Article
Chemistry, Physical
L. Barrientos, M. Borja-Lloret, J. V. Casana, F. Hueso-Gonzalez, A. Ros, J. Roser, C. Senra, C. Solaz, R. Viegas, G. Llosa
Summary: The IRIS group of IFIC-Valencia has developed a Compton camera prototype with improved detection performance using Lanthanum (III) bromide scintillator crystals coupled to silicon photomultipliers. The 25 μm photodetector showed better energy resolution and angular resolution, as well as stability with temperature variations, compared to the 50 μm photodetector. The system's imaging capabilities and performance were also evaluated through studies with point-like sources and simulations.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Instruments & Instrumentation
Hyounggun Lee, Jisu Park, Wonho Lee
Summary: After the Fukushima nuclear accident, researchers focused on studying the effects of leaked radiation. They developed a portable detector system based on a Compton camera, which can measure radioactivity in highly contaminated areas with a wider field-of-view and less weight. Through experiments and evaluations, they found differences in FOV coverage and angular resolution between Compton cameras using different materials.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Instruments & Instrumentation
H. Katagiri, N. Narita, R. Enomoto, H. Muraishi, D. Kano, T. Watanabe, R. Wakamatsu, M. Kagaya, M. M. Tanaka
Summary: An omnidirectional Compton camera was developed for monitoring radioactive environmental exposure to gamma rays emitted from radiopharmaceuticals, with CaF2(Eu) crystals and detector rotation technique for wide energy range monitoring. Through experiments in laboratory and nuclear medicine facilities, the camera's capability to visualize gamma rays in various energy levels was confirmed for practical clinical use.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Instruments & Instrumentation
H. Zarei, S. Razaghi, Y. Nagao, M. Itoh, M. Yamaguchi, N. Kawachi, M. R. Ay, H. Watabe
Summary: In the field of nuclear medicine, the development of portable imaging devices with high resolution and sensitivity is of great importance. This is made possible by the development of a compact Compton camera, which utilizes a collimatorless detector coupled with a compact silicon photomultiplier array and a scintillator crystal.
JOURNAL OF INSTRUMENTATION
(2023)
Article
Engineering, Electrical & Electronic
Micah S. Johnson, Adrian S. Losko
Summary: Fast-timing, event-based camera systems are a new approach for scintillator-based applications, providing spatial and temporal information of emission light, enabling better discrimination and resolution. Simulation codes can track particles and secondaries, providing detailed information. Comparison of measurement and simulation data provides insights about scintillators.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2023)
Article
Computer Science, Artificial Intelligence
Ruize Han, Yiyang Gan, Likai Wang, Nan Li, Wei Feng, Song Wang
Summary: The potential of video surveillance can be further explored by using mobile cameras. Drone-mounted cameras at a high altitude and cameras worn by people on the ground can provide different perspectives to analyze a scene. In this work, the authors propose a method to localize the field of view of the first-person-view cameras in the global top view, using sunlight direction as a bridge between the two views. The results on a synthetic dataset show the superiority of the proposed method compared with existing methods.
INTERNATIONAL JOURNAL OF COMPUTER VISION
(2023)
Article
Chemistry, Analytical
Na-Ri Kim, Kyung-Kwang Joo, Hyun-Gi Lee
Summary: This study investigates the feasibility of using perovskite nanocrystals as an alternative to traditional wavelength shifters in liquid scintillators. The results demonstrate that perovskite nanocrystals can efficiently transfer energy and have the potential to replace traditional wavelength shifters in liquid scintillators.
