W. Van De Pontseele
A5057119000- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Superconducting and THz Device Technology
- Computational Physics and Python Applications
- Quantum Chromodynamics and Particle Interactions
- Atmospheric Ozone and Climate
- Calibration and Measurement Techniques
- Quantum, superfluid, helium dynamics
- Meteorological Phenomena and Simulations
- Video Analysis and Summarization
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Data Storage Technologies
- Inorganic Fluorides and Related Compounds
- Adversarial Robustness in Machine Learning
- Radio Frequency Integrated Circuit Design
- Physics of Superconductivity and Magnetism
Massachusetts Institute of Technology
2021-2025
Colorado School of Mines
2025
University of Washington
2024
Johannes Gutenberg University Mainz
2024
Université Paris-Saclay
2023
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2023
Institut National de Physique Nucléaire et de Physique des Particules
2023
Centre National de la Recherche Scientifique
2023
University of Oxford
2017-2022
Harvard University Press
2019-2022
The absolute scale of the neutrino mass plays a critical role in physics at every scale, from subatomic to cosmological. Measurements tritium end-point spectrum have provided most precise direct limit on scale. In this Letter, we present advances by Project 8 cyclotron radiation emission spectroscopy (CRES) technique culminating first frequency-based limit. With only cm^{3}-scale physical detection volume, m_{β}<155 eV/c^{2} (152 eV/c^{2}) is extracted background-free measurement continuous...
Abstract The future Ricochet experiment aims to search for new physics in the electroweak sector by measuring Coherent Elastic Neutrino-Nucleus Scattering process from reactor antineutrinos with high precision down sub-100 eV nuclear recoil energy range. While collaboration is currently building experimental setup at site, it also finalizing cryogenic detector arrays that will be integrated into cryostat Institut Laue Langevin early 2024. In this paper, we report on recent progress Ge...
Abstract The future Ricochet experiment aims at searching for new physics in the electroweak sector by providing a high precision measurement of Coherent Elastic Neutrino-Nucleus Scattering (CENNS) process down to sub-100 eV nuclear recoil energy range. will deploy kg-scale low-energy-threshold detector array combining Ge and Zn target crystals 8.8 m away from 58 MW research reactor core Institut Laue Langevin (ILL) Grenoble, France. Currently, Collaboration is characterizing backgrounds its...
Neutrino mass is a key parameter in nuclear and particle physics cosmology. The Project 8 Collaboration developed an innovative method with potential to improve the current limits by more than order of magnitude. Announced paper published last September (PRL 131, 102502; see also Synopsis at https://physics.aps.org/articles/v16/s121), measures frequency radiation from tritium $\ensuremath{\beta}$-decay electrons spiraling magnetic field. In authors provide details this unique measurement...
Measurements of the $\beta^-$ spectrum tritium give most precise direct limits on neutrino mass. Project 8 will investigate mass using Cyclotron Radiation Emission Spectroscopy (CRES) with an atomic source. CRES is a new experimental technique that has potential to surmount systematic and statistical limitations current-generation measurement methods. Atomic avoids irreducible uncertainty associated final states populated by decay molecular tritium. proceed in phased approach toward goal 40...
A calorimetric detector for minimally disruptive measurements of atomic hydrogen beams is described. The calorimeter measures heat released by the recombination atoms into molecules on a thin wire. As demonstration, angular distribution beam with peak intensity $\approx 10^{16} \,{\rm{atoms}}/{(\rm{cm}^2 \rm{s})}$ measured translating wire across beam. data agree well an analytic model from thermal atom source. Using shape model, relative can be determined to 5% precision or better at any angle.
The most sensitive direct neutrino mass searches today are based on measurement of the endpoint beta spectrum tritium to infer limits unobserved recoiling neutrino. To avoid smearing associated with distribution molecular final states in T-He molecule, next generation these experiments will need employ atomic (T) rather than (T$_{2}$) sources. Following production, T can be trapped gravitational and / or magnetic bottles for experiments, if only it first cooled millikelvin temperatures....
Quantum information processing at scale will require sufficiently stable and long-lived qubits, likely enabled by error-correction codes. Several recent superconducting-qubit experiments, however, reported observing intermittent spatiotemporally correlated errors that would be problematic for conventional codes, with ionizing radiation being a cause. Here, we directly measured the cosmic-ray contribution to qubit errors. We accomplished this synchronously monitoring detectors...
