A5089906692- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- MXene and MAX Phase Materials
- Metal and Thin Film Mechanics
- Advanced materials and composites
- 2D Materials and Applications
- Aluminum Alloys Composites Properties
- Radiation Therapy and Dosimetry
- Boron and Carbon Nanomaterials Research
- Advanced ceramic materials synthesis
- Diamond and Carbon-based Materials Research
- Nuclear reactor physics and engineering
- Magnetic properties of thin films
- Fullerene Chemistry and Applications
- Photocathodes and Microchannel Plates
- Ion-surface interactions and analysis
- Graphene research and applications
- Engineering Applied Research
- Advanced Sensor and Control Systems
- GaN-based semiconductor devices and materials
- Ferroelectric and Negative Capacitance Devices
- Superconducting Materials and Applications
- Intermetallics and Advanced Alloy Properties
- Atomic and Subatomic Physics Research
European Spallation Source
2018-2024
Linköping University
2015-2022
Thinfilm (Sweden)
2015-2020
We report the discovery of a new hexagonal Mo2Ga2C phase, wherein two Ga layers – instead one are stacked in simple arrangement between Mo2C layers. It is reasonable to assume this compound first larger family.
Incorporation of layers noble metals in non-van der Waals layered materials may be used to form novel compounds. Recently, we demonstrated a high-temperature-induced exchange process Au with Si the phase Ti3SiC2, resulting formation Ti3AuC2 and Ti3Au2C2. Here, generalize this technique showing that Au/Ti2AlC Au/Ti3AlC2 undergo an reaction at 650 °C Ti2Au2C Ti3Au2C2 determine their structures by electron microscopy, X-ray diffraction, ab initio calculations. These results imply...
Au-containing nanolaminated carbides Mo<sub>2</sub>AuC and Mo<sub>2</sub>(Au<sub>1−x</sub>Ga<sub>x</sub>)<sub>2</sub>C were synthesized by a thermally induced substitutional reaction in Mo<sub>2</sub>GaC Mo<sub>2</sub>Ga<sub>2</sub>C, respectively.
The magnetic properties of the new phase (Cr0.5Mn0.5)2AuC are compared to known MAX-phase (Cr0.5Mn0.5)2GaC, where former was synthesized by thermally induced substitution reaction Au for Ga in (Cr0.5Mn0.5)2GaC. introduced a lattice expansion ∼3% along c-axis, an enhancement coercive field from 30 mT 140 mT, and reduction Curie temperature saturation magnetization. Still, displays similar features field- temperature-dependent magnetization curves as previously reported MAX phases, e.g.,...
The first Fe-based MAX phase is realized by solid-state substitution reaction of an Fe/Au/Mo2GaC thin-film diffusion couple, as determined X-ray diffraction and scanning transmission electron microscopy. Chemical analysis together with elemental mapping reveals that much 50 at.% Fe on the A site can be obtained thermally induced Au for Ga atomic layers in Mo2GaC. One-sixth original also replaced atoms. When annealing Mo2GaC thin films covered only, remains intact, is, acts a catalyst...
Amorphous boron carbide (B4C) thin films are by far the most popular form for neutron converting layers in 10B-based detectors, which a rising trend detector technologies response to increasing scarcity and price of 3He, standard material detection. The microstructure B4C is closely related important properties, e.g. density adhesion, layers, eventually affect detection efficiency long-term stability detectors. To study influence from substrates different roughness materials, were deposited...
Thermally induced intercalation of noble metals into non-van der Waals ceramic compounds presents a method to produce new class layered materials. We recently demonstrated an exchange reaction Au with A layers MAX phase carbides plentiful combinations and M elements. Here, we report the first substitution Al in Ti2AlN nitride at elevated temperature without destroying original structure. These results bolster generalization for elements phases diverse M, A, X Furthermore, propose crucial...
We deposit CSx thin solid films by reactive direct current magnetron sputtering of a C target in an argon plasma, using carbon disulfide (CS2) as precursor to film growth. investigate the influence partial pressure CS2 vapor introduced into plasma on composition, chemical bonding structure, structural, and mechanical properties determined x-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM), nanoindentation for deposited at 150 300 °C. The XPS...
Abstract Neutron spallation sources always require new instrument upgrades and innovations in order to improve the quality of their experiments. In this framework, capability accurately measure total neutron cross sections at VESUVIO ISIS Facility can be boosted by a tailored transmission detector. For reason, first double ceramic thick GEM detector has been realised. Detectors based on technology are broadly developed thanks characteristics, such as good spatial resolution (< 0.5 mm),...
