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Overview of progress in European medium sized tokamaks towards an integrated plasma-edge/wall solution
Vise andre og tillknytning
2017 (engelsk)Inngår i: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 57, nr 10, artikkel-id 102014Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Integrating the plasma core performance with an edge and scrape-off layer (SOL) that leads to tolerable heat and particle loads on the wall is a major challenge. The new European medium size tokamak task force (EU-MST) coordinates research on ASDEX Upgrade (AUG), MAST and TCV. This multi-machine approach within EU-MST, covering a wide parameter range, is instrumental to progress in the field, as ITER and DEMO core/pedestal and SOL parameters are not achievable simultaneously in present day devices. A two prong approach is adopted. On the one hand, scenarios with tolerable transient heat and particle loads, including active edge localised mode (ELM) control are developed. On the other hand, divertor solutions including advanced magnetic configurations are studied. Considerable progress has been made on both approaches, in particular in the fields of: ELM control with resonant magnetic perturbations (RMP), small ELM regimes, detachment onset and control, as well as filamentary scrape-off-layer transport. For example full ELM suppression has now been achieved on AUG at low collisionality with n = 2 RMP maintaining good confinement H-H(98,H-y2) approximate to 0.95. Advances have been made with respect to detachment onset and control. Studies in advanced divertor configurations (Snowflake, Super-X and X-point target divertor) shed new light on SOL physics. Cross field filamentary transport has been characterised in a wide parameter regime on AUG, MAST and TCV progressing the theoretical and experimental understanding crucial for predicting first wall loads in ITER and DEMO. Conditions in the SOL also play a crucial role for ELM stability and access to small ELM regimes.

sted, utgiver, år, opplag, sider
Institute of Physics Publishing (IOPP), 2017. Vol. 57, nr 10, artikkel-id 102014
Emneord [en]
edge localised modes, divertor, heat loads, ASDEX upgrade, MAST, TCV, alternative divertor concepts
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Identifikatorer
URN: urn:nbn:se:kth:diva-211307DOI: 10.1088/1741-4326/aa6084ISI: 000404620600003Scopus ID: 2-s2.0-85028471890OAI: oai:DiVA.org:kth-211307DiVA, id: diva2:1129361
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QC 20170802

Tilgjengelig fra: 2017-08-02 Laget: 2017-08-02 Sist oppdatert: 2018-09-19bibliografisk kontrollert

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Frassinetti, LorenzoGarcia-Carrasco, AlvaroHellsten, TorbjörnJonsson, ThomasPetersson, PerRatynskaia, SvetlanaTolias, PanagiotisVallejos, Pablo
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