Karie Badgley
A5074352885- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Magnetic Properties and Applications
- Magnetic Properties of Alloys
- Nuclear Materials and Properties
- Magnetic properties of thin films
- Radiation Effects and Dosimetry
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Gyrotron and Vacuum Electronics Research
- High-Energy Particle Collisions Research
- Subcritical and Supercritical Water Processes
- Laser Design and Applications
- Heat transfer and supercritical fluids
- Physics of Superconductivity and Magnetism
- Astrophysics and Cosmic Phenomena
- Microstructure and Mechanical Properties of Steels
- Dark Matter and Cosmic Phenomena
- Chemical Reactions and Isotopes
Fermi National Accelerator Laboratory
2017-2024
Fermi Research Alliance
2024
Texas A&M University
2010-2016
Mitchell Institute
2013
We present the first results of Fermilab Muon g-2 Experiment for positive muon magnetic anomaly $a_\mu \equiv (g_\mu-2)/2$. The is determined from precision measurements two angular frequencies. Intensity variation high-energy positrons decays directly encodes difference frequency $\omega_a$ between spin-precession and cyclotron frequencies polarized muons in a storage ring. ring field measured using nuclear resonance probes calibrated terms equivalent proton spin precession...
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 Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $ω_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run 2018. When combined a precision measurement magnetic field experiment's ring, determines anomaly $a_μ({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes...
The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of muon to a combined precision 0.46 parts per million with data collected during its first physics run in 2018. This paper documents measurement magnetic field storage ring. is monitored by nuclear resonance systems and calibrated terms equivalent proton spin spherical water sample at 34.7$^\circ$C. weighted distribution resulting $\tilde{\omega}'^{}_p$, denominator ratio...
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,...
The Fermilab Mu2e experiment has been developed to search for evidence of charged lepton flavor violation through the direct conversion muons into electrons. transport solenoid is an s-shaped magnet that guides from source stopping target. It consists 52 superconducting coils arranged in 27 coil modules. A full-size prototype module, with all features a typical module full assembly, was successfully manufactured by collaboration between INFN-Genoa and Fermilab. contains two can be powered...
This paper presents the beam dynamics systematic corrections and their uncertainties for Run-1 data set of Fermilab Muon g-2 Experiment. Two to measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing use electrostatic quadrupole (ESQ) vertical focusing in storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through radial electric components created ESQ system. The correction depends on...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Peter McIntyre, Saeed Assadi, Karie Badgley, William Baker, Justin Comeaux, James Gerity, Joshua Kellams, Al McInturff, Nathaniel Pogue, Supathorn Phongikaroon, Akhdiyor Sattarov, Michael Simpson, Elizabeth Sooby, Pavel Tsvetkov; Accelerator-driven subcritical fission in molten salt core: Closing the nuclear...
An observation of Charged Lepton Flavor Violation (CLFV) would be unambiguous evidence for physics beyond the Standard Model. The Mu2e and COMET experiments, under construction, are designed to push sensitivity CLFV in mu e conversion process unprecedented levels. Whether is observed or not, there a strong case made further improving sensitivity, examining on additional target materials. Mu2e-II proposed upgrade Mu2e, with at least an order magnitude rate over Mu2e. approach challenges this...
Achieving the low emittances required for a muon collider requires ionization cooling.Much of that cooling occurs in compact cells where superconducting coils and conventional RF cavities are closely interleaved.The real challenges these reside their engineering challenges: high field solenoids, cavities, absorbers, often designed near technological limits, placed close proximity to each other.We thus propose build prototype cell demonstrate capability constructing an channel reaching lowest...
The Snowmass report on rare processes and precision measurements recommended Mu2e-II a next generation muon facility at Fermilab (Advanced Muon Facility) as priorities for the frontier. Workshop future program FNAL was held in March 2023 to discuss design studies Mu2e-II, organizing efforts facility, identify synergies with other (e.g., collider). Topics included high-power targetry, status of R&D development compressor rings, FFA concepts experiments (conversion, decays, muonium...
The muon-to-electron conversion experiment (Mu2e) at Fermilab is designed to explore charged lepton flavor violation. It composed of three large superconducting solenoids: the production solenoid, transport solenoid (TS), and detector solenoid. TS formed by two magnets: upstream downstream. Each has its own cryostat power supply. Tolerance sensitivity studies position angular alignment each coil in this magnet system were performed past with objective demonstrate that design meets all field...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation N. Pogue, S. Assadi, K. Badgley, J. Comeaux, Kellams, A. McInturff, P. McIntyre, Sattarov; A strong-focusing 800 MeV cyclotron for high-current applications. AIP Conference Proceedings 19 April 2013; 1525 (1): 226–229. https://doi.org/10.1063/1.4802324 Download citation file: Ris (Zotero) Reference Manager...
Presented is a study of uncompensated magnetization in antiferromagnets performed by SQUID and VSM magnetometry, polarized neutron reflectometry. This observed studied as function temperature cooling conditions. Uncompensated found close to the top surface antiferromagnet (interface with ferromagnet) also "bulk" antiferromagnetic film. It has been established that this plays crucial role exchange bias. To understand origin magnetization, ab initio calculations are performed.
Abstract The muon-to-electron conversion (Mu2e) experiment at Fermilab will be used to search for the charged lepton flavor-violating of muons electrons in field an atomic nucleus. Mu2e is currently design and construction stage expected begin operations 2022. uses four large superconducting solenoid magnets including a Production Solenoid (PS), Upstream Downstream Transport (TSu TSd) Detector (DS). This paper focus on cryogenic distribution system these magnets. Liquid helium supplied from...
The Proton Improvement Plan II (PIP-II) is an enhancement to the Fermilab accelerator complex enabling a high intensity proton beam support laboratory’s experiments. heart of PIP-II superconducting linac which will increase injection energy in booster from existing 400 MeV 800 MeV. To make room for modified into booster, two shorter defocusing gradient magnets have been designed. Two wide aperture also designed go on either side extraction septa reduce extractions losses.
We report the development of a conceptual design for accelerator-driven subcritical fission in molten salt core (ADSMS). ADSMS is capable destroying all transuranics at same rate and proportion as they are produced conventional nuclear power plant. The fueled solely by extracted from used fuel reduces its radiotoxicity factor 10,000. offers way to close cycle so that full energy potential fertile fuels uranium thorium can be recovered.