The Multi-Blade is a Boron-10-based neutron detector designed for reflectometers and developed the two instruments (Estia FREIA) planned European Spallation Source in Sweden. A demonstrator has been installed at AMOR reflectometer Paul Scherrer Institut (PSI—Switzerland). exploits Selene guide concept can be considered scaled-down of Estia. results these tests are discussed. It will shown how characteristics features that allow focusing reflectometry operation mode. Additionally performance...
A theoretical and experimental study on the growth properties of a ternary carbon-based material, CS x F y , synthesized from SF6 C as primary precursors is reported. The synthetic concept was applied to model possible species resulting fragmentation molecules recombination S-F fragments with atomic C. were further evaluated for their contribution film growth. Corresponding solid thin films deposited by reactive direct current magnetron sputtering target in mixed Ar/SF6 discharge different...
A new carbon-based compound: CSxFy is reported. Geometry optimizations and energy calculations were performed by density functional theory on graphene-like model systems containing sulfur fluorine atoms. It shown that for [S + F] concentrations in the range of 0–10 at. %, short-range ordered structural characteristics similar to graphene pieces ring defects are energetically favorable. The modeling predicts exhibiting graphite fullerene-like may be synthesized mentioned concentration range....
Silicon neutron detectors can operate at low voltage and come with ease of fabrication the possibility integration readout electronics thus are attractive from an application point view. In this paper, we have studied thermal capture by silicon diodes coated boron carbide (B4C). One surfaces was covered either natural B4C (natB4C) or enriched (enB4C). We investigated: (a) effect increase in sensitive area surface diode on detection efficiency (b) enrichment 10B B4C. The difference natB4C (16...
Abstract A new position-sensitive thermal neutron detector based on boron-coated converters has been developed as an alternative to today’s standard $$^3\mathrm{He}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mrow/> <mml:mn>3</mml:mn> </mml:msup> <mml:mi>He</mml:mi> </mml:mrow> </mml:math> -based technology for application scattering. The key elements of the development are GEM foils (Sauli in Nucl Instrum Methods Phys Res Sect Accel Spectrom Detect...
Abstract Neutron detection is of great importance in many fields spanning from scientific research, to nuclear science, and medical application. The development silicon-based neutron detectors with enhanced efficiency can offer several advantages such as spatial resolution, dynamic range background discrimination. In this work, increased pursued by fabricating high aspect ratio 3D micro-structures filled converting materials (B 4 C) on planar silicon detectors. An in-depth feasibility study...
An increasingly unstable supply of <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> He in the past decade along with growing demands for detectors from large-scale neutron facilities have led to a higher focus on developing not relying He. In this study superconducting transition edge sensor (TES) based stack thin films is combined absorbing layer xmlns:xlink="http://www.w3.org/1999/xlink">10</sup> B <sub...
The Multi-Blade (MB) Boron-10-based neutron detector is the chosen technology for three instruments at European Spallation Source (ESS): two ESS reflectometers, ESTIA and FREIA, Test Beam Line. A fourth MB has been built, installed commissioned user operation of reflectometer Amor PSI (Switzerland). can be considered a downscaled version ESTIA. They are based on same Selene guide concept, optimized performing focusing reflectometry small samples. experience gained invaluable future...
The development of detectors for the European Spallation Source is an important parallel element to effort put into design and construction neutron source instruments. 10Boron-film-based detector developments that started over a decade ago as basic concepts have now reached technical maturity after intense prototyping work numerous testing campaigns. Several ESS beamlines will soon enter commissioning phase welcoming systems built with 10B-film converter technology. real-size demonstrators...
Abstract The Multi-Blade (MB) Boron-10-based neutron detector is the chosen technology for three instruments at European Spallation Source (ESS): two ESS reflectometers, ESTIA and FREIA, Test Beam Line. A fourth MB has been built, installed commissioned user operation of reflectometer Amor PSI (Switzerland). can be considered a downscaled version ESTIA. They are based on same Selene guide concept, optimized performing focusing reflectometry small samples. experience gained invaluable future...
In the framework of ATTRACT-uRANIA project, funded by European Community, we are developing an innovative neutron imaging detector based on micro-Resistive WELL (μ-RWELL) technology. The μ-RWELL, resistive concept, ensuring efficient spark quenching mechanism, is a highly reliable device. It composed two main elements: readout-PCB and cathode. amplification stage for this device embedded in readout board through layer realized means industrial process with DLC (Diamond-Like Carbon). A thin...