This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2007/T128/016 in citations.
Experience with Bulk Tungsten Test-Limiters Under Plasma Bondary Fluxes: Melting and Melt Layer Propagation
Experience with Bulk Tungsten Test-Limiters Under Plasma Bondary Fluxes: Melting and Melt Layer Propagation
The paper provides an overview of processes and underlying physics governing tungsten melt erosion in the fusion plasma environment. Experiments with three different bulk tungsten test-limiters were performed in TEXTOR: (i) thermally insulated solid plate fixed on a graphite roof-like limiter heated...
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Personal Name(s): | Sergienko, G. |
---|---|
Bazylev, B. / Hirai, T. / Huber, A. / Kreter, A. / Nedospasov, A. / Rubel, M. / Philipps, V. / Pospieszczyk, A. / Samm, U. / Schweer, B. / Tokar, M. | |
Contributing Institute: |
Werkstoffstruktur und Eigenschaften; IEF-2 JARA-ENERGY; JARA-ENERGY Plasmaphysik; IEF-4 |
Published in: | Physica scripta, T128 (2007) S. 81 - 86 |
Imprint: |
Bristol
IoP Publ.
2007
|
Physical Description: |
81 - 86 |
DOI: |
10.1088/0031-8949/2007/T128/016 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Physica Scripta
T128 |
Subject (ZB): | |
Publikationsportal JuSER |
The paper provides an overview of processes and underlying physics governing tungsten melt erosion in the fusion plasma environment. Experiments with three different bulk tungsten test-limiters were performed in TEXTOR: (i) thermally insulated solid plate fixed on a graphite roof-like limiter heated up by the plasma to the melting point, (ii) macro-brush of the ITER-relevant castellated structure and (iii) lamellae structure developed for the JET divertor. The main objectives were to determine the metal surface damage, the formation of the melt layer and its motion in the magnetic field. PHEMOBRID-3D and MEMOS-1.5D numerical codes were used to simulate the experiment with the roof-like test-limiter. Both experiments and simulation showed that the melting of tungsten can lead to a large material redistribution due to thermo-electron emission currents without ejection of molten material to the plasma. |