He, Ne, Ar-bombardment of carbon first wall structures

Petra Träskelin, Kai Nordlund, Juhani Keinonen

    Research output: Contribution to journalConference articleScientificpeer-review


    During device operation of the next generation fusion device, ITER, carbon surfaces will be eroded during bombardments of low-energy hydrogen ions and impurities. The high chemical erosion rates, and co-deposition of tritium, are the main drawbacks of carbon as a plasma-facing material in fusion devices. Detailed knowledge about the evolution of the a-C:H layers and the behavior of sputtered hydrocarbon species is hence important in order to determine the fusion plasma dilution and the growth of hydrocarbon films on fusion device first walls. Cumulative bombardment simulations were performed of helium, neon, argon and hydrogen ions impinging onto a-C:H surfaces by employing reactive hydrocarbon potential models. The simulations were run for a noble gas/hydrogen ratio of 1/10, and at ion energies of 5 and 10 eV. At this ratio we find no significant differences between the sputtering yields of the different noble gas ions. (C) 2004 Elsevier B.V. All rights reserved.
    Original languageEnglish
    JournalNuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
    Issue number1-4
    Pages (from-to)319-324
    Number of pages6
    Publication statusPublished - 2005
    MoE publication typeA4 Article in conference proceedings
    EventUnknown host publication - , Netherlands
    Duration: 1 Jan 1800 → …

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