Erosion yields of carbon under various plasma conditions in Pilot-PSI
Abstract
Fine-grain graphite targets have been exposed to ITER divertor relevant plasmas in Pilot-PSI to address material migration issues in fusion devices. Optical emission spectroscopy and mass loss measurements have been employed to quantify gross chemical erosion and net erosion yields, respectively. Effects of the ion impact energy and target geometry on carbon erosion yields have been studied. It is concluded that temporal evolution of gross chemical erosion is strongly connected with changes in morphology of plasma exposed surfaces. The net carbon erosion yield is increased when the targets are partly covered by insulating boron-nitride rings.
Keywords
Cite
@article{arxiv.1210.3502,
title = {Erosion yields of carbon under various plasma conditions in Pilot-PSI},
author = {K. Bystrov and J. Westerhout and M. Matveeva and A. Litnovsky and L. Marot and E. Zoethout and G. De Temmerman},
journal= {arXiv preprint arXiv:1210.3502},
year = {2012}
}
Comments
14 pages, 4 figures, Contribution to the 19th International Conference on Plasma Surface Interactions