Breaking the power law: Multiscale simulations of self-ion irradiated tungsten
The initial stage of radiation defect creation has often been shown to follow a power law distribution at short time scales, recently so with tungsten, following many self-organizing patterns found in nature. The evolution of this damage, however, is dominated by interactions between defect clusters...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/130085 |
| _version_ | 1826189446348800000 |
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| author | Jin, Miaomiao Permann, Cody Short, Michael P. |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Jin, Miaomiao Permann, Cody Short, Michael P. |
| author_sort | Jin, Miaomiao |
| collection | MIT |
| description | The initial stage of radiation defect creation has often been shown to follow a power law distribution at short time scales, recently so with tungsten, following many self-organizing patterns found in nature. The evolution of this damage, however, is dominated by interactions between defect clusters, as the coalescence of smaller defects into clusters depends on the balance between transport, absorption, and emission to/from existing clusters. The long-time evolution of radiation-induced defects in tungsten is studied with cluster dynamics parameterized with lower length scale simulations, and is shown to deviate from a power law size distribution. The effects of parameters such as dose rate and total dose, as parameters affecting the strength of the driving force for defect evolution, are also analyzed. Excellent agreement is achieved with regards to an experimentally measured defect size distribution at 30 K. This study provides another satisfactory explanation for experimental observations in addition to that of primary radiation damage, which should be reconciled with additional validation data. |
| first_indexed | 2024-09-23T08:15:09Z |
| format | Article |
| id | mit-1721.1/130085 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:15:09Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1300852022-09-30T08:37:24Z Breaking the power law: Multiscale simulations of self-ion irradiated tungsten Jin, Miaomiao Permann, Cody Short, Michael P. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Short, Michael Philip The initial stage of radiation defect creation has often been shown to follow a power law distribution at short time scales, recently so with tungsten, following many self-organizing patterns found in nature. The evolution of this damage, however, is dominated by interactions between defect clusters, as the coalescence of smaller defects into clusters depends on the balance between transport, absorption, and emission to/from existing clusters. The long-time evolution of radiation-induced defects in tungsten is studied with cluster dynamics parameterized with lower length scale simulations, and is shown to deviate from a power law size distribution. The effects of parameters such as dose rate and total dose, as parameters affecting the strength of the driving force for defect evolution, are also analyzed. Excellent agreement is achieved with regards to an experimentally measured defect size distribution at 30 K. This study provides another satisfactory explanation for experimental observations in addition to that of primary radiation damage, which should be reconciled with additional validation data. 2021-03-04T17:00:20Z 2021-03-04T17:00:20Z 2018-06 2018-03 Article http://purl.org/eprint/type/JournalArticle 0022-3115 https://hdl.handle.net/1721.1/130085 Jin, Miaomiao et al. "Breaking the power law: Multiscale simulations of self-ion irradiated tungsten." Journal of Nuclear Materials 504 (June 2018): 33-40 © 2018 Elsevier B.V. en_US http://dx.doi.org/10.1016/j.jnucmat.2018.03.018 Journal of Nuclear Materials Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Prof. Short |
| spellingShingle | Jin, Miaomiao Permann, Cody Short, Michael P. Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title | Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title_full | Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title_fullStr | Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title_full_unstemmed | Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title_short | Breaking the power law: Multiscale simulations of self-ion irradiated tungsten |
| title_sort | breaking the power law multiscale simulations of self ion irradiated tungsten |
| url | https://hdl.handle.net/1721.1/130085 |
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