engleski

Use of MeV energy electrostatic accelerators in materials modification and analysis

Through the Laboratory for Ion Beam Interactions the Division of Experimental Physics of the Ruđer Bošković Institute (RBI) operates and maintains the Tandem Accelerators Facility, that physically consists of the 6 MV Tandem Van de Graaff and 1 MV Tandetron accelerators, associated beam lines and eight end-stations. The accelerators can deliver various ions with energies from 0.1 to tens MeVs. The accelerators are mainly used for ion beam modification and analysis studies and occasionally for experimental nuclear physics, i.e. measurements of nuclear reaction cross sections and other fundamental parameters relevant for astrophysics, ion beam modification and analysis (IBA) of materials and other applications. The facility is equipped with general IBA end station for RBS (Rutherford Backscattering Spectrometry), PIXE (Particle Induced X-Ray Spectrometry) and PIGE (Particle Induced Gamma- Ray Spectrometry), and with stations for Time- of-Flight Elastic Recoil Detection Analysis (TOF-ERDA), ion channeling, MeV SIMS (Secondary Ion Mass Spectrometry), and High-Resolution PIXE. In addition, two ion microprobes and dual beam end station are available to users. In this work the overview of the RBI Tandem Accelerator Facility will be presented, with the focus on its recent use for materials modification and analysis. A huge potential of the experimental setups will be demonstrated by presenting selected applications performed recently on a wide range of materials using broad and focused ion beams. Recently the facility has been increasingly used to study fusion energy related materials, including analysis of plasma facing components1 and loose materials2 (dust) collected after experimental campaigns with fusion devices. In addition, large irradiation chamber has been constructed to apply dual ion beams for materials irradiation in order to simulate potential damage of fast neutrons that could be expected in fusion reactors after long runs3, 4. Another well developed application includes the use of ion beams to study radiation hardness and charge collection efficiency of solid state radiation detectors and related materials by Ion Beam Induced Current (IBIC) and Time Resolved IBIC techniques6-8. The range of recent applications also include the use of swift heavy ions for material modification studies9-13 (including ion track formation in crystalline materials and damage of 2D materials like graphene), elemental depth profiling in thin films14, analysis of aerosols, cultural heritage objects15 and biomedical applications16. Potential for further developments will also be discussed, including the need and availability of fundamental data17. 1. M. Mayer, et al., Nuclear Materials and Energy 17 (2018) 147 – 151. 2. S. Fazinić et al., Analytical Chemistry 90 (2018) 5744-5752. 3. C. Hardie et al., Scientific Reports (2019) to be published. 4. M.T. Lessmann et al., Journal of Nuclear Materials 486 (2017) 34-43. 5. N. Skukan et al., Appl. Phys. Lett. 109 (2016) 043502. 6. J. Forneris et al., Phys. Rev. Applied 10 (2018) 014024. 7. J. Forneris et al., Carbon 113 (2017) 76-86. 8. S. Ditalia Tchernij et al., ACS Photonics 4 (10) (2017) 2580–2586. 9. M.Karlušić et al., Journal of Nuclear Materials 514 (2019) 74-83. 10. A. Flessa et al., Journal of Raman Spectroscopy 50 (2019) 1186-1196. 11. M. Karlušić et al., New Journal of Physics 19 (2017) 023023. 12. H. Vazquez Muiños et al., Carbon 114 (2017) 511. 13. I Bogdanović Radović et al., New Journal of Physics 18 (2016) 093032. 14. Z. Siketić et al., Scientific Reports 8 (2018) 10392. 15. N. Topić et al., Archaeological and Anthropological Sciences 11 (2019) 2347-2365. 16. Z. Siketić, et al., Appl. Phys. Lett. 107 (2015) 093702. 17. I. Božičević Mihalić et al., Journal of Analytical Atomic Spectrometry 31 (2016) 2293- 2304.

Accelerators ; materials analysis ; materials modification

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