Tungsten coatings for application in WEST project

被引：7

作者：

Grigore, E. ^{[1
]}

Gherendi, M. ^{[1
]}

Hernandez, C. ^{[2
]}

Desgranges, C. ^{[2
]}

Firdaouss, M. ^{[2
]}

机构：

[1] Natl Inst Lasers Plasma & Radiat Phys, Bucharest, Romania

[2] IRFM CEA Cadarache, F-13108 St Paul Les Durance, France

来源：

NUCLEAR MATERIALS AND ENERGY | 2016年 / 9卷

关键词：

W coatings; High heat flux test; WEST project; ITER divertor; ION-IMPLANTATION;

D O I：

10.1016/j.nme.2016.09.003

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The WEST (Tungsten Environment in Steady-state Tokamak) project is aimed to implement and test the ITER W divertor technology in relevant plasma operation conditions. In addition to the ITER-like W monoblock divertor target, the WEST project involves W coated CuCrZr target and W coated Fine Grain Graphite (FGG) and CFC-N11 (Carbon Fiber Composite) tiles. Combined Magnetron Sputtering and Ion Implantation (CMSII) technology was developed and applied in the framework of ITER-like wall (ILW) project at JET for W coating of CFC Dunlop 780 DMS tiles Ruset et al. (2007) [1]. The coating thickness was in the range of 10-25 mu m depending on the position of the tiles in the wall. The same technology was also used for W coating of more than 1300 FGG tiles for ASDEX Upgrade tokamak. In the present paper W coatings of 12.8 mu m and 20 mu m deposited on PFC (Plasma Facing Components) materials used in WEST project will be analyzed. As substrate materials CFC N11, FGG samples were used. These substrate materials have different properties compared to materials used for ILW project. GDOES (Glow Discharge Optical Emission Spectrometry) and XRD (X-Ray Diffraction) measurements were used for assessment of chemical composition and structure of the coatings. The behavior of the coatings to the High Heat Flux tests (HHFT) has been investigated by using an electron beam test facility. The testing program consisted of similar to 300 pulses with duration of 420 s each. The surface temperature during the tests was 1200 degrees C whereas the power density was about 3.5 MW/m(2). (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：137 / 140

页数：4

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