C. Claessens
A5070900757- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Photocathodes and Microchannel Plates
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Advanced Chemical Physics Studies
- Radiation Detection and Scintillator Technologies
- Radio Astronomy Observations and Technology
- Atomic and Molecular Physics
- Magnetic confinement fusion research
- Mass Spectrometry Techniques and Applications
- High-Energy Particle Collisions Research
- Nuclear reactor physics and engineering
University of Washington
2022-2024
Johannes Gutenberg University Mainz
2017-2024
California University of Pennsylvania
2024
Goethe University Frankfurt
2016
We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, ω[over ˜]_{p}^{'}, anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From ratio...
The most sensitive direct method to establish the absolute neutrino mass is observation of endpoint tritium beta-decay spectrum. Cyclotron radiation emission spectroscopy (CRES) a precision spectrographic technique that can probe much unexplored range with resolution. A lower bound set by observations oscillations, while KATRIN experiment—the current-generation experiment based on magnetic adiabatic collimation an electrostatic (MAC-E) filter—will achieve sensitivity . CRES aims avoid...
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...
We present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based positive data taken at Fermilab's Muon Campus during 2019 and 2020 accelerator runs. uses $3.1$ GeV$/c$ polarized muons stored in $7.1$-m-radius storage ring with $1.45$ T uniform field. value $ a_{\mu}$ determined from measured difference between spin precession frequency its cyclotron frequency. This normalized to strength field, using Nuclear Magnetic Resonance (NMR). ratio...
We present a new measurement of the positive muon magnetic anomaly, $a_\mu \equiv (g_\mu - 2)/2$, from Fermilab Muon $g\!-\!2$ Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, $\tilde{\omega}'^{}_p$, anomalous precession frequency corrected for beam dynamics effects,...
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...
The recently developed technique of Cyclotron Radiation Emission Spectroscopy (CRES) uses frequency information from the cyclotron motion an electron in a magnetic bottle to infer its kinetic energy. Here we derive expected radio-frequency signal waveguide CRES apparatus first principles. We demonstrate that frequency-domain is rich about electron's kinematic parameters and extract set measurables suitably designed system are sufficient for disentangling energy rest features. This lays...
Bayesian modeling techniques enable sensitivity analyses that incorporate detailed expectations regarding future experiments. A model-based approach also allows one to evaluate inferences and predicted outcomes, by calibrating (or measuring) the consequences incurred when certain results are reported. We present procedures for predictions of an experiment's both continuous discrete parameters. Using these a new model $\ensuremath{\beta}$-decay spectrum, we assess high-precision neutrino mass...
Abstract The cyclotron radiation emission spectroscopy (CRES) technique pioneered by Project 8 measures electromagnetic from individual electrons gyrating in a background magnetic field to construct highly precise energy spectrum for beta decay studies and other applications. detector, trap geometry electron dynamics give rise multitude of complex signal structures which carry information about distinguishing physical traits. With machine learning models, we develop scheme based on these...
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) -...
The beta decay of tritium in the form molecular TT is basis sensitive experiments to measure neutrino mass. final-state electronic, vibrational, and rotational excitations modify spectrum significantly, are obtained from theory. We report measurements branching ratios specific ionization states for isotopolog HT. Two earlier, concordant gave HT bound HHe$^+$ ion 89.5% 93.2%, sharp disagreement with theoretical prediction 55-57%, raising concerns about theory's reliability mass experiments....
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,...
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...
Abstract The Locust simulation package is a new C++ software tool developed to simulate the measurement of time-varying electromagnetic fields using RF detection techniques. Modularity and flexibility allow for arbitrary input signals, while concurrently supporting tight integration with physics-based simulations as input. External signals driven by Kassiopeia particle tracking are discussed, demonstrating conditional feedback between during execution. An application Project 8 experiment...
The neutron source FRANZ (Frankfurter Neutronenquelle am Stern-Gerlach-Zentrum), which is currently under construction, will be the with highest intensity in nuclear-astrophysically relevant energy region. TraceWin code was used to design High-Energy Beam-Transport section regard experimental requirements at different target positions.