Article
Physics, Multidisciplinary
T. C. H. de Raadt, J. G. H. Franssen, O. J. Luiten
Summary: We have observed subpicosecond electron bunches from an ultracold electron source for the first time. This source is based on near-threshold, two-step, femtosecond photoionization of laser-cooled rubidium gas in a grating magneto-optical trap. Bunch lengths as short as 735 +/- 7 fs (rms) have been measured in the self-compression point of the source by means of ponderomotive scattering of the electrons by a 25 fs, 800 nm laser pulse. The observed temporal structure of the electron bunch depends on the central wavelength of the ionization laser pulse, in agreement with detailed simulations of the atomic photoionization process. This shows that the bunch length limit imposed by the atomic photoionization process has been reached.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Yun Chang Shin, W. Michael Snow, David Baxter, Chen-Yu Liu, Dongok Kim, Younggeun Kim, Yannis K. Semertzidis
Summary: The concept introduces a compact ultracold neutron (UCN) source based on a small-scale, pulsed-proton accelerator, utilizing a supercold moderator around a superfluid He-4 converter near a low-radiation neutron production target to increase UCN production rate. The proposed compact UCN source can achieve a high density of UCNs while maintaining thermal load levels.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Physical
Shunsuke Kenjo, Yasuyuki Ogino, Keisuke Mukai, Mahmoud Bakr, Juro Yagi, Satoshi Konishi
Summary: The study installed a self-sufficient system into the fusion device to reduce the amount of hydrogen isotope fuel gas, with stable discharge voltages maintained during a deuterium-deuterium operation for over 60 minutes. Gas analysis reveals dilution of deuterium fuel due to exchange with absorbed protium, proposing a hydrogen isotope control method and fuel amount for D-T operation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nuclear Science & Technology
Qiong Zhang, Yi Ge, Yu-Lian Li
Summary: The use of radioactive isotopes for formation density measurement poses high risks such as environmental contamination. The use of pulsed neutron sources, known as source-less density, offers a promising alternative with more accurate density measurements. However, the collection of gamma rays during the neutron burst-on period often includes capture gamma rays, which can affect measurement accuracy.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Physics, Nuclear
G. Bison, B. Blau, W. Chen, P. -j. Chiu, M. Daum, C. B. Doorenbos, N. Hild, K. Kirch, V. Kletzl, B. Lauss, D. Pais, I. Rienacker, D. Ries, P. Schmidt-Wellenburg, V. Talanov, G. Zsigmond
Summary: In this study, we determined the production rate of ultracold neutrons (UCN) through superthermal conversion in a solid deuterium (sD2) moderator at the UCN source at the Paul Scherrer Institute (PSI). We found that a low amount of deuterium deposited on the moderator surfaces had a negligible effect on the UCN yield. By comparing calculated UCN yield with measurements, we confirmed our results and provided an absolute characterization of UCN production and transport in the source.
Article
Instruments & Instrumentation
Z. Tang, E. B. Watkins, S. M. Clayton, S. A. Currie, D. E. Fellers, Md T. Hassan, D. E. Hooks, T. M. Ito, S. K. Lawrence, S. W. T. MacDonald, M. Makela, C. L. Morris, L. P. Neukirch, A. Saunders, C. M. O'Shaughnessy, C. Cude-Woods, J. H. Choi, A. R. Young, B. A. Zeck, F. Gonzalez, C. Y. Liu, N. C. Floyd, K. P. Hickerson, A. T. Holley, B. A. Johnson, J. C. Lambert, R. W. Pattie
Summary: This paper reports studies on the Fermi potential and loss per bounce of ultracold neutrons on a deuterated scintillator, which enables its use in a wide variety of applications in fundamental neutron research.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Green & Sustainable Science & Technology
Chunwei Zhang, Dongdong Chai, Yubin Fan, Wenyun Zhang, Meng Yu, Zhenwu Wang, Long Jiang
Summary: The influence of natural convection on the melting process of phase change material (PCM) in a shell-and-tube latent heat storage (STLHS) unit is studied numerically. The study investigates different heat source positions and configurations, and reveals that the circulation vortex formed by natural convection is a dominant factor that affects melting front evolution and the overall heat transfer coefficient. Results show that the heat transfer coefficient decreases sharply in the early stage of melting, but tends to be constant afterward. The STLHS unit with a lower heat source position and a vertical flat-tube configuration demonstrates desirable performance.
Article
Chemistry, Physical
Tristan Gilbert, Akanksha K. Menon, Chris Dames, Ravi Prasher
Summary: Cost-effective decarbonization of heat, the dominant end-use of energy globally, is a grand scientific and technological challenge. Despite its importance, a technoeconomic framework to comparatively evaluate heat sources has not received the same attention as the levelized cost of electricity (LCOE). We develop a generalizable framework for calculating the levelized cost of heat (LCOH) for arbitrary heat sources and heating applications while accounting for carbon mitigation, and provide insights and research directions for future improvements.
