Single crystal growth and formation of defects in deuterium-tritium layers for inertial confinement nuclear fusion

Chernov, A. A.; Kozioziemski, B. J.; Koch, J. A.; Atherton, L. J.; Johnson, M. A.; Hamza, A. V.; Kucheyev, S. O.; Lugten, J. B.; Mapoles, E. A.; Moody, J. D.; Salmonson, J. D.; Sater, J. D.
February 2009
Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG
Academic Journal
We identify vapor-etched grain boundary grooves on the solid-vapor interface as the main source of surface roughness in the deuterium-tritium (D–T) fuel layers, which are solidified and then cooled. Current inertial confinement fusion target designs impose stringent limits to the cross-sectional area and total volume of these grooves. Formation of these grain boundaries occurs over time scales of hours as the dislocation network anneals and is inevitable in a plastically deformed material. Therefore, either cooling on a much shorter time scale or a technique that requires no cooling after solidification should be used to minimize the roughness.


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