D. Bowring
A5078880054- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Muon and positron interactions and applications
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Electrostatic Discharge in Electronics
- Superconducting and THz Device Technology
- Quantum Information and Cryptography
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Quantum Computing Algorithms and Architecture
- Advanced Thermodynamics and Statistical Mechanics
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Cosmology and Gravitation Theories
- Quantum Mechanics and Applications
- Computational Physics and Python Applications
Fermi National Accelerator Laboratory
2016-2025
Illinois Institute of Technology
2017
University of Chicago
2017
Rutherford Appleton Laboratory
2017
Lawrence Berkeley National Laboratory
2012-2016
Colorado State University
2016
Fermi Research Alliance
2016
University of Virginia
2004-2011
Thomas Jefferson National Accelerator Facility
2009
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2004-2007
This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 μeV. The excludes range of axion-photon couplings predicted by plausible models invisible axion. unprecedented sensitivity is achieved operating large-volume at subkelvin temperatures, thereby reducing thermal noise as well excess ultralow-noise superconducting quantum interference device amplifier used signal power readout. Ongoing searches will provide nearly definitive tests...
This Letter reports on a cavity haloscope search for dark matter axions in the Galactic halo mass range 2.81-3.31 μeV. utilizes combination of low-noise Josephson parametric amplifier and large-cavity to achieve unprecedented sensitivity across this range. excludes full axion-photon coupling values predicted benchmark models invisible axion that solve strong CP problem quantum chromodynamics.
We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program. This haloscope plans to search bosonic dark matter across [10^{-3},1] eV ([0.24, 240] THz) mass range. BREAD proposes a cylindrical metal barrel convert into photons, which novel parabolic reflector focuses onto photosensor. unique geometry enables enclosure in standard cryostats high-field solenoids, overcoming limitations of current dish antennas. A pilot 0.7 m^{2} experiment...
In recent years, the lack of a conclusive detection WIMP dark matter at 10 GeV/c$^{2}$ mass scale and above has encouraged development low-threshold detector technology aimed probing lighter candidates. Detectors based on Cooper-pair-breaking sensors have emerged as promising avenue for this due to low (meV-scale) energy required breaking Cooper pair in most superconductors. Among them, devices superconducting qubits are interesting candidates sensing their observed sensitivity broken pairs....
The μeV axion is a well-motivated extension to the standard model. Axion Dark Matter eXperiment (ADMX) collaboration seeks discover this particle by looking for resonant conversion of dark-matter axions microwave photons in strong magnetic field. In Letter, we report results from pathfinder experiment, ADMX "Sidecar," which designed pave way future, higher mass, searches. This testbed experiment lives inside and operates tandem with main experiment. Sidecar excludes masses three widely...
Searching for axion dark matter, the ADMX Collaboration acquired data from January to October 2018, over mass range 2.81–3.31 μeV, corresponding frequency 680–790 MHz. Using an haloscope consisting of a microwave cavity in strong magnetic field, experiment excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions at 90% confidence level and 100% matter density this entire range, except few gaps due mode crossings. This paper explains full analysis run 1B, motivating choices informed by...
We present first results from a dark photon matter search in the mass range 44 to 52 μeV (10.7-12.5 GHz) using room-temperature dish antenna setup called GigaBREAD. Dark converts ordinary photons on cylindrical metallic emission surface with area 0.5 m^{2} and is focused by novel parabolic reflector onto horn antenna. Signals are read out low-noise receiver system. A data taking run 24 days of does not show evidence for this range, excluding mixing parameters χ≳10^{-12} at 90% confidence...
We present an end-to-end workflow for superconducting qubit readout that embeds co-designed Neural Networks (NNs) into the Quantum Instrumentation Control Kit (QICK). Capitalizing on custom firmware and software of QICK platform, which is built Xilinx RFSoC FPGAs, we aim to leverage machine learning (ML) address critical challenges in accuracy scalability. The utilizes hls4ml package employs quantization-aware training translate ML models hardware-efficient FPGA implementations via...
We have measured the fully inclusive K+ -> mu+nu(gamma) absolute branching ratio with KLOE experiment at DAFNE, Frascati Phi-factory. From some 865,283 decays obtained from a sample of about 5.2x10^8 Phi-meson decays, we find BR(K+ mu+ nu (gamma)) = 0.6366 +-0.0009(stat.) +-0.0015(syst.), corresponding to an overall fractional error 0.27%. Using recent lattice results on decay constants pseudoscalar mesons one can obtain estimate for CKM mixing matrix element |Vus|=0.2223+-0.0026.
Microcalorimeters that leverage microwave kinetic inductance detectors to read out phonon signals in the particle-absorbing target, referred as phonon-mediated (KIPM) detectors, offer an attractive detector architecture probe dark matter (DM) down fermionic thermal relic mass limit. A prototype KIPM featuring a single aluminum resonator patterned onto 1-gram silicon substrate was operated NEXUS low-background facility at Fermilab for characterization and evaluation of this architecture's...
We present a measurement of the KL lifetime using KLOE detector. From sample 4 x 10^8 KS pairs following reaction e+ e- -> phi we select 15 10^6 p0 decays tagged by pi+ pi- events. fit proper time distribution find tau_L = (50.92 +- 0.17{stat} 0.25{syst})$ ns. This is most precise performed to date.
A novel single-particle technique to measure emittance has been developed and used characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The beams, whose mean momenta vary from 171 281 MeV/c, have emittances of approximately 1.5--2.3 \pi mm-rad horizontally 0.6--1.0 vertically, a horizontal dispersion 90--190 mm momentum spreads about 25 MeV/c. There is reasonable agreement between measured parameters results simulations. are found meet requirements MICE.
We present a measurement of the branching ratio CP violating decay KL->pi+pi- performed by KLOE experiment at phi factory DAFNE. use 328 pb-1 data collected in 2001 and 2002, corresponding to ~ 150 million tagged KL mesons. find BR(KL->pi+pi-) = $(1.963 +/- 0.012 0.017)x 10^-3. This is fully inclusive final-state radiation. Using above result, we determine modulus amplitude |\eta_{+-}| be (2.219 0.013)x 10^{-3} |\epsilon| (2.216 10^{-3}.
Machine learning (ML) is a subfield of artificial intelligence. The term applies broadly to collection computational algorithms and techniques that train systems from raw data rather than priori models. ML are now technologically mature enough be applied particle accelerators, we expect will become an increasingly valuable tool meet new demands for beam energy, brightness, stability. intent this white paper provide high-level introduction problems in accelerator science operation where...