Saebyeok Ahn
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View article: Probing Kim-Shifman-Vainshtein-Zakharov Axion Dark Matter near 5.9 GHz Using an 8-Cell Cavity Haloscope
Probing Kim-Shifman-Vainshtein-Zakharov Axion Dark Matter near 5.9 GHz Using an 8-Cell Cavity Haloscope Open
We report on a search for axion dark matter in the frequency range near 5.9 GHz, conducted using the haloscope technique. The experiment employed an 8-cell microwave resonator designed to extend the accessible frequency range by a multifol…
View article: Probing KSVZ Axion Dark Matter near 5.9 GHz Using a 8-Cell Cavity Haloscope
Probing KSVZ Axion Dark Matter near 5.9 GHz Using a 8-Cell Cavity Haloscope Open
We report on a search for axion dark matter in the frequency range near 5.9 GHz, conducted using the haloscope technique. The experiment employed an 8-cell microwave resonator designed to extend the accessible frequency range by a multi-fo…
View article: A Host-SSD Collaborative Write Accelerator for LSM-Tree-Based Key-Value Stores
A Host-SSD Collaborative Write Accelerator for LSM-Tree-Based Key-Value Stores Open
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 performance degradation due to write stalls during compaction. Prior solutions…
View article: Extensive Search for Axion Dark Matter over 1 GHz with CAPP’S Main Axion Experiment
Extensive Search for Axion Dark Matter over 1 GHz with CAPP’S Main Axion Experiment Open
We report an extensive high-sensitivity search for axion dark matter above 1 GHz at the Center for Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting the coupling between axions and photons, explored the fr…
View article: Josephson parametric amplifier based quantum noise limited amplifier development for axion search experiments in CAPP
Josephson parametric amplifier based quantum noise limited amplifier development for axion search experiments in CAPP Open
This paper provides a comprehensive overview of the development of flux-driven Josephson Parametric Amplifiers (JPAs) as Quantum Noise Limited Amplifier for axion search experiments conducted at the Center for Axion and Precision Physics R…
View article: Improving Amplification Bandwidth by Combining Josephson Parametric Amplifiers for Active Axion Search Experiments at IBS/CAPP
Improving Amplification Bandwidth by Combining Josephson Parametric Amplifiers for Active Axion Search Experiments at IBS/CAPP Open
The Center for Axion and Precision Physics Research at the Institute for Basic Science in Republic of Korea is home to multiple active axion search experiments using cavity haloscopes that operate within the frequency range of 1–6 GHz. The…
View article: Enhanced tunable cavity development for axion dark matter searches using a piezoelectric motor in combination with gears
Enhanced tunable cavity development for axion dark matter searches using a piezoelectric motor in combination with gears Open
Most search experiments sensitive to quantum chromodynamics (QCD) axion dark matter benefit from microwave cavities, as electromagnetic resonators, that enhance the detectable axion signal power and thus the experimental sensitivity drasti…
View article: Josephson Parametric Amplifier based Quantum Noise Limited Amplifier Development for Axion Search Experiments in CAPP
Josephson Parametric Amplifier based Quantum Noise Limited Amplifier Development for Axion Search Experiments in CAPP Open
This paper provides a comprehensive overview of the development of flux-driven Josephson Parametric Amplifiers (JPAs) as Quantum Noise Limited Amplifier for axion search experiments conducted at the Center for Axion and Precision Physics R…
View article: Enhanced tunable cavity development for axion dark matter searches using a piezoelectric motor in combination with gears
Enhanced tunable cavity development for axion dark matter searches using a piezoelectric motor in combination with gears Open
Most search experiments sensitive to quantum chromodynamics (QCD) axion dark matter benefit from microwave cavities, as electromagnetic resonators, that enhance the detectable axion signal power and thus the experimental sensitivity drasti…
View article: Extensive search for axion dark matter over 1\,GHz with CAPP's Main Axion eXperiment
Extensive search for axion dark matter over 1\,GHz with CAPP's Main Axion eXperiment Open
We report an extensive high-sensitivity search for axion dark matter above 1\,GHz at the Center for Axion and Precision Physics Research (CAPP). The cavity resonant search, exploiting the coupling between axions and photons, explored the f…
View article: Analytical estimation of the signal to noise ratio efficiency in axion dark matter searches using a Savitzky-Golay filter
Analytical estimation of the signal to noise ratio efficiency in axion dark matter searches using a Savitzky-Golay filter Open
A bstract The signal to noise ratio efficiency ϵ SNR in axion dark matter searches has been estimated using large-statistic simulation data reflecting the background information and the expected axion signal power obtained from a real expe…
View article: Wideband Amplification for IBS-CAPP's Axion Search Experiments
Wideband Amplification for IBS-CAPP's Axion Search Experiments Open
We present a novel amplifier configuration that combines six relatively narrow-band flux-drive Josephson Parametric Amplifiers (JPAs) to extend the bandwidth for the axion search experiments. We have addressed challenges related to the tun…
View article: Improving amplification bandwidth by combining Josephson Parametric Amplifiers for Active Axion Search Experiments at IBS/CAPP
Improving amplification bandwidth by combining Josephson Parametric Amplifiers for Active Axion Search Experiments at IBS/CAPP Open
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 haloscopes convert axions to photons, resulting in an output power of about 10-24 t…
View article: Analytical estimation of the signal to noise ratio efficiency in axion dark matter searches using a Savitzky-Golay filter
Analytical estimation of the signal to noise ratio efficiency in axion dark matter searches using a Savitzky-Golay filter Open
