Micron-sized dust and nanoparticles produced in the WEST tokamak

被引：11

作者：

Arnas, C. ^{[1
]}

Campos, A. ^{[2
]}

Diez, M. ^{[3
]}

Peillon, S. ^{[4
]}

Martin, C.

Hassouni, K. ^{[5
]}

Michau, A. ^{[5
]}

Bernard, E. ^{[3
]}

Fedorczac, N. ^{[3
]}

Gensdarmes, F. ^{[4
]}

Grisolia, C. ^{[3
]}

Pegourie, B. ^{[3
]}

Tsitrone, E.

机构：

[1] Aix Marseille Univ, CNRS, PIIM, F-13397 Marseille, France

[2] Aix Marseille Univ, CNRS, Cent Marseille, FSCM,CP2M, F-13397 Marseille, France

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

[4] LPMA IRSN, F-91192 Gif Sur Yvette, France

[5] Univ Paris 13, Sorbonne Paris Cite, CNRS, LSPM, F-93430 Villetaneuse, France

来源：

NUCLEAR MATERIALS AND ENERGY | 2023年 / 36卷

关键词：

WEST; Tokamak dust; W nanoparticle; He nanobubble; STEADY-STATE; LOW-ENERGY; TUNGSTEN; MICROSTRUCTURE; PARTICLES; COMPONENT;

D O I：

10.1016/j.nme.2023.101471

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：

Two populations of dust particles were found during the first phase of operation of WEST. The one that dominates by size and weight comes from the delamination of tungsten coatings covering graphite tiles and the emission of droplets of molten materials during off-normal events. Sizes vary from several microns to tens of microns. More generally, micron-sized dust particles due to the erosion of all materials present in the vacuum vessel were collected. In addition, nanocavities were found at the surface of tungsten dust sampled after He plasmas and were attributed to He trapping in the form of nanobubbles. Tungsten nanoparticles constitute the second unexpected dust population. They are dominant by their number and were essentially found at the surface of micron-sized particles. They may result either from the condensation of an oversaturated vapor above molten tungsten or come from ion-neutral clusters growing in plasma regions of low temperature until the appearance of solid particles.

引用

页数：8

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