title: Formation of He-Rich Layers Observed by Neutron Reflectometry in the He-Ion-Irradiated Cr/W Multilayers: Effects of Cr/W Interfaces on the He-Trapping Behavior.
abstract: Cr/W multilayer nanocomposites were presented in the paper as potential candidate materials for the plasma facing components in fusion reactors. We used neutron reflectometry to measure the depth profile of helium in the multienergy He ions irradiated [Cr/W (50 nm)]3 multilayers. Results showed that He-rich layers with low neutron scattering potential energy form at the Cr/W interfaces, which is in great agreement with previous modeling results of other multilayers. This phenomenon provided a strong evidence for the He trapping effects of Cr/W interfaces and implied the possibility of using the Cr/W multilayer nanocomposites as great He-tolerant plasma facing materials.
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.
authors: Feida
authors: F
authors: Chen
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.|Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering , Nanjing 211106, China.
authors: Xiaobin
authors: X
authors: Tang
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.
authors: Hai
authors: H
authors: Huang
authors: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900, China.
authors: Xinxi
authors: X
authors: Li
authors: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900, China.
authors: Yan
authors: Y
authors: Wang
authors: Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900, China.
authors: Chaoqiang
authors: C
authors: Huang
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.
authors: Jian
authors: J
authors: Liu
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.
authors: Huan
authors: H
authors: Li
authors: Department of Nuclear Science & Engineering, Nanjing University of Aeronautics and Astronautics , Nanjing 211106, China.|Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering , Nanjing 211106, China.
authors: Da
authors: D
authors: Chen
keywords: Cr/W multilayer; He ion irradiation; interfaces; neutron reflectometry; trapping behavior