Article
Materials Science, Multidisciplinary
J. M. Wilde, S. X. M. Riberolles, Atreyee Das, Y. Liu, T. W. Heitmann, X. Wang, W. E. Straszheim, S. L. Bud'ko, P. C. Canfield, A. Kreyssig, R. J. McQueeney, D. H. Ryan, B. G. Ueland
Summary: In this study, the three antiferromagnetic phases of EuMnSb2 and their magnetic structures were revealed through experimental data and analysis. It was found that the magnetic coupling between manganese and europium can tune the topological properties of the material, which is of significance for applications involving the topological features of this material.
Article
Multidisciplinary Sciences
Boyuan Shen, Xiao Chen, Huiqiu Wang, Hao Xiong, Eric G. T. Bosch, Ivan Lazic, Dali Cai, Weizhong Qian, Shifeng Jin, Xin Liu, Yu Han, Fei Wei
Summary: Single-molecule imaging is a challenging yet beneficial technique for investigating intermolecular interactions at the molecular level, particularly van der Waals interactions at the sub-nanometre scale under confinement conditions. The use of a rotating para-xylene molecule as a pointer allows for real-space imaging and identification of changes in van der Waals interactions related to channel geometry. This study not only provides insight into host-guest interactions in porous materials, but also encourages further exploration of other single-molecule behaviors using electron microscopy techniques.
Article
Crystallography
Nebil A. Katcho, Laura Canadillas-Delgado, Oscar Fabelo, Maria Teresa Fernandez-Diaz, Juan Rodriguez-Carvajal
Summary: This software package provides a graphical user interface for the data reduction of single crystal neutron diffraction, allowing users to visualize and interact with the data easily. It consists of a series of programs for performing peak detection, indexing, refinement, and integration tasks, with graphical tools for visualization and interaction in two and three dimensions. The software is particularly useful for handling complex problems involving incommensurate structures, twins, or diffuse scattering.
Article
Materials Science, Multidisciplinary
Yuki Yanagi, Hiroaki Kusunose, Takuya Nomoto, Ryotaro Arita, Michi-To Suzuki
Summary: We propose a systematic method for generating symmetry-adapted magnetic structures to analyze complex modulated magnetic structures. The method extends the generation scheme based on multipole expansion, which was previously only applicable for k = 0. By mapping the multipole magnetic alignments to the periodic crystal structure with the phase factor for wave vector k, symmetry-adapted magnetic structures with ordering vector k can be obtained. This method provides all magnetic bases compatible with irreducible representations under a k group for a given crystal structure and wave vector k.
Article
Instruments & Instrumentation
Gerard Rovira, Atsushi Kimura, Shoji Nakamura, Shunsuke Endo, Osamu Iwamoto, Nobuyuki Iwamoto, Tatsuya Katabuchi, Kazushi Terada, Yu Kodama, Hideto Nakano, Jun-ichi Hori, Yuji Shibahara
Summary: The research introduced a neutron filtering system to produce quasi-monoenergetic neutron beams, and analyzed the filtered neutron spectrum using capture and transmission measurements as well as Monte Carlo simulations. The characteristics of the filtered neutron beam and its potential for neutron cross-section measurements in the fast neutron region were discussed.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Chemistry, Physical
Rafael B. Nuernberg, Juan F. Basbus, Kevin C. Lux, Miguel P. Sainz, Gabriel J. Cuello, Ana C. M. Rodrigues, Andrea A. Piarristeguy, Michel Ribes, Annie Pradel
Summary: NASICON-structured glass-ceramics based on the Li1+xCrxGeTi1-x (PO4)(3) system were synthesized, and their crystal structure and electrical properties were studied. Aliovalent substitution was found to affect the crystal structure and electrical conductivity of the materials, particularly for lithium ion conduction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Nuclear Science & Technology
Atsushi Kimura, Shoji Nakamura, Shunsuke Endo, Gerard Rovira, Osamu Iwamoto, Nobuyuki Iwamoto, Hideo Harada, Tatsuya Katabuchi, Kazushi Terada, Jun-ichi Hori, Yuji Shibahara, Toshiyuki Fujii
Summary: The neutron total and capture cross-sections of Gd-155 and Gd-157 were measured using Li-glass detectors and a NaI(TI) spectrometer at J-PARC. The total cross-sections were determined in the energy range of 5 to 100 meV, with thermal neutron energy values of 59.4 +/- 1.7 and 251.9 +/- 4.6 kilobarn for Gd-155 and Gd-157, respectively. The capture cross-sections were measured in the energy range of 3.5 to 100 meV, and the thermal energy values were found to be 59.0 +/- 2.5 and 247.4 +/- 3.9 kilobarn for Gd-155 and Gd-157, respectively. The results were compared with existing data and were found to be consistent with some previous studies but inconsistent with others.