Article
Optics
Zhiwei Feng, Guo Xia, Long Zhang, Yanduo Li, Wenjie Shi, Lin Gao, Rongsheng Lu
Summary: The increasing range of applications of spectral detection has led to the development of spectrometers with high spectral resolution, wide spectral dynamic range, and high compactness. This paper presents the concept of a multiple field of view spectrometer (MFOVS), which allows for simultaneous acquisition of spectra from different fields of view. Experimental prototypes based on practical applications demonstrate the advantages of MFOVS in terms of wider spectral dynamic range and simultaneous acquisition of multiple spectral information.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Biomedical
M. Kawula, T. M. Binder, S. Liprandi, R. Viegas, K. Parodi, P. G. Thirolf
Summary: In this work, a CNN-based algorithm was developed to precisely determine the interaction position of gamma-quanta in large monolithic scintillators. The algorithm significantly improved the spatial resolution, which is crucial for the future clinical applicability of the Compton camera system.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Nuclear Science & Technology
Min Li, Zhi-Min Wang, Cai-Mei Liu, Pei-Zhi Lu, Guang Luo, Yuen-Keung Hor, Jin-Chang Liu, Chang-Gen Yang
Summary: This study presents the design and performance results for compact plastic scintillator strips using a wavelength shifting fiber (WLS-fiber) readout. The strips were evaluated as a candidate for a cosmic-ray muon detector. The performance of the strips was determined by detailed characterization and measurement using 3-inch photomultiplier tubes (PMTs) and silicon photomultipliers (SiPMs). The proposed design provides a good choice for cosmic-ray muon veto detectors when space is limited.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Instruments & Instrumentation
Om Prakash Dash, Tomislav Bokulic, Damir Bosnar, Petar Zugec, Mihael Makek
Summary: We have developed a novel, compact Compton gamma camera based on GAGG:Ce scintillators and silicon photomultipliers. The camera consists of scatterer and absorber layers, each composed of 8x8 arrays of 3 mm x 3 mm x 3 mm GAGG:Ce pixels. The scatterer and absorber pixels are optically coupled using plexiglass lightguides and readout by the same SiPM. The detector exhibits good energy resolution and we have successfully reconstructed the image of a 662 keV gamma source using a simple algorithm.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Computer Science, Information Systems
Huajian Deng, Hao Wang, Xiaoya Han, Yang Liu, Zhonghe Jin
Summary: In this paper, a novel camera calibration method for infrared horizon sensors is presented and validated. The method utilizes three infrared targets as control points and a rotary table to evenly distribute the control points in the field of view. Compared to traditional methods, this method is easier to implement and cost-effective, resulting in at least a 30% improvement in calibration accuracy.
FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING
(2023)
Article
Instruments & Instrumentation
Donghwan Kim, Mizuki Uenomachi, Kenji Shimazoe, Hiroyuki Takahashi
Summary: Compton imaging is a powerful method for acquiring the distribution of gamma-ray emitting radioactive sources, with applications in homeland security and medical imaging. In this study, a single scattering correction successfully removed noise from reconstructed images without compromising image quality, improving quantitative accuracy.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Computer Science, Information Systems
Geonwoo Kim, Deokwoo Lee
Summary: The study introduces an adaptive view selection method that efficiently determines the optimal number of images needed to generate a 3D mesh and image textures, reducing computational complexity while maintaining image quality.
Article
Chemistry, Analytical
Hyun Myung Kim, Young Jin Yoo, Jeong Min Lee, Young Min Song
Summary: This article discusses the realization of 3D image depth information using light-field cameras, focusing on advanced light-field camera technology that utilizes micro-lens arrays as key components. By adjusting the spacing factor, a practical strategy for wide field-of-view light-field cameras is achieved, optimizing the M value to improve the accuracy of LF images.
Article
Physics, Multidisciplinary
Minho Kim, Jae Keon Bae, Kyeong Min Kim, Wonho Lee
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Nuclear Science & Technology
Taewoong Lee, Sung-Woo Kwak, Wonho Lee
NUCLEAR ENGINEERING AND TECHNOLOGY
(2018)
Article
Instruments & Instrumentation
Ajin Jo, Wonho Lee
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2018)
Article
Nuclear Science & Technology
Changyeon Yoon, Wonho Lee
NUCLEAR TECHNOLOGY
(2018)
Article
Physics, Multidisciplinary
Taewoong Lee, Younghak Kim, Wonho Lee
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Nuclear Science & Technology
Minho Kim, Jae Keon Bae, Bong Hwan Hong, Kyeong Min Kim, Wonho Lee
NUCLEAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Instruments & Instrumentation
Taewoong Lee, Hyounggun Lee, Wonho Lee
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2020)
