Dynamics of hydrogen isotope trapping and detrapping for tungsten under simultaneous triple ion (C+, D-2(+) and He+) implantation

作者：Oya Yasuhisa^*; Kobayashi Makoto; Kurata Rie; Wang Wanjing; Ashikawa Naoko; Sagara Akio; Yoshida Naoaki; Hatano Yuji; Okuno Kenji

来源：Journal of Nuclear Materials, 2011, 415(1): S701-S704.

DOI：10.1016/j.jnucmat.2010.09.058

To elucidate the simultaneous implantation effects on deuterium retention in polycrystalline tungsten, simultaneous 10 keV C+, 3 keV D-2(+) and 3 keV He+ implantation was performed at room temperature. He+/D+ flux ratio dependence of deuterium retention indicated that He+ implantation induced high deuterium retention even if the He+/D+ flux ratio was low. D-2 TDS spectrum for C+-D-2(+) implanted tungsten was clearly different from the samples with only D-2(+), D-2(+)-He+ and C+D2+-He+ implantation, indicating that D was trapped by C as C-D bond. For D-2(+)-He+ implantation sample, He+ implantation would introduce irradiation damages and D retention increased. However, C+-D-2(+)-He+ implantation, the accumulation of C on tungsten was suppressed and the retention of D trapped by C clearly decreased. These facts indicated the D retention for C+-D2+He+ implanted tungsten was limited by He+ implantation and most of D would be retained in the interstitial sites or irradiation defects under simultaneous implantation with He.

• 出版日期2011-8-1