Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation
Abstract 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 s...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2020-12-01
|
| Series: | npj Computational Materials |
| Online Access: | https://doi.org/10.1038/s41524-020-00438-9 |
| _version_ | 1818346580520992768 |
|---|---|
| author | Cui-Lan Ren Yang Yang Yong-Gang Li Ping Huai Zhi-Yuan Zhu Ju Li |
| author_facet | Cui-Lan Ren Yang Yang Yong-Gang Li Ping Huai Zhi-Yuan Zhu Ju Li |
| author_sort | Cui-Lan Ren |
| collection | DOAJ |
| description | Abstract 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. |
| first_indexed | 2024-12-13T17:20:32Z |
| format | Article |
| id | doaj.art-b5ded135c8c0459caccab69d8b8f421c |
| institution | Directory Open Access Journal |
| issn | 2057-3960 |
| language | English |
| last_indexed | 2024-12-13T17:20:32Z |
| publishDate | 2020-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Computational Materials |
| spelling | doaj.art-b5ded135c8c0459caccab69d8b8f421c2022-12-21T23:37:19ZengNature Portfolionpj Computational Materials2057-39602020-12-016111110.1038/s41524-020-00438-9Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiationCui-Lan Ren0Yang Yang1Yong-Gang Li2Ping Huai3Zhi-Yuan Zhu4Ju Li5Shanghai Institute of Applied Physics, Chinese Academy of SciencesDepartment of Nuclear Science and Engineering, Massachusetts Institute of TechnologyKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of SciencesShanghai Institute of Applied Physics, Chinese Academy of SciencesShanghai Institute of Applied Physics, Chinese Academy of SciencesDepartment of Nuclear Science and Engineering, Massachusetts Institute of TechnologyAbstract 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.https://doi.org/10.1038/s41524-020-00438-9 |
| spellingShingle | Cui-Lan Ren Yang Yang Yong-Gang Li Ping Huai Zhi-Yuan Zhu Ju Li Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation npj Computational Materials |
| title | Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation |
| title_full | Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation |
| title_fullStr | Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation |
| title_full_unstemmed | Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation |
| title_short | Sample spinning to mitigate polarization artifact and interstitial-vacancy imbalance in ion-beam irradiation |
| title_sort | sample spinning to mitigate polarization artifact and interstitial vacancy imbalance in ion beam irradiation |
| url | https://doi.org/10.1038/s41524-020-00438-9 |
| work_keys_str_mv | AT cuilanren samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation AT yangyang samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation AT yonggangli samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation AT pinghuai samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation AT zhiyuanzhu samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation AT juli samplespinningtomitigatepolarizationartifactandinterstitialvacancyimbalanceinionbeamirradiation |