Modeling of the first mirror surface composition under ITER relevant particle irradiation . Journal of Nuclear Materials Volume 438, Issue SUPPL, 2013, Pages S731-S734
14 сентября 2018
254
Предметная область | — |
Выходные данные | — |
Ключевые слова | — |
Вид публикации | Статья |
Контактные данные автора публикации | Kogut, D.K. , Trifonov, N.N., Kurnaev, V.A. National Research Nuclear University MEPhI |
Ссылка на публикацию в интернете | www.scopus.com/record/display.url?origin=recordpage&eid=2-s2.0-84885474634&citeCnt=3&noHighlight=false&sort=plf-f&src=s&st1=MEPhI&nlo=&nlr=&nls=&sid=F0743CC1BB1CEC168410A18CB87C48A7.Vdktg6RVtMfaQJ4pNTCQ:6500&sot=b&sdt=b&sl=31&s=AFFIL(MEPhI) AND PU |
Аннотация
Metal mirrors are widely used for optical diagnostics in ITER. Degradation of the mirror surface due to erosion and impurity deposition leads to deterioration of its reflecting properties. In the paper the transport of impurities in a cylindrical steel duct and surface composition change of a diagnostic molybdenum mirror irradiated simultaneously with D, He and Be atoms is simulated for the outer equatorial port of ITER. Net-deposition of Be and Fe on the mirror surface is found even for small Be fraction in the incident flux. The main reason is the formation of a mixed layer due to the high-energy CX-neutrals. However, using the protective duct with the aspect ratio L/D= 10 leads to 14,000 times reduction of Be flux to the mirror compared to Be flux to the first wall; this characteristic factor is sufficiently lower in the cases of L/D= 5 and 2. © 2013 Elsevier B.V. All rights reserved.
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Indexed keywords
Characteristic factors; Impurities in; Incident flux; ITER-relevant; Metal mirror; Mirror surfaces; Optical diagnostics; Particle irradiation
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Indexed keywords
Characteristic factors; Impurities in; Incident flux; ITER-relevant; Metal mirror; Mirror surfaces; Optical diagnostics; Particle irradiation
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