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ITPA Avilla January 2008 © Matej Mayer Surface modifications and blistering of tungsten exposed in ASDEX Upgrade M. Mayer, M. Balden, S. Lindig, J. Roth, R. Neu, ASDEX Upgrade team Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching, Germany
ITPA Avilla January 2008 © Matej Mayer Blister formation in W, laboratory studies W. Wang et al., JNM 299 (2001) 124 Surface modifications observed after bombardment of W by hydrogen in laboratory studies Blister formation Polycrystalline tungsten samples (Langmuir probes) exposed in AUG outer divertor in 2007 for 2620 s
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor Blister-like structures are observed
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor Do these structures contain voids? FIB using 30 keV Ga
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor Protective carbon coating for FIB
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor Blister-like structures filled with material, no voids These are no blisters
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor But:
ITPA Avilla January 2008 © Matej Mayer Langmuir probes from outer divertor A few blisters are observed in this area of the sample
ITPA Avilla January 2008 © Matej Mayer Summary Blister-like structures are observed, but they are solid and do not contain voids No blisters A few blisters are observed in some areas of the sample Surface modifications of W due to plasma exposure are small
Computing Center of Max-Planck-Society and Institute of Plasmaphysics K. Stoeckigt, U. Schwenn – H.323 Opensource Firewall Solutions 1 H.323 & Firewalls.
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CIPS SEWG FR, JET 2008C. Hopf O 2 /He glow discharge cleaning: Experience at IPP Christian Hopf, Volker Rohde, Wolfgang Jacob Max-Planck-Institut für Plasmaphysik.
Kazuyoshi Sugiyama, SEWG meeting on Fuel retention, Garching, July Contribution of Boron on the D retention in the AUG full-W wall regime Max-Planck-Institut.
SEWG Gas Balance 2007 © Matej Mayer First results on deuterium depth profiling in W tiles M. Mayer 1, V.Kh. Alimov, V. Rohde 1, J. Roth 1, A. Herrmann.
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