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. DOI: 10.1103/PhysRevLett.110.105001
Keywords
GRAPHITE; ADSORPTION; SURFACE
DOI
10.1103/PhysRevLett.110.105001
Citation
Phys. Rev. Lett. 110, 105001 – Published 4 March 2013
Date of this Version
3-4-2013
Recommended Citation
Krstic, P. S.; Allain, Jean Paul; Taylor, C. N.; Dadras, J.; Maeda, S.; Morokuma, K.; Jakowski, J.; Allouche, A.; and Skinner, C. H., "Deuterium Uptake in Magnetic-Fusion Devices with Lithium-Conditioned Carbon Walls" (2013). Birck and NCN Publications. Paper 1362.
http://dx.doi.org/10.1103/PhysRevLett.110.105001
Comments
This is the published version of P. S. Krstic, J. P. Allain, C. N. Taylor, J. Dadras, S. Maeda, K. Morokuma, J. Jakowski, A. Allouche, and C. H. Skinner. 4 March 2013. Deuterium Uptake in Magnetic-Fusion Devices with Lithium-Conditioned Carbon Walls. First published in the Physical Review Letters and is available online at: http://dx.doi.org/10.1103/PhysRevLett.110.105001