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yifei Zhang, Joakim Brorsson, Takashi Kamiyama, Takashi Saito, Paul Erhart, Anders E. C. Palmqvist
Summary: This study investigates the chemical ordering in quaternary clathrates Ba8AlxGa16-xGe30, revealing differences in site occupancy factors of trivalent elements and atomic displacement patterns of Ba atoms based on synthesis methods. The research demonstrates key relationships between chemical ordering and structural properties, providing new insights for designing and optimizing thermoelectric materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jian-Hong Liao, Rhone P. Brocha P. Silalahi, Tzu-Hao Chiu, C. W. Liu
Summary: This study characterizes two structures using high-quality single-crystal X-ray crystallography and accurately determines the position of interstitial hydrides. Anisotropic refinement of the hydrides was successfully achieved. The distances between the central atom and copper atoms, as well as within the surrounding metal cages, were analyzed and compared with similar compounds. This work offers a thoughtful and accurate assessment of the considerations and challenges associated with anisotropic refinement for H atoms in X-ray data collection.
Article
Astronomy & Astrophysics
E. Friedman, A. Gal
Summary: The recent J-PARC E07 emulsion experiment published two new Xi(-) -N-14 capture events, IRRAWADDY and IBUKI, identified by observing weak-decay sequences of single Lambda hypernuclei. They are interpreted as Xi(-)(1s) and Xi(-)(1p) nuclear bound states with binding energies of B-Xi-(1s) =6.27 +/- 0.27 MeV and B-Xi-(1p) =1.27 +/- 0.21 MeV, respectively. However, there are doubts about the assignment of IRRAWADDY as a Xi(-)(1s) nuclear bound state and the use of IBUKI's B-Xi-(1p) value to determine the Xi-nuclear potential depth. Capturing Xi(-) events in C-12 and O-16 might provide less ambiguous results compared to N-14.
Article
Nuclear Science & Technology
Shoichiro Kawase, Atsushi Kimura, Hideo Harada, Nobuyuki Iwamoto, Osamu Iwamoto, Shoji Nakamura, Mariko Segawa, Yosuke Toh
Summary: In this study, the neutron capture cross sections of Cm-244 and Cm-246 were measured using the Accurate Neutron-Nucleus Reaction measurement Instrument at Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex. The intense neutron pulses from the Japan Spallation Neutron Source allowed for accurate measurement and identification of prompt gamma-ray peaks from neutron capture reactions.
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
(2021)
Article
Instruments & Instrumentation
Natsuki Tomida, Futaba Hayashi, Wen-Chen Chang, Ming-Lee Chu, Megan Friend, Chia-Yu Hsieh, Hiroyuki Noumi, Atsushi Sakaguchi, Hiroyuki Sako, Kotaro Shirotori, Taiga Toda, Megumu Tokuda, Roger Wendell
Summary: We have developed a new prototype multi-gap Resistive Plate Chamber (RPC) at the J-PARC 20 beam line and evaluated its performance. The results of the test show that the RPC has high time resolution.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Multidisciplinary Sciences
Yan Zeng, Bin Ouyang, Jue Liu, Young-Woon Byeon, Zijian Cai, Lincoln J. Miara, Yan Wang, Gerbrand Ceder
Summary: Experiments demonstrate that using high-entropy metal cation mixes can improve the ionic conductivity of a compound, reduce reliance on specific chemistries, and enhance synthesizability. Local distortions introduced into high-entropy materials create an overlapping distribution of site energies for alkali ions, allowing them to percolate with low activation energy. This study provides important insights into selecting optimal distortion and designing high-entropy superionic conductors across a wide compositional space.