Article
Nuclear Science & Technology
Takumi Matsuo, Shunsuke Kenjo, Keisuke Mukai, Juro Yagi, Satoshi Konishi
Summary: A compact cylindrical fusion neutron source has been developed for various applications, such as a D-T fusion neutron source for blanket neutron transport experiments. The external gas supply mode is effective in removing light hydrogen from the electrode surface, thereby suppressing fuel gas dilution.
FUSION ENGINEERING AND DESIGN
(2023)
Article
Thermodynamics
Jae Won Lee, Jong Ha Park, Hyung Won Choi, Yong Tae Kang
Summary: This study investigates the loading of water into the sorbent in combination with ammonia to lower the charging temperature of sorption thermal batteries. Zeolite 13X loaded with water is selected as the working pair and evaluated for its energy storage performance. The results show that the ammonia-sorption thermal battery based on zeolite 13X loaded with water has a high coefficient of performance, making it suitable for addressing the imbalance between demand and supply of renewable energy.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Physics, Nuclear
Pavel D. Grigoriev, Arseniy V. Sadovnikov, Vladislav D. Kochev, Alexander M. Dyugaev
Summary: To increase the storage time of ultracold neutrons (UCNs) in material traps, the idea of covering the trap walls with liquid helium (4He) is proposed. By applying an electric voltage to the rough side walls of the UCN traps, the thickness of liquid helium on the wall edges can be increased, ensuring complete protection of UCNs from absorption inside the trap walls. This improvement may result in the development of new-generation ultracold neutron traps with remarkably long storage time, while also considering the influence of the electric field on the dispersion of ripplons.
Article
Nuclear Science & Technology
Li Zhang, Hua-Wei Yu, Yang Li, Wen-Bao Jia, Xiao Han, Xue-Sen Geng
Summary: This study presents an improved method using a D-D neutron source to measure formation density and removes the lithological effect on the measured density. Through Monte Carlo simulations and experimental validation, the accuracy and feasibility of this method are demonstrated.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Article
Instruments & Instrumentation
Xue-Jie Bai, Yi-Hong Yan, Hong-Yi Lei, Fang-Zheng Sun, Tian-Ze Wang, Chang-Qing Zhu, Jun-Hao Tan, Guang Hu, Yan-Fei Li, Jing-Long Ma, Guo-Qian Liao, Zhe Zhang, Hua-Si Hu, Yu-Tong Li
Summary: The uncertainties of spot size and position in x-ray sources can affect the detecting precision of the x-ray probe beam. This study used the penumbral coded aperture imaging technique to diagnose the spatial distribution of an x-ray emission source spot generated from a Cu solid target irradiated by an intense laser pulse. By utilizing this technique, the spot size and position can be precisely determined.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Astronomy & Astrophysics
Ilias Cholis, Konstantinos Kritos, David Garfinkle
Summary: This article examines the connection between Thorne-Zytkow objects (TZOs) and GW190814-type events. It finds that TZOs in dense stellar clusters cannot explain the rate of such events, but TZOs formed within hierarchical triple systems may be able to provide a comparable rate.
Article
Instruments & Instrumentation
K. Kuk, C. Cude-Woods, C. R. Chavez, J. H. Choi, J. Estrada, M. Hoffbauer, S. E. Holland, M. Makela, C. L. Morris, E. Ramberg, E. R. Adamek, T. Bailey, M. Blatnik, L. J. Broussard, M. A-P Brown, N. B. Callahan, S. M. Clayton, S. Currie, B. W. Filippone, E. M. Fries, P. Geltenbort, F. Gonzalez, M. T. Hassan, L. Hayen, K. P. Hickerson, A. T. Holley, T. M. Ito, C-Y Liu, P. Merkel, R. Musedinovic, C. O'Shaughnessy, R. W. Pattie, B. Plaster, D. J. Salvat, A. Saunders, E. Sharapov, X. Sun, Z. Tang, W. Wei, J. W. Wexler, A. R. Young, Zhehui Wang
Summary: UCN projection imaging demonstrated using boron-coated back-illuminated CCD camera and Los Alamos UCN source. Direct detection of neutron capture byproducts and reduced thermal noise in scientific CCD camera results in significant improvement in signal-to-noise ratio. bCCD with sub-pixel resolution, spatial resolution less than 100 μm, and large area is suitable for quantum science of UCN.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Multidisciplinary Sciences
Nicholas J. Ayres, Zurab Berezhiani, Riccardo Biondi, Georg Bison, Kazimierz Bodek, Vira Bondar, Pin-Jung Chiu, Manfred Daum, Reza Tavakoli Dinani, Cornelis B. Doorenbos, Solange Emmenegger, Klaus Kirch, Victoria Kletzl, Jochen Krempel, Bernhard Lauss, Duarte Pais, Ingo Rienaecker, Dieter Ries, Nicola Rossi, Dagmara Rozpedzik, Philipp Schmidt-Wellenburg, Kazuo S. Tanaka, Jacek Zejma, Nathalie Ziehl, Geza Zsigmond
Summary: The Paul Scherrer Institut (PSI) is conducting a new study on neutron to mirror-neutron oscillations using stored ultracold neutrons. The experiment features a large storage vessel to enhance statistical sensitivity. With the demonstrated performance, the study aims to detect or exclude potential signals consistent with neutron to mirror-neutron oscillations.
