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Helium and Displacement Damage Produced by 600 MeV Proton Beams in High Purity Aluminum

Gavillet, D
Research assistant, research associate, and professor,Ecole Polytechnique Federale (EPFL),

Gotthardt, R
Research assistant, research associate, and professor,Ecole Polytechnique Federale (EPFL),

Martin, J-L
Research assistant, research associate, and professor,Ecole Polytechnique Federale (EPFL),

Green, SL
All, senior research officers,Swiss Federal Institute for Reactor Research (EIR),

Green, WV
All, senior research officers,Swiss Federal Institute for Reactor Research (EIR),

Victoria, M
All, senior research officers,Swiss Federal Institute for Reactor Research (EIR),

Pages: 13    Published: Jan 1985

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Source: STP870-EB

Abstract

Pure aluminium samples (99.9999%) have been irradiated in the Proton Irradiation Experiment (PIREX) installed in the 600 MeV proton beam of the accelerator in the Swiss Nuclear Research Institute (SIN), at temperatures between 400 K and 500 K and displacement doses between 0.9 and 5 displacements per atom (dpa). Average displacement rate is 3.5 × 10^-6 dpa/s.

The specimens were analyzed for both ³He and ⁴He. Measured helium content is 215 atomic parts per million (appm)/dpa. No diffusional spreading of sodium or helium was measured. The helium bubble structure was examined and shows a swelling of 0.16% at ∼5 dpa.

Keywords:
aluminium, radiation damage, displacement damage, helium production, accelerator irradiations, bubbles in metals, radiation

Paper ID: STP37375S
Committee/Subcommittee: E10.02
DOI: 10.1520/STP37375S
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