Preparation of erosion and deposition investigations on plasma facing components in Wendelstein 7-X

被引：12

作者：

Dhard, C. P. ^{[1
]}

Balden, M. ^{[2
]}

Braeuer, T. ^{[1
]}

Brezinsek, S. ^{[3
]}

Coenen, J. W. ^{[3
]}

Dudek, A. ^{[1
]}

Ehrke, G. ^{[1
]}

Hathiramani, D. ^{[1
]}

Klose, S. ^{[1
]}

Koenig, R. ^{[1
]}

Laux, M. ^{[1
]}

Linsmeier, Ch ^{[3
]}

Manhard, A. ^{[2
]}

Masuzaki, S. ^{[4
]}

Mayer, M. ^{[2
]}

Motojima, G. ^{[4
]}

Naujoks, D. ^{[1
]}

Neu, R. ^{[2
,6
]}

Neubauer, O. ^{[3
]}

Rack, M. ^{[3
]}

Ruset, C. ^{[5
]}

Schwarz-Selinger, T. ^{[2
]}

Pedersen, T. Sunn ^{[1
,7
]}

Tokitani, M. ^{[4
]}

Unterberg, B. ^{[3
]}

Yajima, M. ^{[4
]}

机构：

[1] Max Planck Inst Plasma Phys, Wendelsteinstr 1, D-17491 Greifswald, Germany

[2] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[3] Forschungszentrum Julich GmbH, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Julich, Germany

[4] Natl Inst Fus Sci, 322-6 Oroshi, Toki, Gifu 5095292, Japan

[5] Natl Inst Laser Plasma & Radiat Phys, Magurele 077125, Romania

[6] Tech Univ Munich, Boltzmannstr 15, D-85748 Garching, Germany

[7] Ernst Moritz Arndt Univ Greifswald, Domstr 11, D-17489 Greifswald, Germany

来源：

PHYSICA SCRIPTA | 2017年 / T170卷

关键词：

Wendelstein; 7-X; plasma facing components; plasma wall interaction; erosion and deposition; LAYER FORMATION; ASDEX UPGRADE; DIVERTOR;

D O I：

10.1088/1402-4896/aa86fb

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the Wendelstein 7-X stellarator with its twisted magnetic geometry the investigation of plasma wall interaction processes in 3D plasma configurations is an important research subject. For the upcoming operation phase i.e. OP1.2, three different types of material probes have been installed within the plasma vessel for the erosion/deposition investigations in selected areas with largely different expected heat load levels, namely,. 10MWm(-2) at the test divertor units (TDU),. 500 kW m(-2) at the baffles, heat shields and toroidal closures and. 100 kW m(-2) at the stainless steel wall panels. These include 18 exchangeable target elements at TDU, about 30 000 screw heads at graphite tiles and 44 wafer probes on wall panels, coated with marker layers. The layer thicknesses, surface morphologies and the impurity contents were pre-characterized by different techniques and subjected to various qualification tests. The positions of these probes were fixed based on the strike line locations on the divertor predicted by field line diffusion and EMC3/EIRENE modeling calculations for the OP1.2 plasma configurations and availability of locations on panels in direct view of the plasma. After the first half of the operation phase i.e. OP1.2a the probes will be removed to determine the erosion/deposition pattern by post-mortem analysis and replaced by a new set for the second half of the operation phase, OP1.2b.

引用

页数：6

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