A5005582296- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Particle Detector Development and Performance
- Radio Wave Propagation Studies
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Atmospheric Ozone and Climate
- Computational Physics and Python Applications
- Precipitation Measurement and Analysis
- Cryospheric studies and observations
- Radio, Podcasts, and Digital Media
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Advanced Optical Sensing Technologies
- Noncommutative and Quantum Gravity Theories
Sungkyunkwan University
2016-2025
The University of Texas at Arlington
2018-2024
Lawrence Berkeley National Laboratory
2023-2024
Southern University and Agricultural and Mechanical College
2018-2024
Clark Atlanta University
2018-2024
University of Alaska Anchorage
2018-2024
Providence College
2018-2024
Karlsruhe Institute of Technology
2011-2024
UCLouvain
2023
RWTH Aachen University
2021-2023
First measurements of the Collins and Sivers asymmetries charged hadrons produced in deep-inelastic scattering muons on a transversely polarized 6-LiD target are presented. The data were taken 2002 with COMPASS spectrometer using muon beam CERN SPS at 160 GeV/c. asymmetry turns out to be compatible zero, as does measured within present statistical errors.
The Korea Invisible Mass Search (KIMS) experiment presents new limits on the weakly interacting massive particle (WIMP)-nucleon cross section using data from an exposure of 3409 kg·d taken with low-background CsI(Tl) crystals at Yangyang Underground Laboratory. most stringent limit spin-dependent interaction for a pure proton case is obtained. DAMA signal region both spin-independent and interactions WIMP masses greater than 20 GeV/c2 excluded by single crystal scintillators.Received 3 April...
New limits are presented on the cross section for weakly interacting massive particle (WIMP) nucleon scattering in KIMS $\mathrm{CsI}(\mathrm{T}\ensuremath{\ell})$ detector array at Yangyang Underground Laboratory. The exposure used these results is $24\text{ }524.3\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{days}$. Nuclei recoiling from WIMP interactions identified by a pulse shape discrimination method. A low energy background due to alpha emitters crystal...
In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces strong flux by bremsstrahlung, Compton scattering, and axio-recombination, ``BCA processes.'' Based on new calculation of this flux, including for first time we derive limits Yukawa coupling gae axion-photon interaction strength gaγ using CAST phase-I data (vacuum phase). For ma≲10 meV/c2 find < 8.1 × 10−23 GeV−1 at 95% CL. We stress that next-generation helioscope such as proposed IAXO could...
We have searched for 14.4 keV solar axions or more general axion-like particles (ALPs), that may be emitted in the M1 nuclear transition of 57Fe, by using axion-to-photon conversion CERN Axion Solar Telescope (CAST) with evacuated magnet bores (Phase I). From absence excess monoenergetic X-rays when was pointing to Sun, we set model-independent constraints on coupling constants pseudoscalar couple two photons and a nucleon gaγ|−1.19gaN0+gaN3| < 1.36 × 10−16 GeV−1 ma 0.03 eV at 95% confidence level.
Assuming a standard Maxwellian for the WIMP velocity distribution, we obtain bounds from null search results of 59.5 days COSINE-100 data on DAMA/LIBRA-phase2 modulation effect within context non-relativistic effective theory WIMP-nucleus scattering. Here, systematically assume that one operators allowed by Galilean invariance dominates in Hamiltonian spin-1/2 dark matter (DM) particle. We find that, although DAMA/LIBRA and use same sodium-iodide target, comparison two still depends...
The IceCube Neutrino Observatory is a cubic kilometer volume neutrino detector installed in the Antarctic at geographic South Pole. Neutrinos are detected through observation of Cherenkov light from charged relativistic particles generated interactions, using an array 86~strings optical sensor modules. Currently upgrade to preparation. This Upgrade will add seven additional strings with new sensors and calibration devices. A camera system designed for this be study bulk ice properties...
As part of the US "Snowmass" community planning exercise, UHECR has come together to write a comprehensive white paper discussing recent progress and open questions field, as they relate overarching goals particle astroparticle physics. The document outlines strategies recommendations for answering these over next two decades. It also proposes an integrated timeline, which considers expected be achieved by upgraded Pierre Auger Observatory Telescope Array experiment in this decade, need set...
We measured the thermal neutron capture cross section for $^{180}\mathrm{W}$ nucleus. There is only one previous measurement with regard to this section, and it yielded a value of ${30}_{\ensuremath{-}100%}^{+300%}$ b. To determine whether $^{181}\mathrm{W}$ an appropriate low energy neutrino source, should be more precisely estimate production rate inside nuclear reactor. using natural tungsten foil obtained $22.6\ifmmode\pm\else\textpm\fi{}1.7$
This paper addresses a conceptual study on precise passive target localization approach for substation facilities inspection using unmanned aerial vehicle (UAV) under GPS-denied environments. First, cruciform receiver array that provides the range difference (RD) measurements between facility (receiver array) and UAV (transmitter) is devised. Then, to effectively deal with real-time accurate performance issue, our RD-based problem reformulated from viewpoint of linear least-squares...
The results of a search for solar axions from the Korea Invisible Mass Search (KIMS) experiment at Yangyang Underground Laboratory are presented. Low-energy electron-recoil events would be produced by conversion into electrons via axio-electric effect in CsI(Tl) crystals. Using data an exposure 34,596 $\rm kg \cdot days$, we set 90 \% confidence level upper limit on axion-electron coupling, $g_{ae}$, $1.39 \times 10^{-11}$ axion mass less than 1 keV/$\rm c^2$. This is lower indirect neutrino...
As part of a currently ongoing upgrade to the IceCube Neutrino Observatory, seven new strings will be deployed in central region detector enhance capability detect neutrinos GeV range. A main science objective Upgrade is improve calibration as means reducing systematic uncertainties related optical properties ice. novel camera and illumination system, consisting more than 1900 cameras, 700 newly developed modules Upgrade, has been developed. combination transmission reflection photographic...
An upgrade to the IceCube Neutrino Telescope is currently under construction. For this Upgrade, seven new strings will be deployed in central region of 86 string detector enhance capability detect neutrinos GeV range. One main science objectives Upgrade an improved calibration reduce systematic uncertainties related optical properties ice. We have developed a novel camera and illumination system that part 700 newly modules with Upgrade. A combination transmission reflection photographic...
We have extensively studied the mechanism of 137Cs and 134Cs contamination in CsI compounds. The nuclei various samples been using a HPGe detector at deep underground. main source powder was desolved water used chemical process cesium extraction company side. also found that produced mainly from 133Cs by neutron capture. successfully containing no more than 2 mBq/kg only ultra‐pure for whole raw ore(pollucite).
The CAST experiment at CERN (European Organization of Nuclear Research) searches for axions from the sun. axion is a pseudoscalar particle that was motivated by theory thirty years ago, with intention to solve strong CP problem. Together neutralino, one most promising dark matter candidates. has been taking data during last two years, setting an upper limit on coupling photons more restrictive than any other solar search in mass range below 10<sup>-1</sup> eV. In 2005 will enter new...
We developed a SrCl <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> crystal scintillator for 0υ Electron Capture/β+ decay search, and 4π CsI(Tl) tagging detector to reduce the background. This experimental system was installed at YangYang underground laboratory which is WIMP search by KIMS group. The ran 60 days we have finished analyzing 2 hits back coincidence signal selection.