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Magnetized electron emission from a small spherical dust grain in fusion related plasmas

Autricque, Adrien and Fedorczak, N. and Khrapak, Sergey and Couedel, L. and Klumov, Boris and Arnas, Cecile and Ning, Ning and Layet, Jean-Marc and Grisolia, C. (2017) Magnetized electron emission from a small spherical dust grain in fusion related plasmas. Physics of Plasmas, 24, p. 124502. American Institute of Physics (AIP). DOI: 10.1063/1.4997695 ISSN 1070-664X

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Abstract

The effect of magnetic field on the electron emission yield from a small spherical dust grain immersed in a plasma is investigated. It is demonstrated that, due to their gyromotion, some electrons can be promptly recollected on the grain’s surface, which can reduce the emitted electron flux. The consequences are discussed mainly in the context of fusion-related applications, where the dust floating potential can be significantly reduced when positive while the dust lifetime remains weakly affected. In particular, we suggest that this effect should be included in the codes used to model the dust transport in tokamaks.

Item URL in elib:https://elib.dlr.de/117981/
Document Type:Article
Title:Magnetized electron emission from a small spherical dust grain in fusion related plasmas
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Autricque, AdrienCEA, IRFM, FranceUNSPECIFIED
Fedorczak, N.CEA, IRFM, FranceUNSPECIFIED
Khrapak, SergeyDLR, Sergey.Khrapak (at) dlr.deUNSPECIFIED
Couedel, L.CNRS, Aix-Marseille UniversiteUNSPECIFIED
Klumov, Borisaix-marseille-universityUNSPECIFIED
Arnas, CecileCNRS, Aix-Marseille UniversiteUNSPECIFIED
Ning, NingAix-Marseille-UniversityUNSPECIFIED
Layet, Jean-MarcCNRS, Aix-Marseille UniversiteUNSPECIFIED
Grisolia, C.CEA, IRFM, FranceUNSPECIFIED
Date:6 December 2017
Journal or Publication Title:Physics of Plasmas
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:24
DOI :10.1063/1.4997695
Page Range:p. 124502
Publisher:American Institute of Physics (AIP)
ISSN:1070-664X
Status:Published
Keywords:complex (dusty) plasmas, particle-plasma interactions, particle charging, fusion-related plasma, electron emission from small particles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Theory, Simulation
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Materials Physics in Space > Research Group Complex Plasma
Deposited By: Khrapak, Sergey
Deposited On:16 Jan 2018 15:27
Last Modified:06 Sep 2019 15:18

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