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Analytical model of particle and heat flux collection by dust immersed in dense magnetized plasmas
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0001-7796-1887
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0002-6712-3625
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0001-9632-8104
2017 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 59, no 10, article id 104002Article in journal (Refereed) Published
Abstract [en]

A comprehensive analytical description is presented for the particle and heat fluxes collected by dust in dense magnetized plasmas. Compared to the widely used orbital motion limited theory, the suppression of cross-field transport leads to a strong reduction of the electron fluxes, while ion collection is inhibited by thin-sheath effects and the formation of a potential overshoot along the field lines. As a result, the incoming heat flux loses its sensitivity to the floating potential, thereby diminishing the importance of electron emission processes in dust survivability. Numerical simulations implementing the new model for ITER-like detached divertor plasmas predict a drastic enhancement of the dust lifetime.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2017. Vol. 59, no 10, article id 104002
Keywords [en]
dust, droplets, dust heating, magnetized electron collection, thin-sheath ions
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-213756DOI: 10.1088/1361-6587/aa7c44ISI: 000407750200001Scopus ID: 2-s2.0-85029917782OAI: oai:DiVA.org:kth-213756DiVA, id: diva2:1140242
Note

QC 20170911

Available from: 2017-09-11 Created: 2017-09-11 Last updated: 2017-09-11Bibliographically approved

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Vignitchouk, LadislasRatynskaia, Svetlana V.Tolias, Panagiotis

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