Investigation of carbon chemical erosion with increasing plasma flux and density

摘要

The possible reduction of the chemical erosion yield of carbon Y_(chem.). with increasing hydro- genic ion flux is a critical issue for the use of carbon based plasma facing materials in future high flux confinement devices. The PISCES linear plasma device is used to assess carbon Y_(chem.). through nearly an order of magnitude scan in flux (≤10~(23) s~-1 M~-2) and plasma density, while controlling other expo- sure parameters that are known to affect Y_chem.; namely, incident ion energy and surface temperature.