Ion Microbeam Analyses of Dust Particles and Codeposits from JET with the ITER-Like Wall

被引：14
|
作者：
Fazinic, Stjepko [1 ]
Tadic, Tonic [1 ]
Vuksic, Marin [1 ]
Rubel, Marek [2 ]
Petersson, Per [2 ]
Fortuna-Zalesna, Elibieta [3 ]
Widdowson, Anna [4 ]
机构：
[1] Rudjer Boskovic Inst, Bijenicka 54, Zagreb 10000, Croatia
[2] Royal Inst Technol KTH, Sch Elect Engn, Dept Fus Plasma Phys, Teknikringen 31, S-10044 Stockholm, Sweden
[3] Warsaw Univ Technol, Fac Mat Sci & Technol, Woloska 141, PL-02507 Warsaw, Poland
[4] Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England
来源：
ANALYTICAL CHEMISTRY | 2018年 / 90卷 / 09期
关键词：
DIFFERENTIAL CROSS SECTIONS; NUCLEAR-REACTION; DEPOSITED LAYERS; DEUTERIUM; FUEL; ENERGY; PROBE;
D O I：
10.1021/acs.analchem.8b00073
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Generation of metal dust in the JET tokamak with the ITER-like wall (ILW) is a topic of vital interest to next-step fusion devices because of safety issues with plasma operation. Simultaneous Nuclear Reaction Analysis (NRA) and Particle Induced X-ray Emission (PIXE) with a focused four MeV He-3 microbeam was used to determine the composition of dust particles related to the JET operation with the ILW. The focus was on "Be-rich particles" collected from the deposition zone on the inner divertor tile. The particles found are composed of a mix of codeposited species up to 120 m in size with a thickness of 30-40 mu m, The main constituents are D from the fusion fuel, Be and W from the main plasma-facing components, and Ni and Cr from the Inconel grills of the antennas for auxiliary plasma heating. Elemental concentrations were estimated by iterative NRA-PIXE analysis. Two types of dust particles were found: (i) larger Be-rich particles with Be concentrations above 90 at% with a deuterium presence of up to 3.4 at% and containing Ni (1-3 at%), Cr (0.4-0.8 at%), W (0.2-0.9 at%), Fe (0.3-0.6 at%), and Cu and Ti in lower concentrations and (ii) small particles rich in Al and/or Si that were in some cases accompanied by other elements, such as Fe, Cu, or Ti or W and Mo.
引用
收藏
页码：5744 / 5752
页数：9
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