The signal to noise ratio efficiency $ε_{\rm SNR}$ in axion dark matter searches has been estimated using large-statistic simulation data reflecting the background information and the expected axion signal power obtained from a real experi…
View article: Systematic Approach for Tuning Flux-driven Josephson Parametric Amplifiers for Stochastic Small Signals
Systematic Approach for Tuning Flux-driven Josephson Parametric Amplifiers for Stochastic Small Signals Open
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 are implementations f…
View article: Systematic Approach for Tuning Flux-driven Josephson Parametric Amplifiers for Stochastic Small Signals
Systematic Approach for Tuning Flux-driven Josephson Parametric Amplifiers for Stochastic Small Signals Open
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 are implementations f…
View article: Search for the Sagittarius Tidal Stream of Axion Dark Matter around 4.55 $μ$eV
Search for the Sagittarius Tidal Stream of Axion Dark Matter around 4.55 $μ$eV Open
We report the first search for the Sagittarius tidal stream of axion dark matter around 4.55 $μ$eV using CAPP-12TB haloscope data acquired in March of 2022. Our result excluded the Sagittarius tidal stream of Dine-Fischler-Srednicki-Zhitni…
View article: Search for QCD axion dark matter around 24.5 μeV using an 8-cell microwave resonant cavity haloscope and a flux-driven Josephson parametric amplifier
Search for QCD axion dark matter around 24.5 μeV using an 8-cell microwave resonant cavity haloscope and a flux-driven Josephson parametric amplifier Open
Axion, a hypothetical particle originally emerging from a proposed solution to the\nstrong $CP$ problem of particle physics, is one of the favored candidates addressing\nthe dark matter puzzle. As part of the efforts within the Center for …
View article: Axion Dark Matter Search around 4.55 $μ$eV with Dine-Fischler-Srednicki-Zhitnitskii Sensitivity
Axion Dark Matter Search around 4.55 $μ$eV with Dine-Fischler-Srednicki-Zhitnitskii Sensitivity Open
We report an axion dark matter search at Dine-Fischler-Srednicki-Zhitnitskii sensitivity with the CAPP-12TB haloscope, assuming axions contribute 100\% of the local dark matter density. The search excluded the axion--photon coupling $g_{aγ…
View article: Fast DAQ system with image rejection for axion dark matter searches
Fast DAQ system with image rejection for axion dark matter searches Open
A fast data acquisition (DAQ) system for axion dark matter searches utilizing a microwave resonant cavity, also known as axion haloscope searches, has been developed with a two-channel digitizer that can sample 16-bit amplitudes at rates u…
View article: Development of an FPGA-based realtime DAQ system for axion haloscope experiments
Development of an FPGA-based realtime DAQ system for axion haloscope experiments Open
A real-time Data Acquisition (DAQ) system for the CULTASK axion haloscope experiment was constructed and tested. The CULTASK is an experiment to search for cosmic axions using resonant cavities, to detect photons from axion conversion thro…
View article: Fast and image rejection data acquisition for axion dark matter searches
Fast and image rejection data acquisition for axion dark matter searches Open
A fast data acquisition (DAQ) system for axion dark matter searches utilizing a microwave resonant cavity, also known as axion haloscope searches, has been developed with a two-channel digitizer that can sample 16-bit amplitudes at rates u…
View article: Search for the axion dark matter in the mass range of 6.62–6.82 μeV
Search for the axion dark matter in the mass range of 6.62–6.82 μeV Open
The axion is a hypothetical particle associated with the spontaneous symmetry breaking of the U(1) symmetry, proposed by Pecci and Quinn to resolve the Charge-Parity problem in quantum chromodynamics. For invisible axions, cosmological and…
View article: CAPP-8TB: Axion Dark Matter Search Experiment around 6.7 $\mu$eV
CAPP-8TB: Axion Dark Matter Search Experiment around 6.7 $\mu$eV Open
CAPP-8TB is an axion dark matter search experiment dedicated to an axion mass\nsearch near 6.7 $\\mu$eV. The experiment uses a microwave resonant cavity under\na strong magnetic field of 8 T produced by a superconducting solenoid magnet in…
View article: CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 μeV
CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 μeV Open
The axion is a hypothetical particle proposed to solve the strong $CP$ problem, and also a candidate for dark matter. This non-relativistic particle in the galactic halo can be converted into a photon under a strong magnetic field and dete…
View article: Axion Dark Matter Research with IBS/CAPP
Axion Dark Matter Research with IBS/CAPP Open
The axion, a consequence of the PQ mechanism, has been considered as the most elegant solution to the strong-CP problem and a compelling candidate for cold dark matter. The Center for Axion and Precision Physics Research (CAPP) of the Inst…
View article: CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 $\mu$eV
CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 $\mu$eV Open
The axion is a hypothetical particle proposed to solve the strong $CP$ problem, and also a candidate for dark matter. This non-relativistic particle in the galactic halo can be converted into a photon under a strong magnetic field and dete…
View article: CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 $μ$eV
CAPP-8TB: Search for Axion Dark Matter in a Mass Range of 6.62 to 7.04 $μ$eV Open
The axion is a hypothetical particle proposed to solve the strong $CP$ problem, and also a candidate for dark matter. This non-relativistic particle in the galactic halo can be converted into a photon under a strong magnetic field and dete…
View article: Axion dark matter search experiment for the mass range of 6.62 to 7.04 $\mu$eV
Axion dark matter search experiment for the mass range of 6.62 to 7.04 $\mu$eV Open
The CAPP-8TB axion dark matter search experiment for the mass range of 6.62 $\mu$eV to 7.04 $\mu$eV equivalent to 1.6 GHz to 1.7 GHz is being performed as one of the CULTASK experiments at IBS/CAPP. The experiment utilizes the cavity halos…