Peter Majewski
A5091643204- Physics of Superconductivity and Magnetism
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Magnetic and transport properties of perovskites and related materials
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Advanced Condensed Matter Physics
- Radiation Detection and Scintillator Technologies
- Superconductivity in MgB2 and Alloys
- Superconducting Materials and Applications
- High-pressure geophysics and materials
- Microwave Dielectric Ceramics Synthesis
- CCD and CMOS Imaging Sensors
- Extraction and Separation Processes
- Polymer Surface Interaction Studies
- Catalytic Processes in Materials Science
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Iron-based superconductors research
- Thermal Expansion and Ionic Conductivity
- Surface Modification and Superhydrophobicity
- Recycling and Waste Management Techniques
- Inorganic Fluorides and Related Compounds
PNDetector (Germany)
2023-2024
Rutherford Appleton Laboratory
2009-2023
University of South Australia
2014-2023
Technical University of Munich
2018
PNSensor (Germany)
2009-2017
Kavli Institute for Particle Astrophysics and Cosmology
2017
Stanford University
2017
SLAC National Accelerator Laboratory
2017
University of Alberta
2016
Great Lakes Institute of Management
2015
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory Network), a proposed programme using cold strontium atoms to search for ultra-light dark matter, explore gravitational waves in mid-frequency range between peak sensitivities LISA LIGO/Virgo/ KAGRA/INDIGO/Einstein Telescope/Cosmic Explorer experiments, probe other frontiers fundamental physics. would complement planned searches as well mergers involving intermediate-mass black holes...
LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using two-phase xenon detector with an active mass of 7 tonnes, LZ search primarily for low-energy interactions weakly interacting massive particles (WIMPs), which are hypothesized to make up our galactic halo. In this paper, projected WIMP sensitivity presented based on latest background estimates...
DEAP-3600 is a single-phase liquid argon (LAr) direct-detection dark matter experiment, operating 2 km underground at SNOLAB (Sudbury, Canada). The detector consists of 3279 kg LAr contained in spherical acrylic vessel. This paper reports on the analysis $758\text{ }\text{ }\mathrm{tonne}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{day}$ exposure taken over period 231 live-days during first year operation. No candidate signal events are observed WIMP-search region interest, which...
he structural, transport, magnetic and optical properties of the double perovskite $A_2$CrWO$_6$ with $A=\text{Sr, Ba, Ca}$ have been studied. By varying alkaline earth ion on $A$ site, influence steric effects Curie temperature $T_C$ saturation magnetization has determined. A maximum $T_C=458$ K was found for Sr$_2$CrWO$_6$ having an almost undistorted structure a tolerance factor $f\simeq 1$. For Ca$_2$CrWO$_6$ Ba$_2$CrWO$_6$ structural changes result in strong reduction $T_C$. Our study...
Nanotechnology has generated tremendous hopes in recent years toward the design of advanced functional materials, especially bio-medical field. Nano-sized-materials such as magnetite nanoparticles display indeed fascinating physico-chemical properties that, if tuned properly, can be exploited to new bio-diagnostic and therapeutic strategies well innovative biotechnology methodologies. Owing their biocompatibility excellent magnetic properties, nanocrystals have been object a amount research...
The ZEPLIN-III experiment in the Palmer Underground Laboratory at Boulby uses a 12 kg two-phase xenon time-projection chamber to search for weakly interacting massive particles (WIMPs) that may account dark matter of our Galaxy. detector measures both scintillation and ionization produced by radiation liquid differentiate between nuclear recoils expected from WIMPs electron-recoil background signals down $\ensuremath{\sim}10\text{ }\text{ }\mathrm{keV}$ nuclear-recoil energy. An analysis...
We report experimental upper limits on WIMP-nucleon elastic scattering cross sections from the second science run of ZEPLIN-III at Boulby Underground Laboratory. A raw fiducial exposure 1344 kg⋅days was accrued over 319 days continuous operation between June 2010 and May 2011. total eight events observed in signal acceptance region nuclear recoil energy range 7–29 keV, which is compatible with background expectations. This allows exclusion scalar cross-section above 4.8×10−8 pb near 50...
Rather than using graphene oxide, which is limited by a high defect concentration and cost due to oxidation reduction, we adopted cost-effective, 3.56 nm thick platelets (GnPs) of structural integrity melt compound with an elastomer-ethylene-propylene-diene monomer rubber (EPDM)-using industrial facility. An elastomer amorphous, chemically crosslinked polymer generally having rather low modulus fracture strength but strain in comparison other materials; upon removal loading, it able return...
Carbon nanomaterials including carbon black (CB), nanotubes (CNTs) and graphene have attracted increasingly more interest in academia due to their fascinating properties. These can significantly improve the mechanical, electrical, thermal, barrier, flame retardant properties of elastomers. The improvements are dependent on molecular nature matrix, intrinsic property, geometry dispersion fillers, interface between matrix fillers. In this article, we briefly described fabrication processes...
Polyaniline (PANi)/graphene nanocomposites have attracted tremendous interest because of their great potential in electrochemical energy storage applications, especially supercapacitors. We herein focus on the composite synthesis, device fabrication and particularly various techniques for improvement performance. It is imperative to take close control interface these nanostructured composites, which thus would lead desired synergistic effects cyclic stability with efficient diffusion...
This Letter reports the first results of a direct dark matter search with DEAP-3600 single-phase liquid argon (LAr) detector. The experiment was performed 2 km underground at SNOLAB (Sudbury, Canada) utilizing large target mass, LAr contained in spherical acrylic vessel 3600 kg capacity. is viewed by an array PMTs, which would register scintillation light produced rare nuclear recoil signals induced particle scattering. An analysis 4.44 live days (fiducial exposure 9.87 ton day) data taken...
Powder compositions of LaGaO 3 , La 0.9 Sr 0.1 GaO 2.95 and 0.8 0.2 Ga 0.83 Mg 0.17 O 2.815 were prepared via a Pechini‐type process that uses citric acid ethylene glycol. The calcination behavior the precursor powders above‐mentioned phases was studied in temperature range 200°–1400°C an air atmosphere. Characterization powder samples performed using several processes, including X‐ray diffractometry, thermogravimetry/differential thermal analysis, Fourier transform infrared spectroscopy,...
Gallium oxide hydroxide (GaOOH· x H 2 O) single crystals were synthesized in aqueous solutions by using two different precipitation techniques: homogeneous decomposition of urea and forced hydrolysis pure water. Precipitation started at exactly the same pH value (i.e., 2.05 85°C) both cases. The morphology turned out to be quite (zeppelin‐like with urea, rodlike without urea) each above methods. Calcination these gallium air temperatures ≥500°C transformed them into Ga O 3 . Characterization...
We report the first measurements of absolute ionization yield nuclear recoils in liquid xenon, as a function energy and electric field. Independent experiments were carried out with two dual-phase time-projection chamber prototypes, developed for XENON dark matter project. find that charge increases decreasing recoil energy, exhibits only weak field dependence. These results are unambiguous demonstration capability xenon detectors to discriminate between electron down 20 keV, key requirement...
In recent years, functionalized hydrophobic materials have attracted considerable interest as oil removal agents. This investigation has applied plasma polymerization a novel method to develop and oleophilic particles for water purification. 1,7-Octadiene was polymerized onto silica using radio frequency inductively coupled reactor fitted with rotating chamber. Plasma 1,7-octadiene (ppOD) films were deposited power of 40 W monomer flow rate 2 sccm, while time varied from 5 60 min. The...