Article
Nuclear Science & Technology
Younghak Kim, Taewoong Lee, Wonho Lee
NUCLEAR ENGINEERING AND TECHNOLOGY
(2019)
Article
Chemistry, Inorganic & Nuclear
Taewoong Lee, Younghak Kim, Ajin Jo, Jongguk Kim, Wonho Lee
APPLIED RADIATION AND ISOTOPES
(2019)
Article
Chemistry, Inorganic & Nuclear
Taewoong Lee, Minho Kim, Wonho Lee, Byoungsoo Kim, Ilhan Lim, Kanghyon Song, Jongguk Kim
APPLIED RADIATION AND ISOTOPES
(2019)
Correction
Physics, Multidisciplinary
Taewoong Lee, Younghak Kim, Wonho Lee
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2020)
Article
Engineering, Electrical & Electronic
Ajin Jo, Wonho Lee
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2020)
Article
Engineering, Electrical & Electronic
Hyounggun Lee, Taewoong Lee, Wonho Lee
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2020)
Article
Nuclear Science & Technology
Jun Lee, Younghak Kim, Aleksey Bolotnikov, Wonho Lee
Summary: The performance of sequence tracking methods for multiple interaction events in specific CdZnTe Compton imagers was evaluated using Monte Carlo simulations. The results showed that double arrays outperformed single arrays in terms of angular resolution and signal-to-noise ratio for a 662 keV point source detection.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Ajin Jo, Wonho Lee
Summary: An X-ray fluorescence (XRF) imaging system, using deep learning models and a CdTe semiconductor detector array, is able to analyze and quantify the distribution and types of elements in different materials.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2022)
Article
Instruments & Instrumentation
Jinlu Ruan, Liang Chen, Pengxiao Xu, Yapeng Zhang, Xue Du, Hongqiao Yin, Shiyi He, Fangbao Wang, Xun Zhang, Xiaoping Ouyang
Summary: A new SiC detector with a faster time response was developed to improve the temporal response of SiC-HPMTs. The improved SiC-HPMT showed significantly enhanced temporal response compared to the previous SiC-HPMT, and it can accurately measure the time information of fast pulsed radiation fields.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Kevin Nash
Summary: This article discusses the need for extensive upgrades of the LHC detectors, particularly the Outer Tracker, due to the demanding conditions and radiation of the High Luminosity LHC scenario. The design choices, technological approaches, and R&D activities for the Outer Tracker Phase-2 upgrade are highlighted.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
S. A. Wotton
Summary: The hadron particle identification provided by LHCb's RICH system is crucial for the success of the experiment, and it will continue to play a significant role in Upgrade II. To maintain the current excellent particle identification performance, substantial improvements in the precision of measuring the space and time coordinates of detected photons in the RICH and in the resolution of the reconstructed Cherenkov angle are required.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
R. Cardarelli, A. Rocchi, G. Aielli, P. Camarri, A. Di Ciaccio, L. Di Stante, B. Liberti, E. Pastori, L. Pizzimento, G. Proto
Summary: The Resistive Cylindrical Chamber (RCC) is a new generation of gaseous particle detectors that overcome the limitations of Resistive Plate Chambers (RPC) and expand their application range. By transitioning from planar to cylindrical geometry, while maintaining an almost planar electric field, the RCC achieves improved detection efficiency, increased gas pressure, and the possibility of using eco-friendly gases.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Giacomo Volpe
Summary: The ALICE collaboration is proposing a new apparatus, ALICE 3, to investigate the Quark Gluon Plasma (QGP) properties. In this context, conceptual studies for the development of a RICH detector for ALICE 3 are ongoing. The proposed baseline layout is a proximity-focusing RICH, using aerogel as Cherenkov radiator and Silicon Photomultipliers for photon detection. The detector specifications and performance obtained by Monte Carlo simulation are presented, along with the R&D challenges related to the design.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
M. G. Mazarakis, E. Jongewaard, J. Ellsworth
Summary: This report presents experimental data and a step-by-step technique for evaluating the work functions of thermionic cathodes. The experiments were conducted using small-sized thermionic cathodes provided by Spectra-Mat corporation. The cathode electron current emission work function is emphasized as a crucial parameter for selecting cathodes in various applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
M. Loyd, A. Khaplanov, V. Sedov, J. Beal, T. Visscher, C. Donahue, C. Montcalm, G. Warren, R. Butz, C. Boone, C. Hart, R. Riedel, Y. Diawara
Summary: Thermal and cold neutron beamlines require detector systems with high efficiency, large active area, and good spatial resolution. This study presents a new design of Anger camera using silicon photomultipliers (SiPMs) instead of photomultiplier tubes (PMTs), offering better resolution, less distortion, and more compactness. The use of SiPMs also enables the camera to be used in strong magnetic fields, providing additional experimental capabilities.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Thomas Neulinger, Hanno Filter, Oliver Zimmer
