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Título : raw data of Comparative study of different Sn wetted W CPSs exposed to NBI fluxes in the OLMAT facility
Autor : Oyarzabal, E.
Palabras clave : CPS
Liquid metals
HHF facilities
DEMO divertor
PSI
NBI
Fecha de publicación : may-2023
Editorial : Fusion Engineering and Design
Citación : E. Oyarzabal et al, Fusion Engineering and Design 190 (2023) 113711.
Resumen : Four different tin-wetted, tungsten CPS (Capillary Porous System) targets where exposed to NBI pulses in the OLMAT High Heat flux (HHF) facility. They include two flexible ones placed on a TZM support (W meshes and W felt) and two compact ones (sintered W disk and 3D printed W). A comparative study was performed using a fastframe imaging camera and an infrared pyrometer. Surface temperature increase and homogeneity, particle ejection, CPS damage and overall behaviour were studied for each case. Sn drop/accumulation at the lower part of the targets was observed for all cases when they are heated up to around 400 ◦C except for the 3D printed W target that has its own Sn deposit. The 3D printed W target presented the best results in all aspects, withstanding heat pulses up to 58 MW/m2 in 100 ms without any damage or particle ejection. On the other hand, the W mesh targets displayed damage at 20 MW/m2 due to a bad thermal contact with the deposit, while the sintered W disk developed a crack during a series of 15 MW/m2 NBI pulses. As might be expected, a reduced increase of temperature during pulses is observed for the two compact W targets. The results and their relevance for the design of a Sn wetted W CPS for application as a DEMO-divertor material are discussed in the present work.
URI : http://documenta.ciemat.es/handle/123456789/2677
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