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Primary and secondary metallic PFC damage induced by runaway electron dissipation in FTU
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DOI：10.1016/j.nme.2026.102089.png)
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Abstract
En 中文
Runaway electron (RE) interaction with plasma-facing components (PFCs) has been documented to lead to deep volumetric melting and thermal shock driven material explosions followed by extensive wall cratering. This work reports a post-mortem FTU investigation that covers the primary localized RE-induced damage directly caused by beams striking poloidal or toroidal molybdenum (Mo)-based limiters and the subsequent secondary non-localized RE-induced damage inflicted on nearby limiter tiles by the mechanical impact of fast up to similar to 1 km/s solid debris violently ejected during the direct RE-PFC interaction. Early indications on the resilience of tin liquid limiters to RE incidence are also presented.
Keywords:
Runaway electron impact
Dust in tokamaks
PFC damage
High velocity impacts
Liquid metal limiter
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