A5039157918- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- High-pressure geophysics and materials
- Quantum, superfluid, helium dynamics
- Nuclear reactor physics and engineering
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Neutrino Physics Research
- Diamond and Carbon-based Materials Research
- Particle accelerators and beam dynamics
- Force Microscopy Techniques and Applications
- Advanced Surface Polishing Techniques
Technical University of Denmark
2021-2024
AlbaNova
2023
KTH Royal Institute of Technology
2023
European Spallation Source
2023
Universidade Federal Fluminense
2023
Nagoya University
2021
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...
Abstract 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.
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,...
Nanodiamonds have attracted attention in recent years for their exceptional albedo of slow neutrons. Several theoretical models been proposed to compute the total elastic cross section. However, these neglect relatively complex internal structure and chemical composition diamond nanoparticles, relying often on monodisperse structureless spheres approximation. In this work, we explore possibility adding small-angle neutron scattering (SANS) process nanodiamonds NCrystal, a library that...
We present recent developments of improved modelling methods for simulating neutron transport in reflector materials interest source applications. These include to be used as traditional reflectors around the moderator, such beryllium, and also novel materials, nanodiamond particles, a very-cold neutrons beam extraction area scattering instrument. Of particular is inclusion physical effects that are not modelled standard thermal libraries Monte-Carlo simulations, extinction beryllium...
The European Spallation Source (ESS), presently under construction in Lund, Sweden, is a multidisciplinary international laboratory that, once completed at full specifications, will operate the world's most powerful pulsed neutron source. Supported by 3 M Euro Research and Innovation Action within Union Horizon 2020 program, design study (HighNESS) now underway to develop second source located below spallation target. Compared first source, which above target designed for high cold thermal...
The goal of the “Workshop on Very Cold and Ultra Neutron Sources for ESS” was to discuss scientific cases, ideas possibilities implementation sources neutrons at European Spallation Source. ESS facility, presently under construction, offers several in-pile UCN or VCN sources, in primis thanks available space below spallation target where additional neutron can be placed complement those above target. beams extracted over a wide angular range with grid forty-two beamports 6° average...
This paper discusses design principles and possible performances of an “in-beam” ultracold neutron (UCN) source for the European Spallation Source (ESS). The key components proposed delivery system are nested-mirror optics (NMO), which image bright emission surface large liquid-deuterium moderator, studied within HighNESS project, onto a remotely located superfluid-helium converter. Bandpass supermirrors, with optional polarization capability, enable selective transport those neutrons that...
Abstract In the course of Horizon 2020 project HighNESS, a second moderator concept has been developed for European Spallation Source, which complements currently built and is optimized high intensity with large viewable surface area. this work we introduce conceptual designs neutron instruments condensed matter research designed to make optimal use capabilities moderator. The focus on two concepts small-angle scattering one imaging instrument, are intended complement corresponding that...
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 program is a proposed two-stage experiment at the European Spallation Source focusing on searches for baryon number violation via processes in which neutrons convert to antineutrons. This paper outlines computing and detector simulation framework program. based predictions of neutron flux neutronics together with signal background generation. A range diverse packages are incorporated, including Monte Carlo transport codes, ray-tracing packages, software. common package these...
The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with an expected sensitivity improvement of three orders magnitude compared last such search. This paper describes both simulations a key component experiment, neutron optical reflector and gains in sensitivity.
The European Spallation Source, which is under construction in Lund, Sweden, aims to be the world's brightest source of neutrons. During first phase construction, users will have access a suite 15 instruments, produce neutrons through butterfly-shaped moderator system located above spallation target. HighNESS project, funded by Union Horizon 2020 program, has goal providing new design for second moderator, situated below target and most intense neutron world. provide higher intensity cold,...
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...
The main, high-brightness neutron source for ESS is based on the low-dimensional moderator concept, and will serve initial suite of scattering instruments. In HighNESS project several design options have been identified investigated a second ESS, intended to be complementary primary one. emphasis this project, completed in September 2023, was high-intensity sources, delivering Cold, Very Cold (VCN), Ultra-Cold Neutrons (UCN). Remarkable results include: cold liquid deuterium capable an...
<title>Abstract</title> In the course of Horizon 2020 project HighNESS, a second moderator concept has been developed for European Spallation Source which complements currently built and is optimized high intensity with large viewable surface area. this work we introduce conceptual designs neutron instruments condensed matter research designed to make optimal use capabilities moderator. The focus on two concepts small-angle scattering one imaging instrument, are intended complement...