Microstructural characterization of mixed-material deposition layer on the LHD divertor tiles by using nano-geological diagnosis

被引：16

作者：

Tokitani, M. ^{[1
]}

Masuzaki, S. ^{[1
]}

Yoshida, N. ^{[2
]}

Sagara, A. ^{[1
]}

Noda, N. ^{[1
]}

Yamada, H. ^{[1
]}

机构：

[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[2] Kyushu Univ, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷

基金：

日本学术振兴会;

关键词：

LARGE HELICAL DEVICE; OPERATION; ENERGY;

D O I：

10.1016/j.jnucmat.2013.01.177

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fusion plasma research crucially needs to understand the characteristics of the deposition layer that forms in the vacuum vessel because of the migration of plasma-facing materials. Such a deposition layer can accumulate on the fuel particles on account of a co-deposition process and can be a source of dust in the plasma. In this study, nano-geological diagnosis which uses a focused ion beam (FIB) fabrication technique and transmission electron microscope (TEM) observations, has been applied to the mixed-material deposition layer formed in a large helical device (LHD). A cross-sectional view of the deposition layer with nanometer resolution was successfully observed. The total thickness of the layer was estimated at similar to 8 mu m, and it has very fine and stratified layer structures in the nanometer level. The characteristics of each layer are indicative of the operational history of the LHD and the mechanism of dust formation by layer flaking. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：S818 / S821

页数：4