J. A. Jeon
A5101966256- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radiation Therapy and Dosimetry
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- Superconducting and THz Device Technology
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Nuclear physics research studies
- Astro and Planetary Science
- Atmospheric Ozone and Climate
- Advanced NMR Techniques and Applications
- Digital Marketing and Social Media
- Superconducting Materials and Applications
- Spacecraft and Cryogenic Technologies
- GNSS positioning and interference
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Technology Adoption and User Behaviour
- Nuclear reactor physics and engineering
- thermodynamics and calorimetric analyses
Institute for Basic Science
2018-2025
Amorepacific (South Korea)
2024
University of Maryland, College Park
2017-2021
Sungkyunkwan University
2017-2019
Pennsylvania State University
2017
Université Joseph Fourier
2017
Institut National de Physique Nucléaire et de Physique des Particules
2017
Centre National de la Recherche Scientifique
2017
Institut polytechnique de Grenoble
2017
Goddard Space Flight Center
2017
The balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment launched five times from Antarctica has achieved a cumulative flight duration of about 156 days above 99.5% the atmosphere. instrument is configured with complementary and redundant particle detectors designed to extend direct measurements cosmic-ray composition highest energies practical balloon flights. All elements protons iron nuclei are separated excellent charge resolution. Here we report results first two flights ~70...
We present new measurements of the energy spectra cosmic-ray (CR) nuclei from second flight balloon-borne experiment Cosmic-Ray Energetics And Mass (CREAM). The instrument included different particle detectors to provide redundant charge identification and measure CRs up several hundred TeV. measured individual C, O, Ne, Mg, Si, Fe are presented ∼1014 eV. spectral shape looks nearly same for these primary elements it can be fitted an E−2.66 ± 0.04 power law in energy. Moreover, a measurement...
Abstract AMoRE-II aims to search for neutrinoless double beta decay ( $$0\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>0</mml:mn> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> ) with an array of 423 $$\hbox {Li}_2^{100}\hbox {MoO}_4$$ <mml:msubsup> <mml:mtext>Li</mml:mtext> <mml:mn>2</mml:mn> <mml:mn>100</mml:mn> </mml:msubsup> <mml:msub> <mml:mtext>MoO</mml:mtext> <mml:mn>4</mml:mn> </mml:msub> crystals operating in the cryogenic...
AMoRE searches for the neutrinoless double beta decay using 100 kg of enriched Mo100. Scintillating molybdate crystals coupled with a metallic magnetic calorimeter operate at milli-Kelvin temperatures to measure energy electrons emitted in decay. AMoRE-I is demonstrator full-scale AMoRE, operated Yangyang Underground Laboratory over two years. The exposure was 8.02 year (or 3.89 kgMo100 year), and total background rate near Q value 0.025±0.002 counts/keV/kg/year. We observed no indication...
AMoRE is an international project to search for the neutrinoless double beta decay of $^{100}$Mo using a detection technology consisting magnetic microcalorimeters (MMCs) and molybdenum-based scintillating crystals. Data collection has begun current AMORE-I phase project, upgrade from previous pilot phase. AMoRE-I employs thirteen $^\mathrm{48depl.}$Ca$^{100}$MoO$_4$ crystals five Li$_2$$^{100}$MoO$_4$ total crystal mass 6.2 kg. Each detector module contains with two MMC channels heat light...
We present measurements of the relative abundances cosmic-ray nuclei in energy range 500–3980 GeV/nucleon from second flight Cosmic Ray Energetics And Mass balloon-borne experiment. Particle was determined using a sampling tungsten/scintillating-fiber calorimeter, while particle charge identified precisely with dual-layer silicon detector installed for this flight. The resulting element ratios C/O, N/O, Ne/O, Mg/O, Si/O, and Fe/O at top atmosphere are 0.919 ± 0.123stat 0.030syst, 0.076...
The AMoRE-II experiment will search for the 0 νββ decay of 100 Mo nuclei using molybdate crystal scintillators, operating at milli-Kelvin (mK) temperatures, with a total 80 kg Mo. background goal is 10 –4 counts/keV/kg/year in region interest around Q-value 3,034 keV. To achieve this level, rate signals arising from emissions produced by decays radioactive impurities detector and shielding materials must be strictly controlled. do this, concentrations such are measured controlled through...
Abstract The AMoRE collaboration searches for neutrinoless double beta decay of $$^{100}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mn>100</mml:mn> </mml:mmultiscripts> </mml:math> Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. early phases the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, AMoRE-II featuring a large detector array with...
Abstract The AMoRE collaboration is preparing for the second phase of experiment, AMoRE-II, which will exploit a 100 kg Mo isotopes to search neutrinoless double beta decay from isotope. Most be contained in lithium molybdate (Li 2 MoO 4 ) crystals, act as absorbers cryogenic calorimeters coupled MMC (metallic magnetic calorimeter) sensors. detector array have total mass approximately 200 with hundreds modules. Hence, considerable effort has been taken optimize crystal terms performance and...
We present the development of light detectors with magnetic microcalorimeter (MMC) readouts designed for AMoRE neutrinoless double beta decay experiment. The are composed Ge or Si wafer as an absorber scintillation and MMC detector to monitor temperature wafer. Five measurements were carried out one four wafers prepared under various conditions. Different details assembly have been tested find optimal configuration future AMoRE-II Direct comparisons in signal size performed different while...
Abstract Sodium molybdate crystals are excellent scintillating target material that can be used to investigate the neutrinoless double beta decay of 100 Mo. Because this contains Na nuclei, it could also clarify contribution in controversial claim dark matter observation by DAMA/LIBRA experiment. Recent developments have allowed growth sodium several hundred grams, which makes possible build large scale experiments. Therefore, a cryogenic calorimeter with crystal significant mass, exploit...
The AMoRE collaboration searches for neutrinoless double beta decay of $^{100}$Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. early phases the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, AMoRE-II featuring a large detector array with about 90 kg isotope, is under construction.This paper discusses baseline design characterization lithium cryogenic calorimeters to be used in modules. results...
The Cosmic Ray Energetics And Mass (CREAM) balloon‐borne experiment, designed to directly measure cosmic‐ray particle energies from ∼1011 ∼1015 eV, had two successful flights since December 2004, with a total duration of 70 days. CREAM calorimeter is comprised 20 layers 1 radiation length (X0) tungsten interleaved active each made up fifty cm wide scintillating fiber ribbons. scintillation signals are read out multi pixel Hybrid Photo Diodes (HPDs), VA32‐HDR2/TA32C ASICs and LTC1400 ADCs....
The balloon-borne cosmic-ray experiment CREAM (Cosmic Ray Energetics And Mass) has completed two flights in Antarctica, with a combined duration of 70 days. One the detectors payload is SCD (silicon charge detector) that measures high energy cosmic rays. was assembled silicon sensors. A sensor 4 × array DC-coupled PIN diode pixels total active area 21 16 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . used during first flight...
Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment to directly measure the elemental spectra of protons iron nuclei with energies up ~ 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">15</sup> eV. Energies these cosmic-ray particles are measured by an ionization calorimeter comprised 20 layers 1 radiation length thick tungsten plates and 0.5 mm diameter scintillating fibers. Each plate 500 times 3.5...