Article
Chemistry, Multidisciplinary
Sayani Biswas, Lars Gerchow, Hubertus Luetkens, Thomas Prokscha, Aldo Antognini, Niklaus Berger, Thomas Elias Cocolios, Rugard Dressler, Paul Indelicato, Klaus Jungmann, Klaus Kirch, Andreas Knecht, Angela Papa, Randolf Pohl, Maxim Pospelov, Elisa Rapisarda, Peter Reiter, Narongrit Ritjoho, Stephanie Roccia, Nathal Severijns, Alexander Skawran, Stergiani Marina Vogiatzi, Frederik Wauters, Lorenz Willmann, Alex Amato
Summary: The toolbox for material characterization has expanded greatly, allowing for new possibilities such as 3D-tomography and chemical analysis with the development of Muon Induced X-ray Emission (MIXE) technique.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Pedro Amaro, A. Adamczak, M. Abdou Ahmed, L. Affolter, F. D. Amaro, Patricia Carvalho, T-L Chen, L. M. P. Fernandes, M. Ferro, D. Goeldi, T. Graf, M. Guerra, T. W. Haensch, C. A. O. Henriques, Y-C Huang, P. Indelicato, O. Kara, Klaus Kirch, Andreas Knecht, Franz Kottmann, Y-W Liu, Jorge Machado, M. Marszalek, R. D. P. Mano, C. M. B. Monteiro, F. Nez, J. Nuber, A. Ouf, N. Paul, Randolf Pohl, E. Rapisarda, J. M. F. dos Santos, J. P. Santos, P. A. O. C. Silva, L. Sinkunaite, J-T Shy, K. Schuhmann, S. Rajamohanan, Anna Soter, L. Sustelo, David Taqqu, L-B Wang, Frederik Wauters, P. Yzombard, M. Zeyen, Aldo Antognini
Summary: The CREMA collaboration aims to measure the ground-state hyperfine splitting in muonic hydrogen with high accuracy using pulsed laser spectroscopy. They calculate the combined probability of laser excitation to the triplet state followed by collisional-induced deexcitation back to the singlet state, taking into account decoherence effects and Doppler effects. These calculations help optimize the experimental conditions and define the requirements for the laser system.
Article
Instruments & Instrumentation
N. J. Ayres, G. Ban, G. Bison, K. Bodek, V. Bondar, T. Bouillaud, B. Clement, E. Chanel, P. -j. Chiu, C. B. Crawford, M. Daum, C. B. Doorenbos, S. Emmenegger, A. Fratangelo, M. Fertl, W. C. Griffith, Z. D. Grujic, P. G. Harris, K. Kirch, J. Krempel, B. Lauss, T. Lefort, O. Naviliat-Cuncic, D. Pais, F. M. Piegsa, G. Pignol, G. Rauscher, D. Rebreyend, I. Rienaecker, D. Ries, S. Roccia, D. Rozpedzik, W. Saenz-Arevalo, P. Schmidt-Wellenburg, A. Schnabel, N. Severijns, B. Shen, M. Staab, K. Svirina, R. Tavakoli Dinani, J. Thorne, N. Yazdandoost, J. Zejma, G. Zsigmond
Summary: This article presents the magnetically shielded room (MSR) used in the n2EDM experiment at the Paul Scherrer Institute. The MSR has a cubic volume with dimensions of 2.92 meters on each side, providing 25 cubic meters of accessible space. It features 87 openings with a maximum diameter of 220 mm for operating the experimental apparatus, as well as an intermediate space for housing sensitive signal processing electronics. Characterization measurements show that the remanent magnetic field in the central 1 cubic meter is below 100 pT, and the field is below 600 pT throughout the entire inner volume up to 4 cm from the walls. The quasi-static shielding factor at 0.01 Hz is about 100,000 in all three spatial directions and increases rapidly with frequency to reach 10^8 above 1 Hz.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Physics, Multidisciplinary
Anne Fabricant, Irina Novikova, Georg Bison
Summary: This article serves as a step-by-step guide for optically pumped magnetometers using alkali atomic vapor cells. It provides an introduction to atomic magneto-optical response and magnetometer performance merits, and discusses the impact of main sources of noise. It also compares different magnetometer implementations and offers a practical design process and analysis using real magnetometer data.
