Deuterium Uptake in Magnetic-Fusion Devices with Lithium-Conditioned Carbon Walls

P. S. Krstic, University of Tennessee - Knoxville; Oak Ridge National Laboratory
Jean Paul Allain, Birck Nanotechnology Center, Purdue University
C. N. Taylor, Purdue University; Idaho National Laboratory
J. Dadras, University of Tennessee - Knoxville; University of California - Los Angeles
S. Maeda, Kyoto University
K. Morokuma, Kyoto University
J. Jakowski, University of Tennessee
A. Allouche, CNRS, PIM; University of Aix-Marseille
C. H. Skinner, Princeton University

Date of this Version



Phys. Rev. Lett. 110, 105001 – Published 4 March 2013


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:


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


Nanoscience and Nanotechnology