Publication: Deuterium Retention in a Nanostructured Tungsten Surface Layer Formed during High-Temperature Irradiation with Helium Plasma
Дата
2020
Авторы
Harutyunyan, Z. R.
Ogorodnikova, O. V.
Aksenova, A. S.
Gasparyan, Y. M.
Efimov, V. S.
Kharkov, M. M.
Kaziev, A. V.
Volkov, N. V.
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Аннотация
The preliminary irradiation of a tungsten sample with low-energy helium ions (80 eV, flux of 10(21) m(-2) s(-1)) at a temperature of 1200-1250 K in a facility with an inductive RF discharge leads to the formation of a nanostructured tungsten surface layer, which is referred to as fuzz. After that, the sample is subjected to a set of annealing procedures and irradiations with ions with an energy of 2 keV (0.67 keV per D) at low fluences of 10(19)-10(20) m(-2). Deuterium retention at each stage is analyzed by in-situ thermal desorption spectroscopy. An increase in the helium concentration in the sample leads to a significant change of deuterium retention. At high helium concentrations, deuterium retention becomes low. Annealing in the temperature range of 1000-1400 K leads to helium desorption, modification of the surface layer and defects, and, as a consequence, an increase in the amplitude of the main deuterium desorption peak and a shift of the peak to higher temperatures. Annealing at a temperature of 1600 K leads to removal of the nanostructured fuzz from the tungsten surface and a decrease in the deuterium retention on account of an increase in the reflection coefficient from a smoother surface.
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Deuterium Retention in a Nanostructured Tungsten Surface Layer Formed during High-Temperature Irradiation with Helium Plasma / Harutyunyan, ZR [et al.] // Journal of Surface Investigation. - 2020. - 14. - № 6. - P. 1248-1253. - 10.1134/S1027451020060245
URI
https://www.doi.org/10.1134/S1027451020060245
https://www.scopus.com/record/display.uri?eid=2-s2.0-85098252380&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000603321400022
https://openrepository.mephi.ru/handle/123456789/23056
https://www.scopus.com/record/display.uri?eid=2-s2.0-85098252380&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000603321400022
https://openrepository.mephi.ru/handle/123456789/23056