D. Milstead
A5101787096- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Computational Physics and Python Applications
Stockholm University
2011-2024
Uppsala University
2024
Institute of Physics
2023
Jagiellonian University
2023
The University of Adelaide
2017-2019
AGH University of Krakow
2018
Brookhaven National Laboratory
2012-2016
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
The MoEDAL experiment is designed to search for magnetic monopoles and other highly-ionising particles produced in high-energy collisions at the LHC. largely passive detector, deployed Interaction Point 8 on LHC ring, relies two dedicated direct detection techniques. first technique based stacks of nucleartrack detectors with surface area ~18m2, sensitive particle ionisation exceeding a high threshold. These are analysed offline by optical scanning microscopes. second trapping charged an...
Exotic stable massive particles (SMP) are proposed in a number of scenarios physics beyond the Standard Model. It is important that LHC experiments able both to detect and extract quantum numbers any SMP with masses around TeV scale. To do this, an understanding interactions SMPs matter required. In this paper Regge-based model R-hadron scattering extended implemented Geant-4. addition, implications $R$-hadron for collider searches discussed.
The European Spallation Source being constructed in Lund, Sweden will provide the user community with a neutron source of unprecedented brightness. By 2025, suite 15 instruments be served by high-brightness moderator system placed above spallation target. ESS infrastructure, consisting proton linac, target station, and instrument halls, allows for implementation second below We propose to develop high-intensity able (1) deliver larger total cold flux, (2) high intensities at longer...
If produced in high energy particle collisions at the LHC, magnetic monopoles could stop material surrounding interaction points. Obsolete parts of beam pipe near CMS region, which were exposed to products pp and heavy ion collisions, analysed using a SQUID-based magnetometer. The purpose this work is quantify performance magnetometer context monopole search small set samples accelerator ahead 2013 shutdown.
A key aim of the HighNESS project for European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report NNBAR experiment. would exploit new cold lower moderator make first search in over thirty years free neutrons converting anti-neutrons. The observation such baryon-number-violating signature be fundamental significance and tackle open questions modern physics, including origin matter-antimatter asymmetry. shows beamline,...
The goal of the HIBEAM/NNBAR program is to search for baryon number violation via conversion or oscillation neutrons into sterile and/or antineutrons at European Spallation Source. A key experimental component construction an annihilation detector directly observe production antineutron following oscillation. Design studies are presented. predicted response models studied using Geant4 simulations made with Monte Carlo signal topology and cosmic ray backgrounds. Particle identification...
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
The HIBEAM/NNBAR experiment is a free-neutron search for $n \rightarrow$ sterile $n$ and \rightarrow \bar{n}$ oscillations planned to be installed at the European Spallation Source under construction in Lund, Sweden. A key component detector identify $n-\bar{n}$ annihilation events, which will produce on average four pions with final state invariant mass of two nucleons, around $1.9\,$GeV. beamline are shielded from magnetic fields would suppress transitions, thus no momentum measurement...
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world's most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
We consider a possible neutron–antineutron (n−n¯) oscillation experiment at the PF1B instrument Institut Laue Langevin. It can improve best existing constraint on transition rate and also allow testing of methods instrumentation which would be needed for later larger-scale ESS. The main gain factors over most competitive experiment, performed earlier PF1 ILL, are: more intense neutron beam new operating mode based coherent n n¯ mirror reflections. installation such an need temporary...
A sensitive search for neutron-antineutron oscillations can provide a unique probe of some the central questions in particle physics and cosmology: energy scale mechanism baryon number violation, origin baryon-antibaryon asymmetry universe, neutrino mass generation. remarkable opportunity has emerged to such with construction European Spallation Source (ESS). collaboration been formed which proposed at ESS, would sensitivity oscillation probability is three orders magnitude greater than that...
A sensitive search for neutron-antineutron oscillations can provide a unique probe of some the central questions in particle physics and cosmology: energy scale mechanism baryon number violation, origin baryon-antibaryon asymmetry universe, neutrino mass generation. remarkable opportunity has emerged to such with construction European Spallation Source (ESS). collaboration been formed which proposed at ESS, would sensitivity oscillation probability is three orders magnitude greater than that...
Conversions between neutrons $n$ and Dark Matter candidate sterile $n'$ have been proposed as a mechanism for Baryon Number $\mathcal{B}$ violation. In the case that there is small mass difference $\Delta{m}$ states, oscillations can be induced by compensating with magnetic field. A search such neutron was performed at Spallation Neutron Source looking anomalous transmission through strongly absorbing cadmium wafer inside of $6.6$~T magnet. The approach described here saw no regenerated...
High-intensity neutron beams, such as those available at the European Spallation Source (ESS), provide new opportunities for fundamental discoveries. Here we discuss a novel Ramsey neutron-beam experiment to search ultralight axion dark matter through its coupling spins, which would cause spins rotate about velocity of neutrons relative halo. We estimate that experiments HIBEAM beamline ESS can improve sensitivity axion-neutron compared current best laboratory limits by up $2-3$ orders...
The European Spallation Source (ESS), presently under construction in Lund, Sweden, is a multidisciplinary international laboratory that will operate the world's most powerful pulsed neutron source.Supported by 3M Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) now underway to develop second source below spallation target.Compared first source, located above target designed for high cold thermal brightness, new provide higher intensity, shift...
The European Spallation Source (ESS), presently under construction in Lund, Sweden, is a multidisciplinary international laboratory that will operate the world's most powerful pulsed neutron source. Supported by 3M Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) now underway to develop second source below spallation target. Compared first source, located above target designed for high cold thermal brightness, new provide higher intensity, shift...
The HIBEAM/NNBAR experiment is a free-neutron search for $n \rightarrow$ sterile $n$ and \rightarrow \bar{n}$ oscillations planned to be installed at the European Spallation Source under construction in Lund, Sweden. A key component detector identify $n-\bar{n}$ annihilation events, which will produce on average four pions with final state invariant mass of two nucleons, around $1.9\,$GeV. beamline are shielded from magnetic fields would suppress transitions, thus no momentum measurement...
The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with a sensitivity improvement of three orders magnitude compared last such search. This paper describes progress towards conceptual design report NNBAR. moderator, neutron reflector, beamline, shielding and annihilation detector is reported. simulations used form part model which be optimisation quantification its sensitivity.
The HIBEAM and NNBAR experiments are a proposed fundamental science at the European Spallation Source, performing high precision searches for neutron conversions in several baryon number violating (BNV) channels. For simulations of beamline, new sampling method has been developed. is based on probability density evaluation duct source biasing enables entire beamline with statistics while also preserving correlations tracks.