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Plasma-Material-Interaction Research Using PISCES Linear Plasma Devices

M. J. Baldwin, R. P. Doerner, D. Nishijima, M. Patino, M. J. Simmonds, G. Tynan, J. H. Yu, A. Založnik

Fusion Science and Technology / Volume 75 / Number 7 / October 2019 / Pages 664-673

Technical Paper / dx.doi.org/10.1080/15361055.2019.1646608

Received:June 14, 2018
Accepted:July 18, 2019
Published:October 7, 2019

Recent plasma-material-interaction (PMI) studies of relevance to fusion PMI science are discussed. The results are a mix of science experiments and in situ diagnostic technology development. Scientific issues addressed include the nature of He and W atom migration in the evolution of W fuzz surfaces, understanding the nature of D retention in damaged W surfaces via modeling with the tritium migration and analysis program, and an examination of synergistic effects associated with D trapping on composite Be codeposit and W substrate surfaces. In situ diagnostic developments discussed include laser-induced desorption spectroscopy for the measurement of bulk hydrogen retention and laser-induced breakdown spectroscopy for the measurement of near-surface composition.