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Dust-wall and dust-plasma interaction in the MIGRAINe code
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-7796-1887
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-9632-8104
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-6712-3625
2014 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 56, no 9, 095005- p.Article in journal (Refereed) Published
Abstract [en]

The physical models implemented in the recently developed dust dynamics code MIGRAINe are described. A major update of the treatment of secondary electron emission, stemming from models adapted to typical scrape-off layer temperatures, is reported. Sputtering and plasma species backscattering are introduced from fits of available experimental data and their relative importance to dust charging and heating is assessed in fusion-relevant scenarios. Moreover, the description of collisions between dust particles and plasma-facing components, based on the approximation of elastic-perfectly plastic adhesive spheres, has been upgraded to take into account the effects of particle size and temperature.

Place, publisher, year, edition, pages
2014. Vol. 56, no 9, 095005- p.
Keyword [en]
dust, MIGRAINe, dust-wall interaction, dust-wall collisions, transport
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-153857DOI: 10.1088/0741-3335/56/9/095005ISI: 000341854100015Scopus ID: 2-s2.0-84906569539OAI: oai:DiVA.org:kth-153857DiVA: diva2:754497
Note

QC 20141010

Available from: 2014-10-10 Created: 2014-10-09 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Modelling the multifaceted physics of metallic dust and droplets in fusion plasmas
Open this publication in new window or tab >>Modelling the multifaceted physics of metallic dust and droplets in fusion plasmas
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Plasma-material interaction constitutes one of the major scientific and technological issues affecting the development of thermonuclear fusion power plants. In particular, the release of metallic dust and droplets from plasmafacing components is a crucial aspect of reactor operation. By penetrating into the burning plasma, these micrometric particles act as a source of impurities which tend to radiate away the plasma energy, cooling it down below the threshold temperatures for sustainable fusion reactions. By accumulating in the reactor chamber, dust particles tend to retain fuel elements, lowering the reactor efficiency and increasing its radioactivity content. Dust accumulation also increases the risk of explosive hydrogen production upon accidental air or water ingress in the vacuum chamber. Numerical dust transport codes provide the essential framework to guide theoretical and experimental dust studies by simulating the intricate couplings between the many physical processes driving dust dynamics in fusion plasmas. This thesis reports on the development and validation of the MIGRAINe code, which specifically targets plasma-surface interaction processes and the physics of dust particles impinging on plasma-facing components to address long-term dust migration and accumulation in fusion devices.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2016. 80 p.
Series
TRITA-EE, ISSN 1653-5146 ; 2016:084
National Category
Fusion, Plasma and Space Physics
Research subject
Electrical Engineering
Identifiers
urn:nbn:se:kth:diva-187638 (URN)978-91-7729-041-4 (ISBN)
Public defence
2016-06-13, E3, Osquars backe 14, Stockholm, 13:30 (English)
Opponent
Supervisors
Note

QC 20160525

Available from: 2016-05-25 Created: 2016-05-25 Last updated: 2016-05-26Bibliographically approved

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Vignitchouk, LadislasTolias, PanagiotisRatynskaia, Svetlana

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