Abstract
Sputtering in a divertor is one of the key phenomena that affects plasma purity and temperature. In previous experimental studies, the term sputtering yield has been used to refer to net sputtering yield, which is defined as the difference between primary sputtering yield and re-deposition. Our simulations using molecular dynamics have confirmed that both primary sputtering yield and re-deposition are affected by particle curvature. In this study, the effect of particle curvature on the net sputtering yield was quantitatively evaluated, the results were compared to existing experimental studies, and the discrepancies with experimental results were discussed.
Highlights
A divertor is an armor component that maintains the integrity of fusion reactors from the irradiation of high-temperature plasma
We conducted a tungsten divertor sputtering simulation using molecular dynamics. Both primary sputtering yield and re-deposition are affected by the curvature of the surface atoms, and former studies have focused on the latter
Since the number of bonds of surface tungsten atoms varies depending on the curvature, the primary sputtering yield will increase with the curvature
Summary
A divertor is an armor component that maintains the integrity of fusion reactors from the irradiation of high-temperature plasma. He ions and neutrons are produced as a result of fusion reactions between deuterium and tritium in ultra-high temperature plasma [1,2]. The irradiation of the He ions and neutrons degrades the properties of materials; the integrity of the components is damaged [3,4]. Since the sputtering yield of tungsten is considerably low amongst all high-temperature materials, tungsten has been considered to be a potential material for use in this application [8,9,10,11]. Tungsten has several disadvantages, efforts have been made to overcome these disadvantages and use it as a divertor material [12,13,14,15]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