Summary: This paper describes the mathematical foundation for analyzing vertical time-of-flight (TOF) measurements using ultracold neutrons (UCN). It enables the spectroscopy of UCN with kinetic energies below the neutron optical potential of the detector entrance window. The paper provides general treatment methods and transformation rules for converting vertical TOF spectra into other spectra of interest.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Huynh Dinh Chuong, Nguyen Huynh Duy Khang, Le Thi Ngoc Trang, Nguyen Thi Truc Linh, Truong Thanh Sang, Nguyen Thanh Dat, Hoang Duc Tam
Summary: This paper presents a comparative study of three models, including virtual point detector (VPD), curve fitting (CF), and machine learning (ML), in determining the full-energy peak efficiency (FEPE) of HPGe detector. The study found that the ML model outperforms VPD and CF models in terms of accuracy.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
M. H. Kushoro, M. Angelone, D. Bozzi, G. Gorini, F. La Via, E. Perelli Cippo, M. Pillon, M. Tardocchi, M. Rebai
Summary: This paper presents the characterization of a series of SiC detectors operated with partial polarization, achieving excellent energy resolution and detection characteristics for both alpha particles and neutrons. The results demonstrate the potential of SiC detectors for fast neutron detection in fusion experiments. The limitations and challenges for manufacturing thick SiCs in the future are also discussed.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Deb Sankar Bhattacharya, Andrea Bressan, Chandradoy Chatterjee, Silvia Dalla Torre, Mauro Gregori, Alexander Kiselev, Stefano Levorato, Anna Martin, Saverio Minutoli, Mikhail Osipenko, Richa Rai, Marco Ripani, Fulvio Tessarotto, Triloki Triloki
Summary: In this article, we report on the measurement of the time resolution of an LAPPD prototype using Cherenkov radiation emitted by high energy hadrons. Our approach has demonstrated the capability of measuring time resolutions as fine as 25-30 ps. The measured time resolution for single photoelectrons is about 80 ps r.m.s.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Bharti Rohila, S. R. Abhilash, Diwanshu, Chetan Sharma, Devinder Mehta, Ashok Kumar
Summary: Self-supporting and Au backed Ag-107 targets have been fabricated using a combination of cold rolling and e-beam melting technique. The method is efficient, resulting in targets without significant material loss or major contamination. Various techniques have been used for thickness measurements and characterizations, and one of the fabricated targets has been successfully used in a nuclear physics experiment.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
B. Kronheim, A. Belloni, T. K. Edberg, S. C. Eno, C. Howe, C. Palmer, C. Papageorgakis, M. Paranjpe, S. Sriram
Summary: This paper presents measurements of the relative decrease of light output during irradiation of small plastic scintillator tiles read out by silicon photomultipliers. The study found substantial temporary damage during low-temperature irradiation, regardless of oxygen concentration and wrapping material. The wrapping material had an impact on the relative light loss, with the 3M(TM) Enhanced Specular Reflector Film showing the largest loss. The light loss was less at warmer temperatures and similar to that in standard atmosphere with 3% oxygen concentration. Evidence of a plateau in the radical density was seen for the data at 0 degrees C.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
V. V. Haurylavets, V. K. Ivanov, A. V. Korol, A. V. Solov'yov
Summary: Computational modeling of high-energy electron passage through crystalline media is conducted using relativistic molecular dynamics. The results show good agreement with experimental data, demonstrating the accuracy of the simulations. Minor discrepancies between theory and experiment are discussed.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Instruments & Instrumentation
Luca Quaglia, R. Cardarelli, B. Liberti, E. Pastori, G. Proto, L. Pizzimento, A. Rocchi, G. Aielli, P. Camarri, A. Di Ciacco, L. Di Stante, R. Santonico, D. Boscherini, A. Bruni, L. Massa, A. Polini, M. Romano, L. Benussi, S. Bianco, D. Piccolo, G. Saviano, M. Abbrescia, L. Congedo, M. De Serio, G. Galati, G. Pugliese, S. Simone, D. Ramos, P. Salvini, A. Samalan, M. Tytgat, N. Zaganidis, J. Eysermans, A. Ferretti, M. Gagliardi, L. Terlizzi, E. Vercellin, P. Dupieux, B. Joly, S. P. Manen, R. Guida, B. Mandelli, G. Rigoletti, M. Barroso, M. C. Arena, A. Pastore, R. Aly, M. Verzeroli, S. Buontempo
Summary: Resistive Plate Chamber detectors are widely used in current High Energy Physics experiments. However, efforts are being made to find eco-friendly gas alternatives to Tetrafluoroethane. The RPC EcoGas@GIF++ collaboration aims to improve RPC technology, evaluate the performance of RPCs with eco-friendly gas mixtures, and conduct aging tests.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)