Hoyong Jeong
A5053318256- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Physics of Superconductivity and Magnetism
- High-Energy Particle Collisions Research
- Radio Astronomy Observations and Technology
- Computational Physics and Python Applications
- Nuclear Physics and Applications
- Thermal Radiation and Cooling Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Web Applications and Data Management
- Radioactive Decay and Measurement Techniques
- BIM and Construction Integration
- Software Engineering and Design Patterns
- Risk and Safety Analysis
- Marine and Coastal Research
- Education, Safety, and Science Studies
- Scientific Research and Discoveries
- Radio Frequency Integrated Circuit Design
- Astrophysics and Cosmic Phenomena
Tohoku University
2024
Korea University
2016-2023
The Center for Axion and Precision Physics Research at the Institute Basic Science is searching axion dark matter using ultralow temperature microwave resonators. We report exclusion of mass range $10.7126--10.7186\text{ }\text{ }\ensuremath{\mu}\mathrm{eV}$ with near Kim-Shifman-Vainshtein-Zakharov (KSVZ) coupling sensitivity $10.16--11.37\text{ about 9 times larger 90% confidence level. This first search result in these ranges. It also a resonator physical less than 40 mK.
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well those reached directly at high energy colliders. Discrimination between different models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss current status prospects near future a compelling suite such experiments, along with developments needed encompassing theoretical framework.
Based on the notion that local dark-matter field of axions or axionlike particles (ALPs) in our Galaxy induces oscillating couplings to spins nucleons and nuclei (via electric dipole moment latter and/or paramagnetic axion-wind effect), we establish feasibility a new method search for ALPs storage rings. previous work allows us maintain in-plane polarization stored deuteron beam few hundred seconds, perform first proof-of-principle experiment at Cooler Synchrotron (COSY) scan momenta near...
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...
We describe a proposal to search for an intrinsic electric dipole moment (EDM) of the proton with sensitivity \targetsens, based on vertical rotation polarization stored beam. The New Physics reach is order $10^~3$TeV mass scale. Observation EDM provides best probe CP-violation in Higgs sector, at level that may be inaccessible electron-EDM experiments. improvement $\theta_{QCD}$, parameter crucial axion and dark matter physics, about three orders magnitude.
In this paper, we propose an experiment, LANSCE-mQ, aiming to detect fractionally charged and millicharged particles (mCP) using 800 MeV proton beam fixed target at the Los Alamos Neutron Science Center (LANSCE) facility. This search can shed new light on numerous fundamental questions, including charge quantization, predictions of string theories grand unification theories, gauge symmetry Standard Model, dark sector models, tests cosmic reheating. We install two-layer scintillation...
GroundBIRD is a ground-based cosmic microwave background (CMB) experiment for observing the polarization pattern imprinted on large angular scales (ℓ > 6 ) from Teide Observatory in Tenerife, Spain. Our primary scientific objective precise measurement of optical depth τ (σ(τ ∼ 0.01) to reionization epoch Universe cross-check systematic effects measurements made by previous experiments. observes wide sky area Northern Hemisphere (∼ 40% full sky) while continuously rotating telescope at high...
Based on the notion that local dark-matter field of axions or axion-like particles (ALPs) in our Galaxy induces oscillating couplings to spins nucleons and nuclei (via electric dipole moment latter and/or paramagnetic axion-wind effect), we establish feasibility a new method search for ALPs storage rings. previous work allows us maintain in-plane polarization stored deuteron beam few hundred seconds, performed first proof-of-principle experiment at Cooler Synchrotron COSY scan momenta near...
지난 3년('13~'15)간 화학물질사고는 301건이 발생하였으며, 연평균 약 100건이 집계됐다. 이와 같은 화학사고는 인명과 환경에 많은 피해를 가져왔다. '13년~'15년에 발생한 운반차량 21건으로 전체 화학사고의 21%를 차지한다. 화학물질 운반차량의 사고는 지역에 관계없이 도로상에서 발생하고 있기 때문에, 관계기관의 대응 및 사후처리 등 체계적인 현장조사가 필요하다. 또한 운반업자 화물주 등의 협조가 절대적으로 필요한 상황이다. 따라서, 본 논문에서는 사고발생에 대한 현장조사 처리 절차를 조사 분석하였다. 이를 통해 화학사고에 원인을 분석하고 현장조사와 처리절차를 체계적으로 마련하는 기초자료가 될 것으로 판단된다. 301 cases of chemical accidents occurred during the recent three years('13~15) recording about 100cases on average in Korea.. Chemical has...
The Center for Axion and Precision Physics Research (CAPP) of the Institute Basic Science (IBS) is attempting to develop prototype polarimeter detector using gas electron multiplier (GEM) technology storage ring proton EDM (SR pEDM) experiment. Systematic errors in mainly come from geometric characteristics beam dynamics. Such as tilt, shift or misalignment etc. can be sources errors. This investigation systematic has been done with GEANT4 simulation package modified by ourselves. calculate...
Electric charge quantization is a long-standing question in particle physics. While fractionally charged particles (millicharged hereafter) have typically been thought to preclude the possibility of Grand Unified Theories (GUTs), well-motivated dark-sector models proposed predict existence millicharged while preserving for unification. Such can contain rich internal structure, providing candidate dark matter. A number experiments searched (𝜒s), but parameter space (𝑄) and mass (𝑚_𝜒), region...