Abstract Cyclotron Radiation Emission Spectroscopy (CRES) is a technique for measuring the kinetic energy of charged particles through precision measurement frequency cyclotron radiation generated by particle's motion in magnetic field. The Project 8 collaboration developing next-generation neutrino mass experiment based on CRES. One approach to use phased antenna array, which surrounds volume tritium gas, detect and measure resulting β-decay electrons. To validate feasibility this method,...
The objective of the Cyclotron Radiation Emission Spectroscopy (CRES) technology is to build precise particle energy spectra. This achieved by identifying start frequencies charged trajectories which, when exposed an external magnetic field, leave semi-linear profiles (called tracks) in time-frequency plane. Due need for excellent instrumental resolution application, highly efficient and accurate track reconstruction methods are desired. Deep learning convolutional neural networks (CNNs) -...
We present the characterization of cosmogenic muon backgrounds for Colorado Underground Research Institute (CURIE), located in Edgar Experimental Mine (EEM) Idaho Springs, Colorado. The CURIE facility at EEM offers a versatile shallow underground environment, with accessible horizontal tunnel access and stable rock formations ideal low-background physics experiments. have measured total flux two locations, Site 0 1, yielding values $\phi$ = 0.246 $\pm$ 0.020$_{sys.}$ 0.012$_{stat.}$ 0.239...
Abstract The objective of the cyclotron radiation emission spectroscopy (CRES) technology is to build precise particle energy spectra. This achieved by identifying start frequencies charged trajectories which, when exposed an external magnetic field, leave semi-linear profiles (called tracks) in time–frequency plane. Due need for excellent instrumental resolution application, highly efficient and accurate track reconstruction methods are desired. Deep learning convolutional neural networks...
Abstract Cyclotron Radiation Emission Spectroscopy (CRES) is a technique for precision measurement of the energies charged particles, which being developed by Project 8 Collaboration to measure neutrino mass using tritium beta-decay spectroscopy. seeks use CRES with sensitivity 40 meV, requiring large supply atoms stored in multi-cubic meter detector volume. Antenna arrays are one potential technology compatible an experiment this scale, but capability antenna-based depends on efficiency...
Abstract Cyclotron radiation emission spectroscopy (CRES) is a modern approach for determining charged particle energies via high-precision frequency measurements of the emitted cyclotron radiation. For CRES experiments with gas within fiducial volume, signal and noise dynamics can be modelled by hidden Markov model. We introduce novel application Viterbi algorithm in order to derive informational limits on optimal detection signals this class gas-filled experiments, thereby providing...
A laboratory set-up has been developed to more precisely measure the DOM optical sensitivity as a function of angle and wavelength. DOMs are calibrated in water using broad beam light whose intensity is measured with NIST photodiode. This study will refine current knowledge IceCube response lay foundation for future precision upgrades detector. Good understanding photodiode readout indispensable calibration. Corrections measurements due amplifier circuit were investigated. To accomplish...
Project 8 has developed a novel technique, Cyclotron Radiation Emission Spectroscopy (CRES), for direct neutrino mass measurements. A CRES-based experiment on the beta spectrum of tritium been carried out in small-volume apparatus. We provide detailed account experiment, focusing systematic effects and analysis techniques. In Bayesian (frequentist) analysis, we measure endpoint as $18553^{+18}_{-19}$ ($18548^{+19}_{-19}$) eV set upper limits 155 (152) (90% C.L.) mass. No background events...
<title>Abstract</title> Coherent elastic neutrino-nucleus scattering (CEvNS) offers a valuable approach in searching for physics beyond the Standard Model. The Ricochet experiment aims to perform precision measurement of CEvNS spectrum at Institut Laue–Langevin nuclear reactor with cryogenic solid-state detectors. plans employ an array thermal detectors, each mass around 30 g and energy threshold sub-100 eV.The includes nine detectors read out by Transition-Edge Sensors (TES). These TES...
Coherent elastic neutrino-nucleus scattering (CE$\nu$NS) offers a valuable approach in searching for physics beyond the Standard Model. The Ricochet experiment aims to perform precision measurement of CE$\nu$NS spectrum at Institut Laue-Langevin nuclear reactor with cryogenic solid-state detectors. plans employ an array thermal detectors, each mass around 30 g and energy threshold sub-100 eV. includes nine detectors read out by Transition-Edge Sensors (TES). These TES based will also serve...