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ELM-induced cold pulse propagation in ASDEX Upgrade
Max Planck Inst Plasma Phys, D-85748 Garching, Germany..
KTH, Skolan för elektroteknik och datavetenskap (EECS), Fusionsplasmafysik.ORCID-id: 0000-0002-9546-4494
KTH, Skolan för elektroteknik och datavetenskap (EECS), Fusionsplasmafysik.ORCID-id: 0000-0002-6554-9681
KTH, Skolan för elektroteknik och datavetenskap (EECS), Fusionsplasmafysik.ORCID-id: 0000-0001-5603-8559
Vise andre og tillknytning
2019 (engelsk)Inngår i: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 61, nr 4, artikkel-id 045003Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron cyclotron emission measurements, in a dataset of plasmas with moderate triangularity. It is found that the edge safety factor or the plasma current are the main determining parameters for the inward penetration of the T-e perturbations. With increasing plasma current the ELM penetration is more shallow in spite of the stronger ELMs. Estimates of the heat pulse diffusivity show that the corresponding transport is too large to be representative of the inter-ELM phase. Ergodization of the plasma edge during ELMs is a possible explanation for the observed properties of the cold pulse propagation, which is qualitatively consistent with non-linear magneto-hydro-dynamic simulations.

sted, utgiver, år, opplag, sider
IOP PUBLISHING LTD , 2019. Vol. 61, nr 4, artikkel-id 045003
Emneord [en]
ELMs, MHD instabilities, stochastic field, magnetic islands, cold pulse
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-245121DOI: 10.1088/1361-6587/aaf9c3ISI: 000458986000002OAI: oai:DiVA.org:kth-245121DiVA, id: diva2:1296557
Merknad

QC 20190315

Tilgjengelig fra: 2019-03-15 Laget: 2019-03-15 Sist oppdatert: 2019-05-20bibliografisk kontrollert

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Frassinetti, LorenzoFridström, RichardGarcia Carrasco, AlvaroHellsten, TorbjörnJohnson, ThomasPetersson, PerRatynskaia, Svetlana V.Tolias, PanagiotisVallejos, PabloVignitchouk, Ladislas

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Frassinetti, LorenzoFridström, RichardGarcia Carrasco, AlvaroHellsten, TorbjörnJohnson, ThomasPetersson, PerRatynskaia, Svetlana V.Tolias, PanagiotisVallejos, PabloVignitchouk, Ladislas
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