Sökning: onr:"swepub:oai:research.chalmers.se:22b83015-27a8-46e3-b236-f3614f8d9f9b" >
Influence of massiv...
-
Hesslow, Linnea,1993Chalmers tekniska högskola,Chalmers University of Technology
(författare)
Influence of massive material injection on avalanche runaway generation during tokamak disruptions
- Artikel/kapitelEngelska2019
Förlag, utgivningsår, omfång ...
-
2019-06-26
-
IOP Publishing,2019
Nummerbeteckningar
-
LIBRIS-ID:oai:research.chalmers.se:22b83015-27a8-46e3-b236-f3614f8d9f9b
-
https://research.chalmers.se/publication/512941URI
-
https://research.chalmers.se/publication/511218URI
-
https://doi.org/10.1088/1741-4326/ab26c2DOI
-
https://research.chalmers.se/publication/511216URI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:art swepub-publicationtype
-
Ämneskategori:ref swepub-contenttype
Anmärkningar
-
In high-current tokamak devices such as ITER, a runaway avalanche can cause a large amplification of a seed electron population. We show that disruption mitigation by impurity injection may significantly increase the runaway avalanche growth rate in such devices. This effect originates from the increased number of target electrons available for the avalanche process in weakly ionized plasmas, which is only partially compensated by the increased friction force on fast electrons. We derive an expression for the avalanche growth rate in partially ionized plasmas and investigate the effects of impurity injection on the avalanche multiplication factor and on the final runaway current for ITER-like parameters. For impurity densities relevant for disruption mitigation, the maximum amplification of a runaway seed can be increased by tens of orders of magnitude compared to previous predictions. This motivates careful studies to determine the required densities and impurity species to obtain tolerable current quench parameters, as well as more detailed modeling of the runaway dynamics including transport effects.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Embréus, Ola,1991Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)embreus
(författare)
-
Vallhagen, Oskar,1997Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)vaoskar
(författare)
-
Fülöp, Tünde,1970Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)tunde
(författare)
-
Chalmers tekniska högskola
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Nuclear Fusion: IOP Publishing59:81741-43260029-5515
Internetlänk
Hitta via bibliotek
Till lärosätets databas