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Coupled simulation of plasma-surface interactions during early stages of vacuum arcing

arXiv Physics Friday 05 June 2026, 04:00 UTC By Roni Koitermaa, Andreas Kyritsakis, Tauno Tiirats, Flyura Djurabekova, Veronika Zadin 1 min read
Key Points

arXiv:2606.05893v1 Announce Type: new Abstract: We describe fully coupled simulations that bridge atomistic cathode dynamics and plasma formation during the earliest stages of vacuum arcing. The model combines molecular dynamics, finite element electrothermal calculations, electron emission and particle-in-cell plasma simulations via dynamic transfer of particles between the surface and plasma domains. Simulations of Cu nanoprotrusions reveal two routes to thermal runaway: direct Joule...

arXiv:2606.05893v1 Announce Type: new Abstract: We describe fully coupled simulations that bridge atomistic cathode dynamics and plasma formation during the earliest stages of vacuum arcing. The model combines molecular dynamics, finite element electrothermal calculations, electron emission and particle-in-cell plasma simulations via dynamic transfer of particles between the surface and plasma domains. Simulations of Cu nanoprotrusions reveal two routes to thermal runaway: direct Joule heating-driven instability and a novel nanoparticle-assisted mechanism, where detached nanoparticles generate neutral vapor that becomes ionized.
Cu (ORG) Joule (PERSON)
Originally published by arXiv Physics Read original →

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