Study of plasma-surface interaction at the GOL-3 facility

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• 作者：A.A. Shoshin^a ; ^b ; ^{shoshin@mail.ru} ; A.S. Arakcheev^a ; ^b ; ^{asarakcheev@gmail.com} ; A.V. Arzhannikov^a ; ^b ; ^{A.V.Arzhannikov@inp.nsk.su} ; A.V. Burdakov^a ; ^c ; ^{a.v.burdakov@mail.ru} ; I.A. Ivanov^a ; ^b ; ^{I.A.Ivanov@inp.nsk.su} ; A.A. Kasatov^a ; ^{a.a.kasatov@gmail.com} ; K.N. Kuklin^a ; ^{K.N.Kuklin@inp.nsk.su} ; S.V. Polosatkin^a ; ^b ; ^{S.V.Polosatkin@inp.nsk.su} ; V.V. Postupaev^a ; ^b ; ^{V.V.Postupaev@inp.nsk.su} ; S.L. Sinitsky^a ; ^b ; ^{S.L.Sinitsky@inp.nsk.su} ; A.A. Vasilyev^b ; ^{alex.alex.vasilyev@gmail.com} ; L.N. Vyacheslavov^a ; ^{L.N.Vyacheslavov@inp.nsk.su}
• 关键词：Plasma-wall interaction ; First wall ; Plasma diagnostics ; Tungsten ; Graphite ; Pulsed plasma load ; Surface modification
• 刊名：Fusion Engineering and Design
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：114
• 期：Complete
• 页码：157-179
• 全文大小：14603 K
• 卷排序：114

文摘

The review presents experimental studies of plasma-surface interaction and materials behavior under plasma loads done in the multiple-mirror trap of the GOL-3 facility. In the experiments for the PSI, the energy density in the extracted plasma stream varies from 0.5 to 30 MJ/m2. Parameters of near-surface plasma measured by a set of diagnostics are reviewed. Surface patterns of targets exposed to the plasma are analyzed. The erosion depth depends on the energy loads—it rises from 0 to 600 μm at 0.5 and 30 MJ/m2, correspondingly. Cracking and evolution of graphite and tungsten surface morphology are discussed. The enthalpy of brittle destruction of graphite (10 kJ/g), which determines the threshold of bulk damage of targets irradiated with a charged-particle flux with large penetration depth, was determined. Comparison of different facilities for PSI studies are presented. Heat flux play a key role to the target surface erosion.