Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation

	Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation
	Ren Cuilan 3; Yang Yang 2; Li Yonggang 1; Huai Ping 3; Zhu Zhiyuan 3; Li Ju 2
刊名	NPJ COMPUTATIONAL MATERIALS
	2022
卷号	6
ISSN号	2096-5001
英文摘要	Accelerator-based ion-beam irradiation has been widely used to mimic the effects of neutron radiation damage in nuclear reactors. However, ion radiation is most often monodisperse in the incoming ions' momentum direction, leading to excessive polarization in defect distribution, while the scattering under neutron irradiation is often more isotropic and has less radiation-induced polarization. Mitigation of the excess-polarization as well as the damage non-uniformity artifact might be crucial for making the simulation of neutron radiation by ion-beam radiation more realistic. In this work, a general radiation polarization theory in treating radiation as external polar stimuli is established to understand the natural material responses in different contexts, and the possibility to correct the defect polarization artifact in ion-beam irradiation. Inspired by Magic Angle Spinning in Nuclear Magnetic Resonance, we present a precise sample spinning strategy to reduce the point-defect imbalance effect in ion-beam irradiation. It can be seen that with optimized surface inclination angle and the axis of sample rotation, the vacancy-interstitial population imbalance, as well as the damage profile non-uniformity in a designated region in the target are both reduced. It is estimated that sample spinning frequency on the order of kHz should be sufficient to scramble the ion momentum monodispersity for commonly taken ion fluxes and dose rates, which is experimentally feasible.
语种	英语
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/133125]
专题	中国科学院合肥物质科学研究院
作者单位	1.中国科学院固体物理研究所 2.麻省理工学院 3.中国科学院上海应用物理研究所
推荐引用方式 GB/T 7714	Ren Cuilan,Yang Yang,Li Yonggang,et al. Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation[J]. NPJ COMPUTATIONAL MATERIALS,2022,6.
APA	Ren Cuilan,Yang Yang,Li Yonggang,Huai Ping,Zhu Zhiyuan,&Li Ju.(2022).Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation.NPJ COMPUTATIONAL MATERIALS,6.
MLA	Ren Cuilan,et al."Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation".NPJ COMPUTATIONAL MATERIALS 6(2022).