Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 455, Issue 1-3, Pages 207-211Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2014.06.007
Keywords
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Funding
- Tekes Finnish Funding Agency for Technology and Innovation
- European Union
- Kulturfonden
- RCUK Energy Programme [EP/I501045]
- United Kingdom Engineering and Physical Sciences Research Council [P/G050031]
- EPSRC [EP/H018921/1, EP/I501045/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H018921/1] Funding Source: researchfish
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Neutrons in fusion reactors produce primary radiation damage from displacement cascades in tungsten (W) at an average PICA energy of 150 keV. We find, using molecular dynamics simulations, that cascades at this energy do not break up into subcascades. The massive amount of energy concentrated in the liquid-like heat spike facilitates a fairly high rate of formation of large dislocation loops and other defect structures, of sizes readily visible in today's electron microscopes. We investigate the structures and distribution of the cascade debris in W predicted by different interatomic potentials. In particular, our simulations show the formation of < 100 >-type dislocation loops, in agreement with recent experiments and in contradiction to the earlier held view that only 1/2 < 111 >-type loops occur in W. (C) 2014 Elsevier B.V. All rights reserved.
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