A5108061295- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Quantum Information and Cryptography
- Scientific Research and Discoveries
- Computational Physics and Python Applications
- Stellar, planetary, and galactic studies
- Biofield Effects and Biophysics
- Astrophysics and Cosmic Phenomena
- Mechanical and Optical Resonators
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
Pacific Northwest National Laboratory
2018-2025
University of Washington
2016
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 report the results of a QCD axion dark matter search with discovery ability for Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axions using an haloscope. Sub-Kelvin noise temperatures are reached ultralow Josephson parametric amplifier cooled by dilution refrigerator. This work excludes (with 90% confidence level) DFSZ masses between 3.27 to <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>3.34</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi...
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 describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation JTWPA for period about two weeks achieved sensitivity to axion-like particle with axion-photon couplings above 10-13 Ge V-1 over narrow range masses centered around 19.84 µeV by tuning resonant frequency cavity 4796.7-4799.5 MHz. was operated insert experiment as part independent receiver chain that attached 0.56-l cavity. ability deliver high gain...
We investigate reentrant and dielectric loaded cavities for the purpose of extending range axion cavity haloscopes to lower masses, below where Axion Dark Matter eXperiment (ADMX) has already searched. Reentrant were simulated numerically calculate optimize their form factors quality factors. A prototype was built its measured properties compared with simulations. estimate sensitivity dark matter searches using inserted in existing ADMX magnet at University Washington a large being installed...
We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above $\mathrm{10^{-13}}$ $\mathrm{GeV^{-1}}$ over the frequency range 4796.7--4799.5 MHz, corresponding to narrow axion masses centered around 19.84 $μ$eV. This measurement represents first implementation Josephson Traveling Wave Parametric Amplifier (JTWPA) in search. The JTWPA was operated insert Axion Dark Matter eXperiment (ADMX) as part an independent receiver chain that attached 0.588-liter...
We report the results from a haloscope search for axion dark matter in $3.3\text{-}4.2~{\mu}$eV mass range. This excludes axion-photon coupling predicted by one of benchmark models "invisible" matter, KSVZ model. sensitivity is achieved using large-volume cavity, superconducting magnet, an ultra low noise Josephson parametric amplifier, and sub-Kelvin temperatures. The validity our detection procedure ensured injecting detecting blind synthetic signals.
We report the first result of a direct search for cosmic axion background (CaB)-a relativistic axions that is not dark matter-performed with haloscope, Axion Dark Matter eXperiment (ADMX). Conventional haloscope analyses signal narrow bandwidth, as predicted matter, whereas CaB will be broad. introduce novel analysis strategy, which searches induced daily modulation in power measured by haloscope. Using this, we repurpose data collected to matter set limit on photon coupling originating from...
The QCD (Quantum ChromoDynamics) axion emerged as one of the best-motivated dark matter candidates. In 2018, Axion Dark Matter eXperiment (ADMX), U.S. Department Energy’s “Gen 2” flagship dark-matter projects, demonstrated first sensitivity to highly plausible “DFSZ” couplings over a small frequency range. We anticipate this development marks step in constructing yet more powerful experiments that can explore large swaths parameter space at high and result discovery. But, realizing requires...
The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that dark matter is described by isothermal halo model. However, precise nature of velocity distribution still unknown, and alternative models have been proposed. We report results a non-virialized axion search over mass range 2.81-3.31 {\mu}eV, corresponding to frequency 680-800 MHz. This analysis marks most sensitive for Doppler effects in...
We report the results of a QCD axion dark matter search with discovery ability for Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axions using an haloscope. Sub-Kelvin noise temperatures are reached ultra low-noise Josephson parametric amplifier cooled by dilution refrigerator. This work excludes (with 90% confidence level) DFSZ masses between 3.27 to 3.34 {\mu}eV, assuming standard halo model local energy density 0.45 GeV/cc made up 100% axions.
We report the first result of a direct search for cosmic axion background ($\mathrm{C}a\mathrm{B}$)---a relativistic axions that is not dark matter---performed with haloscope, Axion Dark Matter eXperiment (ADMX). Conventional haloscope analyses signal narrow bandwidth, as predicted matter, whereas $\mathrm{C}a\mathrm{B}$ will be broad. introduce novel analysis strategy, which searches induced daily modulation in power measured by haloscope. Using this, we repurpose data collected to matter...