A5036000299- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Quantum Information and Cryptography
- Physics of Superconductivity and Magnetism
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Superconducting and THz Device Technology
- Quantum Mechanics and Applications
- Catalysis and Oxidation Reactions
- Random lasers and scattering media
- Complex Systems and Time Series Analysis
- Quantum, superfluid, helium dynamics
- Strong Light-Matter Interactions
- Molecular Communication and Nanonetworks
- Metamaterials and Metasurfaces Applications
- Climate variability and models
- Graphite, nuclear technology, radiation studies
- Nuclear reactor physics and engineering
- Photocathodes and Microchannel Plates
- Quantum Computing Algorithms and Architecture
- Digital Rights Management and Security
Institute for Basic Science
2019-2024
Korea Advanced Institute of Science and Technology
2017-2023
RIKEN Center for Quantum Computing
2022
RIKEN
2022
Korea Astronomy and Space Science Institute
2021
Kyung Hee University
2019
An axion dark matter search with the CAPP-8TB haloscope is reported. Our results are sensitive to axion-photon coupling g_{aγγ} down QCD band over mass range between 6.62 and 6.82 μeV at a 90% confidence level, which most result in date.
We report an axion dark matter search at Dine-Fischler-Srednicki-Zhitnitskii sensitivity with the CAPP-12TB haloscope, assuming axions contribute 100% of local density. The excluded axion-photon coupling g_{aγγ} down to about 6.2×10^{-16} GeV^{-1} over mass range between 4.51 and 4.59 μeV a 90% confidence level. achieved experimental can also exclude Kim-Shifman-Vainshtein-Zakharov that makes up just 13% haloscope will continue wide masses.
In cavity-based axion dark matter search experiments exploring high mass regions, multiple-cavity design is under consideration as a method to increase the detection volume within given magnet bore. We introduce new idea, referred multiple-cell cavity, which provides various benefits including larger volume, simpler experimental setup, and easier phase-matching mechanism. present characteristics of this concept demonstrate feasibility with an example double-cell cavity.
We report an extensive high-sensitivity search for axion dark matter above 1 GHz at the Center Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting coupling between axions photons, explored frequency (mass) range of 1.025 (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>4.24</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">μ</a:mi><a:mi>eV</a:mi></a:mrow></a:math>) to 1.185 (<d:math...
The axion, a consequence of the PQ mechanism, has been considered as most elegant solution to strong-CP problem and compelling candidate for cold dark matter. Center Axion Precision Physics Research (CAPP) Institute Basic Science (IBS) was established on 16 October 2013 with main objective launch state art axion experiments in South Korea. Relying haloscope technique, our strategy is run several parallel explore wide range masses sensitivities better than QCD models. We utilize not only...
Abstract The Center for Axion and Precision Physics Research at the Institute Basic Science in Republic of Korea is home to multiple active axion search experiments using cavity haloscopes that operate within frequency range 1–6 GHz. convert axions photons, resulting an output power about 10 $${^{-24}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>24</mml:mn> </mml:mrow> </mml:mmultiscripts> </mml:math> –10...
We report an extensive high-sensitivity search for axion dark matter above 1\,GHz at the Center Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting coupling between axions photons, explored frequency (mass) range of 1.025\,GHz (4.24\,$\mu$eV) to 1.185\,GHz (4.91\,$\mu$eV). have introduced a number innovations in this field, demonstrating practical approach optimizing all relevant parameters haloscopes, extending presently available technology. CAPP 12\,T...
Abstract Most search experiments sensitive to quantum chromodynamics (QCD) axion dark matter benefit from microwave cavities, as electromagnetic resonators, that enhance the detectable signal power and thus experimental sensitivity drastically. As possible mass spans multiple orders of magnitude, cavities must be tunable it is desirable for cavity have a frequency range wide possible. Since generally increases dimension conductor tuning rod given cylindrical system, we developed system with...
We report the first search for Sagittarius tidal stream of axion dark matter around $4.55\text{ }\text{ }\mathrm{\ensuremath{\mu}eV}$ using CAPP-12 TB haloscope data acquired in March 2022. Our result excluded Dine-Fischler-Srednicki-Zhitnitskii and Kim-Shifman-Vainshtein-Zakharov densities ${\ensuremath{\rho}}_{a}\ensuremath{\gtrsim}0.184$ $\ensuremath{\gtrsim}0.025\text{ }\mathrm{GeV}/{\mathrm{cm}}^{3}$, respectively, over a mass range from 4.51 to $4.59\text{ at 90% confidence level.
A fast data acquisition (DAQ) system for axion dark matter searches utilizing a microwave resonant cavity, also known as haloscope searches, has been developed with two-channel digitizer that can sample 16-bit amplitudes at rates up to 180 MSamples/s. First, we realized practical DAQ efficiency of greater than 99% single channel, where the process includes online Fourier transforms (FFTs). Using an IQ mixer and two parallel channels, then implemented software-based image rejection without...
