High energy (E > 1 MeV/amu) heavy ion beams have been proved as a powerful tool for material modification and became to be widely used in radiation solid state physics. This in a large measure is due to huge energy deposition in nanometer volume surrounding swift heavy ion trajectory which often leads to structural rearrangements not achievable by other methods. The experimental base of the research in material science in FLNR is the accelerators:
- U-400 (ion energies up to 10 MeV/amu)
- IC-100 cyclotron for applied research. The energy of Ne, Ar, Fe, Kr, Xe, W ions is 1.2 MeV/amu
- Low energy (E = Z x 20 keV, Z varies from +1 to +17) ion irradiation set-up based on ECR ion source.
All ion irradiation facilities include special ion beam leading lines from the accelerator to the user irradiation chambers equipped with ion beam scanning system in horizontal and vertical directions and all necessary elements for ion beam parameters evaluation and control. These systems make it possible to provide the beam with a homogeneous intensity distribution on irradiation area and to vary the beam intensity in a broad range.
Main directions of undergoing and planned investigations are:
- Simulation of fission product impacts in nuclear reactor materials and inert matrix fuel hosts with heavy ion beams of fission fragments energy;
Fig. 1. 3D AFM image of MgAl2O4 surface irradiated with 710 MeV Bi ions. Ion fluence 5x1010 cm-2
The research in radiation material science is undergoing in close collaboration with institutions from JINR member countries (Belarus, Slovakia, Poland) and Hungary, Republic of South Africa, Egypt.