Breaking the power law: Multiscale simulations of self-ion irradiated tungsten
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sharelatex_TungstenStudy Clean.pdf
Description
Main article after revisions
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2.39 MB
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Adobe PDF
Checksum (MD5)
852196ea67dcabf088dc9e4b2da5cf31
Author(s)
Jin, Miaomiao
Permann, Cody
Short, Michael P.
Date Issued
June 2018
Journal
Journal of Nuclear Materials
Publisher
Elsevier BV
Citation
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.
Version
Author's final manuscript
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.jnucmat.2018.03.018
