Title of article :
Thermal desorption and surface modification of He+ implanted into tungsten
Author/Authors :
Fu، نويسنده , , Zhang and Yoshida، نويسنده , , N and Iwakiri، نويسنده , , H and Xu، نويسنده , , Zengyu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
5
From page :
692
To page :
696
Abstract :
Tungsten divertor plates in fusion reactors will be subject to helium bombardment. Helium retention and thermal desorption is a concerned issue in controlling helium ash. In the present study, fluence dependence of thermal desorption behavior of helium in tungsten was studied at different irradiation temperatures and ion energies. Results showed that helium desorption could start at ∼400 K with increasing fluence, while no noticeable peaks were detected at low fluence. Total helium desorption reached a saturation value at high fluence range, which was not sensitive to irradiation temperature or ion energy for the conditions evaluated. Surface modifications caused by either ion irradiation or thermal desorption were observed by SEM. The relationship of surface modifications and helium desorption behavior was discussed. Some special features of elevated irradiation temperature and lower ion energy were also indicated.
Journal title :
Journal of Nuclear Materials
Serial Year :
2004
Journal title :
Journal of Nuclear Materials
Record number :
1358904
Link To Document :
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