Molecular dynamics assessment of primary damage efficiency for fusion relevant elements

被引:0
作者
Agwunobi, Hannah [1 ]
Segantin, Stefano [2 ]
Short, Michael [3 ]
机构
[1] MIT, Dept Mech Engn, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
[2] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
[3] MIT, Plasma Sci & Fus Ctr, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA
关键词
Primary damage; Dpa efficiency; Arc-dpa coefficients; Molecular dynamics; ENERGY DISPLACEMENT CASCADES; PRIMARY RADIATION-DAMAGE; DEFECT PRODUCTION; INTERATOMIC POTENTIALS; PURE METALS; ALPHA-FE; BCC; SIMULATIONS; REACTOR; MODEL;
D O I
10.1016/j.jnucmat.2024.155520
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Accurate computational modeling of fusion reactors depends upon precise figures of merit for radiation damage. The Norgett-Robinson-Torrens displacements per atom (NRT-dpa) model, a gold standard parameter for characterizing primary damage in solids, has been shown to overestimate surviving Frenkel defects in materials under high-energy irradiation. Here, we investigate the NRT-dpa model at higher primary knock-on atom (PKA) energies for six pure metals of interest in fusion. We compute updated defect production efficiency values and athermal recombination corrected (ARC)-dpa efficiency parameters for each element, which can be used for increased accuracy in neutronics simulations and fitting other extensions to the NRT-dpa.
引用
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页数:8
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