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Title: Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials

Abstract

Knowledge of mechanical and physical property evolution due to irradiation damage is essential for the development of future fission and fusion reactors. Ion-irradiation provides an excellent proxy for studying irradiation damage, allowing high damage doses without sample activation. Limited ion-penetration-depth means that only few-micron-thick damaged layers are produced. Substantial effort has been devoted to probing the mechanical properties of these thin implanted layers. Yet, whilst key to reactor design, their thermal transport properties remain largely unexplored due to a lack of suitable measurement techniques. Here we demonstrate non-contact thermal diffusivity measurements in ion-implanted tungsten for nuclear fusion armour. Alloying with transmutation elements and the interaction of retained gas with implantation-induced defects both lead to dramatic reductions in thermal diffusivity. These changes are well captured by our modelling approaches. Our observations have important implications for the design of future fusion power plants.

Authors:
 [1];  [2];  [3];  [3];  [3];  [2]
  1. Univ. of Oxford (United Kingdom)
  2. CCFE, Abingdon (United Kingdom)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1242042
Grant/Contract Number:  
SC0001299
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS

Citation Formats

Hofmann, F., Mason, D. R., Eliason, J. K., Maznev, A. A., Nelson, K. A., and Dudarev, S. L. Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials. United States: N. p., 2015. Web. doi:10.1038/srep16042.
Hofmann, F., Mason, D. R., Eliason, J. K., Maznev, A. A., Nelson, K. A., & Dudarev, S. L. Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials. United States. https://doi.org/10.1038/srep16042
Hofmann, F., Mason, D. R., Eliason, J. K., Maznev, A. A., Nelson, K. A., and Dudarev, S. L. Tue . "Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials". United States. https://doi.org/10.1038/srep16042. https://www.osti.gov/servlets/purl/1242042.
@article{osti_1242042,
title = {Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials},
author = {Hofmann, F. and Mason, D. R. and Eliason, J. K. and Maznev, A. A. and Nelson, K. A. and Dudarev, S. L.},
abstractNote = {Knowledge of mechanical and physical property evolution due to irradiation damage is essential for the development of future fission and fusion reactors. Ion-irradiation provides an excellent proxy for studying irradiation damage, allowing high damage doses without sample activation. Limited ion-penetration-depth means that only few-micron-thick damaged layers are produced. Substantial effort has been devoted to probing the mechanical properties of these thin implanted layers. Yet, whilst key to reactor design, their thermal transport properties remain largely unexplored due to a lack of suitable measurement techniques. Here we demonstrate non-contact thermal diffusivity measurements in ion-implanted tungsten for nuclear fusion armour. Alloying with transmutation elements and the interaction of retained gas with implantation-induced defects both lead to dramatic reductions in thermal diffusivity. These changes are well captured by our modelling approaches. Our observations have important implications for the design of future fusion power plants.},
doi = {10.1038/srep16042},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Tue Nov 03 00:00:00 EST 2015},
month = {Tue Nov 03 00:00:00 EST 2015}
}

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