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Overview of wall probes for erosion and deposition studies in the TEXTOR tokamak

Matter and Radiation at Extremes 2017年第3期2卷 87-104页

作者： M.Rubel s.brezinsek J.W.Coenen A.Huber A.Kirschner A.Kreter P.Petersson V.Philipps A.Pospieszczyk B.schweer G.sergienko T.Tanabe Y.Ueda P.Wienhold Department of Fusion Plasma Physics Royal Institute of TechnologyS-10044 StockholmSweden Forschungszentrum Julich GmbH Institut fur Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)52425 JulichGermany Interdisciplinary Graduate school of Engineering science Kyushu UniversityJapan Graduate school of Engineering Osaka UniversityOsaka 565-0871Japan

An overview of diagnostic tools e test limiters and collector probes e used over the years for material migration studies in the TEXTOR tokamak is *** transfer systems are shown and their technical capabilities are *** is accompanied by a brief pre-sentation of selected results and conclusions from the research on material erosion e deposition processes including tests of candidate materials(e.g.W,Mo,carbon-based composites)for plasma-facing components in controlled fusion *** use of tracer techniques and methods for analysis of materials retrieved from the tokamak are *** impact of research on the reactor wall technology is addressed.

关键词： Erosion-deposition Material migration Deuterium retention Carbon Tungsten TEXTOR

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Probe manipulators for Wendelstein 7-X and their interaction with the magnetic topology

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Plasma science and Technology 2018年第5期20卷 6-17页

作者： M RACK D HOsCHEN D REITER B UNTERBERG J W COENEN s.brezinsek O NEUBAUER s BOZHENKOV G CZYMEK Y LIANG M HUBENY Ch LINsMEIER the Wendelstein 7-X Team Forschungszentrum Julich GmbH Institut für Energie- und Klimaforschung-Plasmaphysik Partner of the Trilateral Euregio Cluster (TEC) D-52425 Julich Germany JARA-HPC D-52425 Julich Germany Max-Planck-Institut für Plasmaphysik D-17491 Greifswald/D-85748 Garching Germany

Probe manipulators are a versatile addition to typical plasma edge *** with material samples they allow for detailed investigation of plasma–wall interaction processes,such as material erosion,deposition or impurity transport *** combined with electrical probes,a study of scrape-off layer and plasma edge density,temperature and flow profiles as well as magnetic topologies is possible.A mid-plane manipulator is already in operation on Wendelstein 7-X.A system in the divertor region is currently under *** the present paper we discuss the critical issue of heat and power loads,power redistribution and experimental access to the complex magnetic topology of Wendelstein *** the aforementioned aspects are of relevance for the design and operation of a probe manipulator in a device like Wendelstein？7-X.A focus is put on the topological region that is accessible for the different coil current configurations at Wendelstein 7-X and the power load on the manipulator with respect to the resulting different magnetic *** analysis of power loads on plasma-facing components is performed using a numerical tracer particle diffusion tool provided via the Wendelstein 7-X Webservices.

关键词： stellarators Wendelstein 7-X manipulator divertor power load

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