Study of deuterium reflection on tungsten material with lithium coating in EAST tokamak

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2024-12-01 DOI:10.1016/j.nme.2024.101840

Qian Long , Guoliang Xu , Rui Ding , Hui Wang , Yunjia Zhang , Ran Hai , Xue Bai , Bingfu Gao , Junling Chen

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引用次数: 0

Abstract

Lithium (Li) coating of the first wall has been used as a routine way of wall conditioning on EAST and proved to have a significant influence on particle recycling. Whereas the deuterium (D) reflection process on tungsten (W) with Li coating is not well understood. The SDTrim.SP code is employed to investigate the D reflection process on the Li-W mixed material wall surface for EAST tokamak. The study reveals that the existence of Li coating can reduce the deuterium reflection rate significantly. This reduction in reflection is influenced by both the D impact energy and the thickness of the Li overlayer. Unlike the D reflection on pure metal materials, the D reflection rate shows a non-monotonic relationship with the D impact energy. Detail analysis shows that with the increase of D impact energy, the fraction of D which can penetrate through the Li overlayer and interact with the W substrate increases, leading to a significant increase of D reflection rate. For normal EAST divertor operation conditions, a Li overlayer thickness of 30 nm is required to keep the D reflection rate at a low level. The D reflection on W with a Li-W mixed overlayer has also been investigated and discussed in this work.

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.