Hydrodynamic Effects of Eroded Materials on Response of Plasma-Fachg Component during a Tokamak Disruption*
نویسندگان
چکیده
Loss of plasma co@nement causes surface and structural damage to plasma-facing materials (PFMs) and remains a major obstacle for tokamak reactors. The deposited plasma energy results in surface erosion and structural failure. The surface erosion consists of vaporization, spallation, and liquid splatter of metallic materials, while the structural damage includes large temperature increases in structural materials and at the interfaces between surface coatings and structural members. Comprehensive models (contained in the HEIGHTS computer simulation package). are being used selfconsistently to evaluate material damage. Splashing mechanisms occur as a result of volume bubble boiling and liquid hydrodynamic instabilities and brittle destruction mechanisms of nonmelting materials. The effect of macroscopic erosiQn on total mass losses and lifetime is evaluated. The macroscopic erosion products may tier protect PFMs horn severe erosion (via the droplet-shielding effect) in a manner similar to that of the vapor shielding concept. *Permanent address: Troitsk Institute for Innovation and Fusion Research, Russia.
منابع مشابه
Hydrodynamic eects of eroded materials of plasma-facing component during a Tokamak disruption
Loss of plasma con®nement causes surface and structural damage to plasma-facing materials (PFMs) and remains a major obstacle for tokamak reactors. The deposited plasma energy results in surface erosion and structural failure. The surface erosion consists of vaporization, spallation, and liquid splatter of metallic materials, while the structural damage includes large temperature increases in s...
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