Plasma exposure of different tungsten grades with plasma accelerators under ITER-relevant conditions

被引：16

作者：

Makhlaj, Vadym A. ^{[1
]}

Garkusha, Igor E. ^{[1
]}

Aksenov, Nikolay N. ^{[1
]}

Bazylev, Boris ^{[2
]}

Byrka, Oleg V. ^{[1
]}

Landman, Igor ^{[2
]}

Linke, Jochen ^{[3
]}

Malykhin, Sergey V. ^{[4
]}

Pugachov, Anatoliy T. ^{[4
]}

Sadowski, Marek J. ^{[5
]}

Skladnik-Sadowska, Elzbieta ^{[5
]}

Wirtz, Marius ^{[3
]}

机构：

[1] NSC Kharkov Inst Phys & Technol, Inst Plasma Phys, Kharkov, Ukraine

[2] Karlsruhe Inst Technol, IHM, D-76344 Karlsruhe, Germany

[3] Forschungszentrum Julich, IEF 2, D-52425 Julich, Germany

[4] Natl Tech Univ, Kharkov Polytech Inst, UA-61002 Kharkov, Ukraine

[5] Natl Ctr Nucl Res NCBJ, PL-05400 Otwock, Poland

来源：

PHYSICA SCRIPTA | 2014年 / T161卷

关键词：

tungsten; ITER edge-localized modes (ELMs); plasma-surface interaction; transient high heat load; QSPA;

D O I：

10.1088/0031-8949/2014/T161/014040

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This paper presents the results of tungsten irradiation experiments performed with three plasma facilities: the QSPA Kh-50 quasi-steady-state plasma accelerator, the PPA pulsed plasma gun and the magneto-plasma compressor. Targets made of different kinds of tungsten (sintered, rolled and deformed) were irradiated with powerful plasma streams at heat fluxes relevant to edge-localized modes in ITER. The irradiated targets were analyzed and two different meshes of cracks were identified. It has been shown that the major cracks do not depend on the tungsten grade. This has been attributed to ductile-to-brittle transition effects. Meshes of inter-granular micro-cracks were detected for energy loads above the melting threshold and these were probably caused by the re-solidification process. The blister-like and cellular-like structures were observed on sample surfaces exposed to helium and hydrogen plasmas.

引用

页数：4

共 7 条

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