We report an axion dark matter search at Dine-Fischler-Srednicki-Zhitnitskii sensitivity with the CAPP-12TB haloscope, assuming axions contribute 100\% of local density. The excluded axion--photon coupling $g_{aγγ}$ down to about $6.2\times10^{-16}$ GeV$^{-1}$ over mass range between 4.51 and 4.59 $μ$eV a 90\% confidence level. achieved experimental can also exclude Kim-Shifman-Vainshtein-Zakharov that makes up just 13\% haloscope will continue wide masses.
Axion, a hypothetical particle originally emerging from proposed solution to the strong $CP$ problem of physics, is one favored candidates addressing dark matter puzzle. As part efforts within Center for Axion and Precision Physics Research Institute Basic Science, we are searching axion using haloscope method sensitive masses around $24.5~\mathrm{eV}$ at Kim-Shifman-Vainshtein-Zakharov (KSVZ) sensitivity. A unique 8-cell cavity, used first time in search KSVZ axions, cooled down...
This paper provides a comprehensive overview of the development flux-driven Josephson Parametric Amplifiers (JPAs) as Quantum Noise Limited Amplifier for axion search experiments conducted at Center Axion and Precision Physics Research (CAPP) Institute Basic Science. It focuses on characterization, optimization JPAs, which are crucial achieving highest sensitivity in particle detection. We discuss various characterization techniques, methods improving bandwidth, attainment ultra-low noise...
This paper provides a comprehensive overview of the development flux-driven Josephson Parametric Amplifiers (JPAs) as Quantum Noise Limited Amplifier for axion search experiments conducted at Center Axion and Precision Physics Research (CAPP) Institute Basic Science. It focuses on characterization, optimization JPAs, which are crucial achieving highest sensitivity in particle detection. We discuss various characterization techniques, methods improving bandwidth, attainment ultra-low noise...
Most search experiments sensitive to quantum chromodynamics axion dark matter benefit from microwave cavities, as electromagnetic resonators, that enhance the detected signal power and thus experimental sensitivity drastically. As possible mass spans multiple orders of magnitude, cavities must be tunable it is desirable for cavity have a frequency range wide possible. Since generally increases dimension conductor tuning rod given cylindrical system, we developed system with large dimensional...
Log-Structured Merge (LSM) tree-based Key-Value Stores (KVSs) are widely adopted for their high performance in write-intensive environments, but they often face degradation due to write stalls during compaction. Prior solutions, such as regulating I/O traffic or using multiple compaction threads, can cause unexpected drops throughput increase host CPU usage, while hardware-based approaches FPGA, GPU, and DPU aimed at reducing duration introduce additional hardware costs. In this study, we...
The axion is a hypothetical particle proposed to solve the strong $CP$ problem, and also candidate for dark matter. This non-relativistic in galactic halo can be converted into photon under magnetic field detected with microwave resonant cavity. Relying on this detection method, many experiments have excluded some mass regions certain sensitivities terms of axion-photon coupling ($g_{aγγ}$) decades, but no matter has been discovered date. CAPP-8TB an haloscope experiment at IBS/CAPP designed...
<title>Abstract</title> IBS/CAPP in South Korea is home to multiple active axion search experiments using cavity haloscopes that operate within the frequency range of 1-6 GHz. The convert axions photons, resulting an output power about 10<sup>-24</sup> 10<sup>-22</sup> W. To detect such a small signal amidst noise, quantum-limited noise amplifiers and ultra-low-temperature environment (∼10 mK) are required for all critical read-out components minimize from passive lossy components....
Many experiments operating at millikelvin temperatures with signal frequencies in the microwave regime are beginning to incorporate Josephson Parametric Amplifiers (JPA) as their first amplification stage. While there implementations for a wideband frequency response minimal need tuning, designs using resonant structures small numbers of elements still achieve best noise performance. In typical measurement scheme involving JPA, one needs control resonance frequency, pump and power desired...
<title>Abstract</title> We present a novel amplifier configuration that combines six relatively narrow-band flux-drive Josephson Parametric Amplifiers (JPAs) to extend the bandwidth for axion search experiments. have addressed challenges related tuning and cross-talk resulting from JPA band overlap while maintaining low noise levels. Our measurements demonstrate added by an RF chain, with acting as primary stage amplifier, remains between 75 175 mK 1.19 1.33 GHz 1.36 1.5 GHz.
One of the most significant and practical figures merit in axion haloscope searches is scanning rate, because unknown mass. Under best experimental parameters, only way to improve figure increase experimentally designed signal noise ratio search analysis procedure. In this paper, we report an improved using data taken by CAPP-8TB haloscope. By correcting for background biased parametrizations presence signals, realized a efficiency about 100\%. Given analyses date, rate can be 21\%, with...
In cavity-based axion dark matter search experiments exploring high mass regions, arrays of multiple cavities are typically considered to increase the detection volume within a given magnet bore. We, IBS/CAPP at KAIST, introduce new idea, referred as pizza-cylinder cavity, which is superior conventional multiple-cavity detector in terms volume, simplicity experimental setup, and facilitation phase-matching mechanism. This design promising for detecting frequency with enhanced sensitivities....