Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten

Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten

Poly-crystalline tungsten (W) samples were simultaneously irradiated with Helium (He) and Deuterium (D) ions using the triple-ion implantation device. He effect on D retention and transportation was studied using different combination of ion energies and He/D flux ratios in the simultaneous implanta...

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Main Authors: Qilai Zhou, Keisuke Azuma, Akihiro Togari, Miyuki Yajima, Masayuki Tokitani, Suguru Masuzaki, Naoaki Yoshida, Masanori Hara, Yuji Hatano, Yasuhisa Oya
Format: Article
Language:English
Published: Elsevier 2018-08-01
Series:Nuclear Materials and Energy
Online Access:http://www.sciencedirect.com/science/article/pii/S2352179117301606
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spelling doaj-c906c0ce1a0b4f7ba4369e8e5d4c5c162020-11-24T23:25:33ZengElsevierNuclear Materials and Energy2352-17912018-08-01167681Deuterium retention behavior in simultaneously He+–D2+ implanted tungstenQilai Zhou0Keisuke Azuma1Akihiro Togari2Miyuki Yajima3Masayuki Tokitani4Suguru Masuzaki5Naoaki Yoshida6Masanori Hara7Yuji Hatano8Yasuhisa Oya9Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan; Corresponding author.Graduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, JapanGraduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, JapanNational Institute for Fusion science, Oroshi, Toki, Gifu 509-5292, JapanNational Institute for Fusion science, Oroshi, Toki, Gifu 509-5292, JapanNational Institute for Fusion science, Oroshi, Toki, Gifu 509-5292, JapanResearch Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, JapanHydrogen Isotope Research Center, University of Toyama, 930-8555, JapanHydrogen Isotope Research Center, University of Toyama, 930-8555, JapanFaculty of Science, Shizuoka University, Shizuoka 422-8529, JapanPoly-crystalline tungsten (W) samples were simultaneously irradiated with Helium (He) and Deuterium (D) ions using the triple-ion implantation device. He effect on D retention and transportation was studied using different combination of ion energies and He/D flux ratios in the simultaneous implantation. The experimental results show that D trapping at dislocation loops is significantly reduced in the case of 3 keV He+–3 keV D2+at He/D flux ratios over 0.6. D trapping by stronger trapping sites such as vacancies and vacancy clusters showed less dependence on the flux ratio. On the contrary, the D retention increases at each He/D flux ratio in the case of 3 keV He+–1 keV D2+compared to only D2+ implantation even the He/D flux ratio reaches a value of 1.0. TEM observations confirmed that dense dislocation loops are formed rather than He bubbles, which is responsible for the enhanced D retention in W. Keywords: Simultaneous implantation, D retention, Helium, Flux ratio, Transportation, Thermal desorption spectroscopyhttp://www.sciencedirect.com/science/article/pii/S2352179117301606
collection DOAJ
language English
format Article
sources DOAJ
author Qilai Zhou
Keisuke Azuma
Akihiro Togari
Miyuki Yajima
Masayuki Tokitani
Suguru Masuzaki
Naoaki Yoshida
Masanori Hara
Yuji Hatano
Yasuhisa Oya
spellingShingle Qilai Zhou
Keisuke Azuma
Akihiro Togari
Miyuki Yajima
Masayuki Tokitani
Suguru Masuzaki
Naoaki Yoshida
Masanori Hara
Yuji Hatano
Yasuhisa Oya
Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
Nuclear Materials and Energy
author_facet Qilai Zhou
Keisuke Azuma
Akihiro Togari
Miyuki Yajima
Masayuki Tokitani
Suguru Masuzaki
Naoaki Yoshida
Masanori Hara
Yuji Hatano
Yasuhisa Oya
author_sort Qilai Zhou
title Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
title_short Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
title_full Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
title_fullStr Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
title_full_unstemmed Deuterium retention behavior in simultaneously He+–D2+ implanted tungsten
title_sort deuterium retention behavior in simultaneously he+–d2+ implanted tungsten
publisher Elsevier
series Nuclear Materials and Energy
issn 2352-1791
publishDate 2018-08-01
description Poly-crystalline tungsten (W) samples were simultaneously irradiated with Helium (He) and Deuterium (D) ions using the triple-ion implantation device. He effect on D retention and transportation was studied using different combination of ion energies and He/D flux ratios in the simultaneous implantation. The experimental results show that D trapping at dislocation loops is significantly reduced in the case of 3 keV He+–3 keV D2+at He/D flux ratios over 0.6. D trapping by stronger trapping sites such as vacancies and vacancy clusters showed less dependence on the flux ratio. On the contrary, the D retention increases at each He/D flux ratio in the case of 3 keV He+–1 keV D2+compared to only D2+ implantation even the He/D flux ratio reaches a value of 1.0. TEM observations confirmed that dense dislocation loops are formed rather than He bubbles, which is responsible for the enhanced D retention in W. Keywords: Simultaneous implantation, D retention, Helium, Flux ratio, Transportation, Thermal desorption spectroscopy
url http://www.sciencedirect.com/science/article/pii/S2352179117301606
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