Deuterium uptake in magnetic-fusion devices with lithium-conditioned carbon walls

P. S. Krstic, J. P. Allain, C. N. Taylor, J. Dadras, S. Maeda, K. Morokuma, J. Jakowski, A. Allouche, C. H. Skinner

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Abstract

Lithium wall conditioning has lowered hydrogenic recycling and dramatically improved plasma performance in many magnetic-fusion devices. In this Letter, we report quantum-classical atomistic simulations and laboratory experiments that elucidate the roles of lithium and oxygen in the uptake of hydrogen in amorphous carbon. Surprisingly, we show that lithium creates a high oxygen concentration on a carbon surface when bombarded by deuterium. Furthermore, surface oxygen, rather than lithium, plays the key role in trapping hydrogen.

Original languageEnglish (US)
Article number105001
JournalPhysical Review Letters
Volume110
Issue number10
DOIs
StatePublished - Mar 4 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Krstic, P. S., Allain, J. P., Taylor, C. N., Dadras, J., Maeda, S., Morokuma, K., Jakowski, J., Allouche, A., & Skinner, C. H. (2013). Deuterium uptake in magnetic-fusion devices with lithium-conditioned carbon walls. Physical Review Letters, 110(10), [105001]. https://doi.org/10.1103/PhysRevLett.110.105001