Article
Instruments & Instrumentation
Masahide Harada, Makoto Teshigawara, Motoki Ooi, Kenichi Oikawa, Hiroshi Takada, Yujiro Ikeda
Summary: This study investigates the high-energy neutron components of the neutron beam at J-PARC pulsed neutron source using the foil activation method with threshold reactions. The comparison between experiments and calculations showed that the high-energy neutron calculations were adequate for the analysis of experimental data for NOBORU users.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Chemistry, Physical
Riki Kataoka, Masashi Nozaki, Toru Kimura, Kouji Sakaki, Toshikatsu Kojima, Kazutaka Ikeda, Toshiya Otomo, Nobuhiko Takeichi, Atsunori Kamegawa
Summary: Zirconium was successfully substituted for yttrium in YH3, forming a stable ZSY structure with a wide compositional range and low volume change rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Shinya Hosokawa, Yukinobu Kawakita, Laszlo Pusztai, Kazutaka Ikeda, Toshiya Otomo
Summary: In GexSe1-x glasses, the addition of high quality neutron diffraction data improved the reliability of the atomic structures, revealing a close relationship between partial structures near the compositional stiffness transition point (around x = 0.20-0.26).
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Physical
Keiga Fukui, Soshi Iimura, Junjie Wang, Tomofumi Tada, Takashi Honda, Kazutaka Ikeda, Toshiya Otomo, Hideo Hosono
Summary: This study investigates the pressure-chemical composition phase diagram of the LaHO-LaH3 system, focusing on the high-conductivity LaH1+2xO1-x phase with anion-excess fluorite structure. By maintaining the fluorite lattice and introducing excess H- ions at regular anion positions with distribution at interstitial sites, the stability of the anion-excess fluorite structure can be achieved, avoiding defect clustering and enabling fast anion conduction.
CHEMISTRY OF MATERIALS
(2021)
Article
Physics, Condensed Matter
K. Itoh, R. Yamada, J. Saida, K. Ikeda, T. Otomo
Summary: By investigating the structure of Cu67Zr33 amorphous alloy, it was found that there are tetrahedral and octahedral holes as well as other larger holes in the alloy, and the distribution of free volumes for these holes can be described by an exponential function. Furthermore, local structural fluctuations due to densely and loosely packed tetrahedral holes lead to negative free volume spaces.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Tomofumi Kato, Yasuhiro Yamada, Yasushi Nishikawa, Toshiya Otomo, Hayato Sato, Satoshi Sato
Summary: X-ray photoelectron spectroscopy is a powerful technique for analyzing nitrogen-doped carbon materials, but the assignment of specific nitrogen types in the materials has been questioned. This study clarified the presence of nitrogen in heptagonal and pentagonal rings, leading to ambiguous assignments of nitrogen peaks in previous works. The peak at 400.1 eV was determined to be tertiary amine nitrogen from the analysis of graphitized polyimide, challenging previous assumptions about the nitrogen content in these materials.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Hikari Watanabe, Nana Arai, Erika Nozaki, Jihae Han, Kenta Fujii, Kazutaka Ikeda, Toshiya Otomo, Kazuhide Ueno, Kaoru Dokko, Masayoshi Watanabe, Yasuo Kameda, Yasuhiro Umebayashi
Summary: The study found that the local structure of Li+ changes with increasing LiTFSA concentration, forming oligomers when the molar fraction of LiTFSA exceeds 0.25. In superconcentrated LiTFSA aqueous solution, the average structure is determined by the coordination of two water molecules and two oxygen atoms of the TFSA anion(s) to Li+.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Physical
Kazuhiro Mori, Atsushi Mineshige, Takuro Emoto, Maiko Sugiura, Takashi Saito, Kaoru Namba, Toshiya Otomo, Takeshi Abe, Toshiharu Fukunaga
Summary: The study found that by substituting Ba with Sn atoms, the electrical conductivity of BaF2-SnF2 solid electrolytes can be significantly increased, showing potential application value. Structural analysis revealed that the optimal (BaF2)0.47(SnF2)0.53 has a specific layered structure and significant differences in F atom displacement.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Katsuaki Kodama, Takashi Honda, Hiroki Yamauchi, Shin-ichi Shamoto, Kazutaka Ikeda, Toshiya Otomo
Summary: The magnetic pair distribution function (mPDF) of the intermetallic antiferromagnet Mn3RhSi was estimated from powder neutron diffraction data. It was found that short range ordering and antiferromagnetic long range ordering coexist, with the short range ordering not reproducible by a magnetic structure model consistent with crystal structure symmetry. A possible magnetic structure that can reproduce the short range ordering mPDF was proposed.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2021)
Article
Materials Science, Multidisciplinary
Tessui Nakagawa, Daichi Heshiki, Hiroki Higa, Junko Kawakami, Riki Kobayashi, Nobuko Hanada, Kazutaka Ikeda, Toshiya Otomo, Hironori Ofuchi, Masayoshi Ishida
Summary: This study used multiple analytical methods to reveal the relationship between CO2 tolerance of AB(2)-type hydrogen storage alloys and dopant M, with a focus on the importance of B site elements.
