Flux dependence of sputtering yield for C and B4C by high flux neutral beam
1995; Elsevier BV; Volume: 220-222; Linguagem: Inglês
10.1016/0022-3115(94)00604-0
ISSN1873-4820
AutoresY. Ohtsuka, Michiro Isobe, Katsura Nakano, Y. Ueda, Shusaku Goto, Masahiro Nishikawa,
Tópico(s)Nuclear Materials and Properties
ResumoThe sputtering yields of isotropic graphite PD330S and conversion B4C irradiated by high flux neutral beam have been investigated. The specification of the beam is as follows: deuterium flux from 2 × 1021 to 1 × 1022/m2 s with 9% of oxygen and acceleration energy of 5 keV. The samples are irradiated at a normal incidence in the temperature range from 520 to 1070 K. For a flux of 1 × 1022/m2 s, the chemical sputtering yield of PD330S is suppressed in comparison with previous data for low flux beam irradiation experiments and a local peak of sputtering yield appears between 870 and 970 K. Moreover as the incident flux is increased, the sputtering yield at 770 K has a large variation and a maximum value in 5 × 1021/m2 s for PD330S. The sputtering yield of conversion B4C is 50 ∼ 60% smaller than that of PD330S at a temperature of 970 K.
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