen, J. W. (författare)
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Denner, P. (författare)
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Eich, Th (författare)
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- Frassinetti, Lorenzo (författare)
- KTH,Fusionsplasmafysik
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Gerasimov, S. (författare)
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Harting, D. (författare)
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Jachmich, S. (författare)
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Meigs, A. (författare)
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Pearson, J. (författare)
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Rack, M. (författare)
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Saarelma, S. (författare)
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Sieglin, B. (författare)
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Yang, Y. (författare)
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Zeng, L. (författare)
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(creator_code:org_t)
- 2013-06-18
- 2013
- Engelska.
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Ingår i: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 53:7, s. 073036-
- 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
- Mitigation of type-I edge-localized modes (ELMs) was observed with the application of an n = 2 field in H-mode plasmas on the JET tokamak with the ITER-like wall (ILW). Several new findings with the ILW were identified and contrasted to the previous carbon wall (C-wall) results for comparable conditions. Previous results for high collisionality plasmas (nu*(e,ped) similar to 2.0) with the C-wall saw little or no influence of either n = 1 or n = 2 fields on the ELMs. However, recent observations with the ILW show large type-I ELMs with a frequency of similar to 45 Hz were replaced by high-frequency (similar to 200 Hz) small ELMs during the application of the n = 2 field. With the ILW, splitting of the outer strike point was observed for the first time during the strong mitigation of the type-I ELMs. The maximal surface temperature (T-max) on the outer divertor plate reached a stationary state and has only small variations of a few degrees due to the small mitigated ELMs. In moderate collisionality (nu*(e,ped) similar to 0.8) H-mode plasmas, similar to previous results with the C-wall, both an increase in the ELM frequency and density pump-out were observed during the application of the n = 2 field. There are two new observations compared with the C-wall results. Firstly, the effect of ELM mitigation with the n = 2 field was seen to saturate so that the ELM frequency did not further increase above a certain level of n = 2 magnetic perturbations. Secondly splitting of the outer strike point during the ELM crash was seen, resulting in mitigation of the maximal ELM peak heat fluxes on the divertor region.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Collisionality
- Divertor region
- Edgelocalized modes
- High frequency HF
- Magnetic perturbation
- Small variations
- Stationary state
- Surface temperatures
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Liang, Y.
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Lomas, P.
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Nunes, I.
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Gryaznevich, M.
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Beurskens, M. N. ...
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Brezinsek, S.
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visa fler...
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Coenen, J. W.
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Denner, P.
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Eich, Th
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Frassinetti, Lor ...
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Gerasimov, S.
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Harting, D.
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Jachmich, S.
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Meigs, A.
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Pearson, J.
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Rack, M.
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Saarelma, S.
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Sieglin, B.
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Yang, Y.
-
Zeng, L.
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visa färre...
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Nuclear Fusion
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