MATERIALS TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Kazutaka Ikeda, Fumika Fujisaki, Toshiya Otomo, Hidetoshi Ohshita, Takashi Honda, Toru Kawamata, Hiroshi Arima, Kazumasa Sugiyama, Hitoshi Abe, Hyunjeong Kim, Kouji Sakaki, Yumiko Nakamura, Akihiko Machida, Toyoto Sato, Shigeyuki Takagi, Shin-ichi Orimo
Summary: The study revealed the mechanism of catalyzing Al-Ti alloy in NaAlH4 with TiCl3, indicating that Al was partially substituted by Ti during the first desorption process, leading to the formation of highly dispersed nanosized Al-Ti alloy.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Kouji Sakaki, Hyunjeong Kim, Eric H. Majzoub, Akihiko Machida, Tetsu Watanuki, Kazutaka Ikeda, Toshiya Otomo, Masataka Mizuno, Daiju Matsumura, Yumiko Nakamura
Summary: The local structure in the di-hydride phases of V-Ti-Cr solid solution alloys was investigated using synchrotron X-ray and neutron total scattering experiments. The crystal structure was found to be face centered cubic (FCC), and there was no difference between the local structure and average structure. The combination of neutron PDF and first-principles calculations with the special quasi-random structure (SQS) models revealed that hydrogen atoms moved towards Cr and away from Ti.
Article
Chemistry, Multidisciplinary
Kei Okamoto, Fumitaka Takeiri, Yumiko Imai, Masao Yonemura, Takashi Saito, Kazutaka Ikeda, Toshiya Otomo, Takashi Kamiyama, Genki Kobayashi
Summary: In this study, a Ba-Li-Na-H-O oxyhydride system was synthesized by partially substituting sodium for lithium in BLHO, leading to a significant improvement in conductivity. Our experimental results demonstrate that substituting at least 40% of lithium with sodium can enhance the conductivity of the oxyhydride system.
Article
Chemistry, Multidisciplinary
Kazutaka Ikeda, Hidetoshi Ohshita, Toshiya Otomo, Kouji Sakaki, Hyunjeong Kim, Yumiko Nakamura, Akihiko Machida, Robert B. Von Dreele
Summary: In situ gas-loading sample holders were developed for two-dimensionally arranged detectors in time-of-flight neutron total scattering experiments, enabling investigation of atomic arrangements during deuterium absorption with time and real-space resolution. The high-resolution transient measurements detected deuterium absorption by palladium within a few seconds, while a double-layered container allowed for experiments at 423 K and 10 MPa hydrogen gas pressure. The deuterium occupation sites in a lanthanum-nickel-aluminium alloy were discussed based on real-space high-resolution data obtained from in situ neutron scattering measurements and reverse Monte Carlo structural modeling.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Chemistry, Physical
Kei Okamoto, Fumitaka Takeiri, Yumiko Imai, Masao Yonemura, Takashi Saito, Kazutaka Ikeda, Toshiya Otomo, Takashi Kamiyama, Genki Kobayashi
Summary: In this study, we report the aliovalent partial substitution of Ba with K in Ba-Li oxyhydride, which results in structural phase transitions and high H- conductivity. The phase transition temperatures are lowered by approximately 50 degrees C via 15% K/Ba substitution, leading to a high conductivity at lower temperatures.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Peng Wu, Kang Xia, Kunling Peng, Takashi Honda, Kazutaka Ikeda, Fengguang Liu, Pierre Vallobra, Fengren Fan, Jiuhui Song, Deming Zhang, Fanghang Yu, Jianjun Ying, Fengfeng Zhu, Toshiya Otomo, Takashi Kamiyama, Weisheng Zhao
Summary: Recently, SnS has been identified as a promising thermoelectric material due to its environmentally friendly and earth abundant elements. Through systematic studies of crystal structures and lattice vibrations using neutron total scattering, Raman scattering measurements, and first-principle calculations, researchers observed a structural transition and lattice anharmonicity in SnS. Experimental evidence and frozen phonon calculations confirmed the presence of quartic anharmonicity potential in high-energy optical modes vibrating along the b axis, contributing to a better understanding of thermal conduction in SnS for enhancing its thermoelectric performance.
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)
