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Sökning: id:"swepub:oai:DiVA.org:kth-12481" > Overview of JET res...

  • Pamela, J. (författare)

Overview of JET results

  • Artikel/kapitelEngelska2003

Förlag, utgivningsår, omfång ...

  • 2003-12-02
  • IOP Publishing,2003
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-12481
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12481URI
  • https://doi.org/10.1088/0029-5515/43/12/002DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Artikeln har flera hundra författare. Enbart de två första och samtliga KTH-författare registrerade.
  • Scientific and technical activities on JET focus on the issues likely to affect the ITER design and operation. Our understanding of the ITER reference mode of operation, the ELMy H-mode, has progressed significantly. The extrapolation of ELM size to ITER has been re-evaluated. Neoclassical tearing modes have been shown to be meta-stable in JET, and their beta limits can be raised by destabilization (modification) of sawteeth by ion cyclotron radio frequency heating (ICRH). Alpha simulation experiments with ICRH accelerated injected 4 (He) beam ions provide a new tool for fast particle and magnetohydrodynamic studies, with up to 80-90% of plasma heating by fast 4 He ions. With or without impurity seeding, a quasi-steady-state high confinement (H-98 = 1), high density(n(e)/n(GW) = 0.9-1) and high beta (betaN = 2) ELMy H-mode has been achieved by operating near the ITER triangularity ( similar to 0.40-0.5) and safety factor (q(95) similar to 3), at Z(eff) similar to 1.5-2. In advanced tokamak (AT) scenarios, internal transport barriers (ITBs) are now characterized in real time with a new criterion, rhoT(*). Tailoring of the current profile with T lower hybrid current drive provides reliable access to a variety of q profiles, lowering access power for barrier formation. Rational q surfaces appear to be associated with ITB formation. Alfven cascades were observed in reversed shear plasmas, providing identification of q profile evolution. Plasmas with 'current holes' were observed and modelled. Transient high confinement AT regimes with H-89 = 3.3, beta(N) = 2.4 and ITER-relevant q < 5 were achieved with reversed magnetic shear. Quasi-stationary ITBs are developed with full non-inductive current drive, including similar to 50% bootstrap current. A record duration of ITBs was achieved, up to 11 s, approaching the resistive time. For the first time, pressure and current profiles of AT regimes are controlled by a real-time feedback system, in separate experiments. Erosion and co-deposition studies with a quartz micro-balance show reduced co-deposition. Measured divertor thermal loads during disruptions in JET could modify ITER assumptions.

Ämnesord och genrebeteckningar

  • elmy h-modes internal transport barriers joint european torus current drive interaction issues tritium recovery plasma rotation high-density confinement shear

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Solano, E.R. (författare)
  • Brzozowski, JerzyKTH,Alfvénlaboratoriet (författare)
  • Hellsten, TorbjörnKTH,Alfvénlaboratoriet(Swepub:kth)u16w7v9f (författare)
  • Laxåback, MartinKTH,Alfvénlaboratoriet(Swepub:kth)u1oieq86 (författare)
  • Rachlew, ElisabethKTH,Fysik(Swepub:kth)u12i3o9i (författare)
  • Rubel, MarekKTH,Alfvénlaboratoriet(Swepub:kth)u1vrej8y (författare)
  • KTHAlfvénlaboratoriet (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Nuclear Fusion: IOP Publishing43:12, s. 1540-15540029-55151741-4326

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