ERO2.0 modelling of nanoscale surface morphology evolution

被引：8

作者：

Alberti, G. ^{[1
]}

Sala, M. ^{[1
]}

Romazanov, J. ^{[2
]}

Uccello, A. ^{[3
]}

Dellasega, D. ^{[1
]}

Passoni, M. ^{[1
,3
]}

机构：

[1] Politecn Milan, Dept Energy, I-20133 Milan, Italy

[2] Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Trilateral Euregio Cluster TEC, Julich, Germany

[3] CNR, Ist Sci & Tecnol Plasmi, I-20125 Milan, Italy

来源：

NUCLEAR FUSION | 2021年 / 61卷 / 06期

关键词：

ERO2; 0; morphology evolution; GyM; erosion; nanostructured tungsten; plasma facing components; linear plasma device; SELF-DIFFUSION; ANALYTICAL EXPRESSION; ELECTRIC-FIELD; PLASMA; EROSION; CRYSTAL; DEPOSITION; TUNGSTEN;

D O I：

10.1088/1741-4326/abfcde

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Plasma-material interaction (PMI) in tokamaks determines the life-time of first-wall (FW) components. Due to PMI, FW materials are eroded and transported within the device. Erosion is strongly influenced by the original morphology of the component, due to particle redeposition on near surface structures and to the changing of impact angle distributions, which results in an alteration of the sputtering effects. The Monte-Carlo impurity transport code ERO2.0 is capable of modelling the erosion of non-trivial surface morphologies due to plasma irradiation. The surface morphology module was validated against experimental data with satisfactory agreement. In this work, we further progress in the validation of the ERO2.0 capabilities by modelling both numerically generated surfaces as well as real surfaces, generated using atomic force microscopy (AFM) measurements of reference tungsten samples. The former are used to validate ERO2.0 against one of the morphology evolution models present in literature, in order to outline the conditions for reliable code solutions. Modifications induced in AFM-generated surfaces after argon and helium plasma irradiation are compared, showing a similar post-exposure morphology, mostly dominated by surface smoothing. Finally, the ERO2.0 morphology retrieved after He plasma exposure is compared to experimentally-available scanning electron microscopy and AFM measurements of the same surface morphology exposed in the linear plasma device GyM, showing the need for further improvements of the code, while a good agreement between experimental and simulated erosion rate is observed.

引用

页数：15

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