STP725: Simulation of Short-Term Annealing of Displacement Cascades in Face-Centered Cubic Metals

    Heinisch, HL
    Senior scientist and manager, Hanford Engineering Development Laboratory, Richland, Wash.

    Doran, DG
    Senior scientist and manager, Hanford Engineering Development Laboratory, Richland, Wash.

    Schwartz, DM
    Professor of engineering, California State University-Northridge, Northridge, Calif.

    Pages: 10    Published: Jan 1981


    Abstract

    Computer models have been developed for the simulation of high-energy displacement cascades. The objective is the generation of defect production functions for use in correlation analysis of radiation effects in fusion reactor materials. In particular, the stochastic cascade annealing simulation (SCAS) code has been developed and used to model the short-term annealing behavior of simulated cascades in face-centered cubic metals. The code is fast enough to make annealing of high-energy cascades practical. Sets of cascades from 5 to 100 keV in copper were generated by the binary collision code MARLOWE.

    In order to simulate the recombination occurring during the localized quenching of the highly excited cascade region, an effective spontaneous recombination radius was applied to reduce the number of defects to be consistent with values measured at 4 K. The individual cascades were then annealed with SCAS and examined at stages of short-term annealing corresponding approximately to Stages I and III. The total number of surviving defects in an isolated cascade produced at any temperature is proportional to the damage energy for cascade energies above 5 keV. Comparison is also made with previous cascade annealing simulations.

    Keywords:

    radiation, irradiation, radiation damage, fusion reactors, simulation, annealing, displacement cascades


    Paper ID: STP28214S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP28214S


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