Gyuseong Cho
Korea Advanced Institute of Science and Technology · 物理学・天文学
研究室紹介
Professor Gyuseong Cho's research lab specializes in radiation detection and measurement, with a focus on developing advanced gamma and neutron spectrometers for environmental, personal, and industrial monitoring. The lab emphasizes innovative detector systems using scintillators—such as NaI(Tl) and plastic scintillators—combined with modern readout technologies like silicon photomultipliers (SiPMs) to enhance performance in compact, low-power, and cost-effective designs. Key research directions include pulse pileup correction, ambient dose equivalent estimation, pseudo-gamma spectroscopy using deep learning, and the design of compact, accelerator-driven neutron sources for industrial applications. The lab integrates Monte Carlo simulations, machine learning, and experimental validation to advance radiation detection systems for real-world deployment.
Research Overview
Research Output Trend
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Selected Papers
15The detector suffers from pulse pileup by overlapping of the signals when it was used in high radiation fields. The pulse pileup deteriorates the energy spectrum and causes count losses due to random coincidences, which might not resolve within the resolving time of the detection system. In this study, it is aimed to propose a new pulse pileup correction method. The proposed method is to correct the start point of the pileup pulse. The parameters are obtained from the fitted exponential curve us
In this manuscript, we present a method for the direct calculation of an ambient dose equivalent (H*(10)) for the external gamma-ray exposure with an energy range of 40 keV to 2 MeV in an electronic personal dosimeter (EPD). The designed EPD consists of a 3×3 mm2 PIN diode coupled to a 3×3×3 mm3 CsI (Tl) scintillator block. The spectrum-to-dose conversion function (G(E)) for estimating H*(10) was calculated by applying the gradient-descent method based on the Monte-Carlo simulation. The optimal
Although plastic scintillation detectors possess poor spectroscopic characteristics, they are extensively used in various fields for radiation measurement. Several methods have been proposed to facilitate their application of plastic scintillation detectors for spectroscopic measurement. However, most of these detectors can only be used for identifying radioisotopes. In this study, we present a multitask model for pseudo-gamma spectroscopy based on a plastic scintillation detector. A deep- learn
ABSTRACT We measured the equivalent noise charge of a-Si:H pin diodes (5 ∼ 45 μm i-layer) with a pulse shaping time of 2.5 μ.sec under reverse biases up to 30 V/μm and analyzed it as a four component noise source. The frequency spectra of 1/f noise in the soft-breakdown region and of the Nyquist noise from contact resistance of diodes were measured. Using the conversion equations for a CR-RC shaper, we identified the contact resistance noise and the 1/f noise as the main noise sources in the low
After the Fukushima accident in 2011, there has been increased public concern about radioactive contamination of water resources through fallout in neighboring countries. However, there is still no available initial response system that can promptly detect radionuclides. The purpose of this research is to develop the most efficient gamma spectrometer to monitor radionuclides in an aquatic environment. We chose a thallium-doped sodium iodide (NaI(Tl)) scintillator readout with a silicon photo mul