Return To: Session FT/P1 - Technology Developments
Prev Page: (FT/P1-04) Investigation of Hydrogen Isotopes Interaction with ITER
Next Page: (FT/P1-06) Ferromagnetic and Resistive Wall Effects on Beta

(FT/P1-05) Copper Alloys Selected for ITER Investigated by Positron Annihilation Spectroscopy

V. Slugen¹⁾, P. Ballo¹⁾, P. Domonkos^1)
 
1) Slovak University of Technology, Bratislava, Slovakia

Abstract.  The work is oriented towards the study of the high-energy neutron (proton) flux induced disorder in for ITER selected Cu-alloys by positron annihilation spectroscopy (PAS). Defects in the form of vacancies (loops, voids, etc.) in Cu-alloys were studied using pulsed low energy system (PLEPS). The selected specimens were implanted in Ion beam laboratory of FEI STU Bratislava. The energy of implantation was EH = 2 x 95 keV for the molecular H⁺₂ ion beam. Two implantation doses were chosen for both of the alloys: 1.3×10¹⁹ ions/ cm² (1.1 C/ cm²) and 5 ×10¹⁸ ions/ cm² (0.4 C/ cm²). Using PLEPS a depth profiling and a void creation (probably filled with H₂) in the area from 50-480 nm was observed. The experimental simulation (for the range where protons and neutron are not thermalised) of radiation damage of ITER construction materials was successfully performed. After isochronal annealing of both materials in vacuum in range 100-600ºC, the recovering of defects in CuCrZr was much more effective than in CuAl25.

Read the full paper in PDF format.