A5086214679- Fusion materials and technologies
- Ion-surface interactions and analysis
- Magnetic confinement fusion research
- Nuclear Materials and Properties
- Advanced Condensed Matter Physics
- Metal and Thin Film Mechanics
- Magnetic and transport properties of perovskites and related materials
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Laser-induced spectroscopy and plasma
- Magnetic properties of thin films
- Nuclear reactor physics and engineering
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Physics and Applications
- Particle Dynamics in Fluid Flows
- Advanced Materials Characterization Techniques
- Advanced materials and composites
- Atomic and Molecular Physics
- Rare-earth and actinide compounds
- Superconducting Materials and Applications
- Mass Spectrometry Techniques and Applications
- Multiferroics and related materials
- Advanced Thermoelectric Materials and Devices
- Ionosphere and magnetosphere dynamics
- Aluminum Alloy Microstructure Properties
Uppsala University
2014-2024
KTH Royal Institute of Technology
2014-2024
Royal Military Academy
2020
Karolinska Institutet
2020
Abstract Ion accelerators have demonstrated tremendous versatility in their research applications throughout several decades. Starting predominantly as nuclear physics tools, they subsequently provided novel insights into fundamental atomic physics. Nowadays small and medium size are routinely employed branches of materials science. As questions increasingly drive the need for analyses material modification experiments performed in-situ and/or in-operando, facilities must adapt to service...
High-entropy materials represent the state-of-the-art on alloy design strategy for future applications in extreme environments. Recent data indicates that high-entropy alloys (HEAs) exhibit outstanding radiation resistance face of existing diluted counterparts due to suppressed damage formation and evolution. An extension HEA concept is presented this paper towards synthesis characterization novel ceramics as emergent application environments where energetic particle irradiation a major...
A dedicated detector system for heavy ion elastic recoil detection analysis at the Tandem Laboratory of Uppsala University is presented. Benefits combining a time-of-flight measurement with segmented anode gas ionization chamber are demonstrated. The capability species identification improved present system, compared to that obtained when using single solid state silicon full energy signal. enables separation light elements, up Neon, based on atomic number while signals from elements such as...
Chalcogenide perovskites are being considered for various energy conversion applications, not least photovoltaics. BaZrS3 stands out its highly stable, earth-abundant, and nontoxic nature. It exhibits a very strong light–matter interaction an ideal band gap top subcell in two-junction photovoltaic device. So far, thin-film synthesis─necessary proper optoelectronic characterization as well device integration─remains underdeveloped. Sputtering has been considered, among others, but the need...
In an effort to support the large-scale implementation of clean hydrogen in industry and society, electrolytic decomposition water is considered a realistically enticing prospect, provided guarantee affordable durable material components. Within alkaline systems, earth-abundant electrocatalysts could provide both these requirements. However, continued exploration reactivity causes behind different behaviors performance are necessary guide optimization design. this paper, Ta-doped NiO thin...
ZrN formation in a Zr-based bulk metallic glass is observed after processing using reactive laser powder bed fusion. Two routes employing nitrogen as process gas are explored: (1) Standard inert argon followed by remelting and (2) nitrogen. Incorporation of depth-dependent both approaches result dispersion nanocrystals the amorphous matrix close to surface. The parameters can be adjusted control volume fraction crystalline phases formed. Hence, it shown that additive manufacturing utilised...
Surface segregation and diffusion of W, Ta, Cr, O S after thermal annealing EUROFER97 were studied in-situ. The sample was prepared by polishing, up to 300°C 3 keV Ar sputtering. In-situ measurements with time-of-flight low energy ion scattering using 8 Ne ions Auger electron spectroscopy carried out close room temperature each annealing, in sequence, 425°C, 675°C, 400°C, 900°C, 925°C. segregation/diffusion chromium tungsten and/or tantalum can be observed the spectra. sulfur clearly...
The identification of the sources atomic tungsten and measurement their radiation distribution in front all plasma-facing components has been performed JET with help two digital cameras same two-dimensional view, equipped interference filters different bandwidths centred on W I (400.88 nm) emission line. A new algorithm for subtraction continuum was successfully developed is now used to evaluate erosion even inner divertor region where strong recombination dominating over emission. Analysis...
Sputter-deposited thin films (33–1160 nm) from EUROFER97 were obtained on different substrates (C, Si, W, MgO) in argon and a mix of deuterium atmosphere. The composition, microstructure, mechanical properties the analyzed compared to those bulk material. feature lower density (-10%), higher hardness (+79%), smaller crystallites comparison bulk. Despite such differences, elemental atomic composition was very similar, as determined by ion beam analysis. Deposition deuterium-containing...
