Temperature dependence of surface topography and deuterium retention in tungsten exposed to low-energy, high-flux D plasma

[摘要] Surface topography and deuterium retention in tungsten have been examined after exposure to a low-energy (38 eV/D), high-flux (10(22) D/m(2)s) deuterium plasma at ion fluences of 10(26) and 10(27) D/m(2) and various temperatures. The methods used were scanning electron microscopy equipped with focused ion beam, thermal desorption spectroscopy. and the D(He-3,p)He-4 nuclear reaction at He-3 energies varied from 0.69 to 4.0 MeV. During exposure to the D plasma, blisters with various shapes and sizes depending on the exposure temperature are formed on the W surface. At the temperatures above 700 K no blisters appear. The deuterium retention increases with the exposure temperature, reaching its maximum value of about 10(22) D/m(2) at 480-530 K. and then decreases to about 10(19) D/m(2) at 800 K. (C) 2011 Published by Elsevier B.V.

[发布日期] 2011-10-01

[效力级别]  Proceedings Paper