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On secondary electron emission and its semi-empirical description
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.ORCID iD: 0000-0001-9632-8104
2014 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 56, no 12, 123002- p.Article, review/survey (Refereed) Published
Abstract [en]

The description of secondary electron emission, as presented by plasma-material interaction fusion compendia, is demonstrated to be outdated both in its theoretical and experimental aspects. As a consequence, the recommended treatment leads to a strong overestimation of the secondary electron emission yields for tokamak relevant materials. Reliable experimental data-sets, in fusion energy ranges, are identified after a detailed review of a recently updated electron-solid interaction database and previously published experimental results. A novel semi-empirical approach is proposed for the description of the secondary electron emission yield. Application of the approach for a large number of solids reveals an unprecedented agreement with experimental data. The present results can serve as a reliable input for future quantitative investigations of the effect of secondary electron emission on various aspects of scrape-off-layer physics.

Place, publisher, year, edition, pages
2014. Vol. 56, no 12, 123002- p.
Keyword [en]
secondary electron emission, scrape-off layer, electron backscattering
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-159390DOI: 10.1088/0741-3335/56/12/123002ISI: 000346926300004Scopus ID: 2-s2.0-84912003199OAI: oai:DiVA.org:kth-159390DiVA: diva2:784638
Note

QC 20150130

Available from: 2015-01-30 Created: 2015-01-29 Last updated: 2017-12-05Bibliographically approved

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Tolias, Panagiotis

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