Single crystals of CaF2, cleaved along the (1 1 1) plane, were irradiated by 35Cl, 39K, 52Cr, 58Ni, 79Br and 197Au ions with energies from 2 to 48 MeV, charge states 1+ 11+ ion fluences × 1010 1013 ions/cm2. The surface properties samples studied using Atomic Force Microscopy in contact mode. Nanoscale structures observed for some surfaces Cl, K, Cr, Ni, Br Au ions. Thresholds nanostructure formation found terms projectile velocity electronic stopping power (Se). Clear modification was...
When electrocatalysts are prepared, modification of the morphology is a common strategy to enhance their electrocatalytic performance. In this work, we have examined and characterized nanorods (3D) nanosheets (2D) nickel molybdate hydrates, which previously been treated as same material with just variation in morphology. We thoroughly investigated materials report that they contain fundamentally different compounds crystal structures, chemical compositions, stabilities. The 3D nanorod...
Postsynthetic, position‐selective addition of properties to materials constitutes a paradigm shifting step in engineering. The approach enables creation material systems inaccessible by equilibrium and near‐equilibrium synthesis can be applied novel practical applications as well fundamental physics studies over range length energy scales. Ion implantation is versatile, scalable, industry‐compatible tool, enabling the next this development. Herein, ion used design functionalize mesoscopic...
We present a method for the additive fabrication of planar magnetic nanoarrays with minimal surface roughness. Synthesis is accomplished by combining electron-beam lithography, used to generate nanometric patterned masks, ion implantation in thin films. By implanting 56Fe+ ions, we are able introduce functionality controlled manner into continuous Pd films, achieving 3D spatial resolution down few tens nanometers. Our results demonstrate application this technique fabricating square...
Abstract Polyimide films of thickness 7.5 µm are irradiated by a wide range ions ( 1 H to 197 Au) with energies between 1.05 and 48 MeV. Irradiated samples then chemically etched in sodium hypochlorite solution investigate nanopore formation due ion track etching. A threshold terms electronic stopping power, S et , needs be surpassed preferentially etch the tracks. Close intermittent tracks formed where only part is etchable. The fraction these etchable parts increases as we move away from...
Surface compositional changes of iron-tungsten films by deuterium (D) ion bombardment were studied means medium energy scattering, elastic recoil detection analysis and Rutherford backscattering spectrometry. The the bombarding ions was 200 eV/D fluence varied from 1021 D/m2 to 1024 D/m2. A significant increase tungsten concentration within 20 nm closest sample surface, caused preferential sputtering iron, seen for exposed 1023 or more. In highest fluence, D/m2, increased an initial 1.7 at....
The work presents results of a broad TEXTOR dust survey in terms its composition, structure, distribution and fuel content. particles were collected after final shutdown December 2013. Fuel retention, as determined by thermal desorption, varied significantly, even two orders magnitude, dependent on the location machine. Dust structure was examined means scanning electron microscopy combined with energy-dispersive x-ray spectroscopy, focused ion beam transmission microscopy. Several...
We have deposited polycrystalline Re doped $(Fe_{65}Co_{35})_{100-x}Re_{x}$ (0 $\leq$ x 12.6 at\%) thin films grown under identical conditions and sandwiched between layers of Ru in order to study the phenomenon spin pumping as a function concentration. In-plane out-of-plane ferromagnetic resonance spectroscopy results show an enhancement Gilbert damping with increase doping. found evidence real part effective mixing conductance [Re($g^{\uparrow\downarrow}_{eff}$)] doping 6.6 at\%, while...
The energy loss of iodine ions at initial charge states up to 25+ and energies 36 MeV in self-supporting gold foils between 37 107 nm thickness was measured with an electron mirror type time-of-flight detector. An excess 130 keV observed for state compared 16+, deficit 100 8+. equilibration length 36-MeV estimated lie 3 7 nm, corresponding time 0.4 0.9 fs. This result is relevant both nanostructure fabrication ion beams depth profiling based on beam analysis data cases where the primary far...
Tungsten surface enrichment of EUROFER steel by 250 eV deuterium sputtering is in-situ measured using low energy He+ ion scattering spectroscopy. The samples are irradiated at various temperatures between 300 K and 800 with a atom flux 2 × 1018 m−2s−1 maximum fluence up to 1.1 1023 m−2. measurements room temperature show clear increase tungsten density, but already 520 the observed only half as large. At no detectable. obtained data yield an upper limit 1.6 for diffusion activation in EUROFER.