NEW JOURNAL OF PHYSICS
(2023)
Article
Instruments & Instrumentation
Manuel Zeyen, Lukas Affolter, Marwan Abdou Ahmed, Thomas Graf, Oguzhan Kara, Klaus Kirch, Miroslaw Marszalek, Francois Nez, Ahmed Ouf, Randolf Pohl, Siddharth Rajamohanan, Pauline Yzombard, Aldo Antognini, Karsten Schuhmann
Summary: The PDH technique is commonly used to stabilize the frequency of a laser to a stable optical resonator or vice versa. We propose an enhanced version of this technique that offers an infinite dynamic range, ensuring correct lock even after significant perturbations. By phase modulating the seed laser at a frequency corresponding to half the resonator's free spectral range, we eliminate the stable but off-resonant lock points present in conventional PDH error signals. We experimentally verify the effectiveness of our scheme using an injection-seeded Yb:YAG thin-disk laser and provide an analytical formulation for the PDH error signal with arbitrary modulation frequencies.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Physics, Nuclear
G. Bison, B. Blau, W. Chen, P. -j. Chiu, M. Daum, C. B. Doorenbos, N. Hild, K. Kirch, V. Kletzl, B. Lauss, D. Pais, I. Rienacker, D. Ries, P. Schmidt-Wellenburg, V. Talanov, G. Zsigmond
Summary: In this study, we determined the production rate of ultracold neutrons (UCN) through superthermal conversion in a solid deuterium (sD2) moderator at the UCN source at the Paul Scherrer Institute (PSI). We found that a low amount of deuterium deposited on the moderator surfaces had a negligible effect on the UCN yield. By comparing calculated UCN yield with measurements, we confirmed our results and provided an absolute characterization of UCN production and transport in the source.
Article
Optics
A. Antognini, P. Crivelli, L. Gerchow, T. D. Hume, K. Kirch, A. Knecht, J. Nuber, A. Papa, N. Ritjoho, M. Sakurai, A. Soter, D. Taqqu, S. M. Vogiatzi, J. Zhang, L. Ziegler
Summary: In this article, muonium production at different temperatures and muonium-helium collisions are investigated. Compact detection schemes are developed to observe atomic muonium in vacuum. The conversion efficiency and characteristics of the superfluid helium converter are determined.
Article
Optics
C. Abel, N. J. Ayres, G. Ban, G. Bison, K. Bodek, V Bondar, E. Chanel, P-J Chiu, B. Clement, C. B. Crawford, M. Daum, S. Emmenegger, L. Ferraris-Bouchez, M. Fertl, P. Flaux, A. Fratangelo, W. C. Griffith, Z. D. Grujie, P. G. Harris, L. Hayen, N. Hild, M. Kasprzak, K. Kirch, P. Knowles, H-C Koch, P. A. Koss, A. Kozela, J. Krempel, B. Lauss, T. Lefort, Y. Lemiere, P. Mohanmurthy, O. Naviliat-Cuncic, D. Pais, F. M. Piegsa, G. Pignol, P. N. Prashanth, G. Quemener, M. Rawlik, D. Ries, D. Rebreyend, S. Roccia, D. Rozpedzik, P. Schmidt-Wellenburg, A. Schnabel, N. Severijns, J. A. Thorne, R. Virot, A. Weis, E. Wursten, G. Wyszynski, J. Zejma, G. Zsigmond
Summary: Experiments measuring the electric dipole moment of the neutron require precise control of magnetic-field uniformity. The nEDM experiment at the Paul Scherrer Institute uses a co-magnetometer to monitor magnetic-field variations, but it introduces the largest systematic error. Offline measurements were performed to evaluate and correct this effect, leading to an improvement in the neutron electric dipole moment measurement.
Article
Physics, Nuclear
G. Bison, M. Daum, K. Kirch, B. Lauss, D. Ries, P. Schmidt-Wellenburg, G. Zsigmond
Summary: Efficient neutron transport is crucial for the performance of ultracold neutron sources. The present study focuses on absolute UCN transport efficiency and reports complementary measurements on UCN density and transmission through a UCN guide section.
EUROPEAN PHYSICAL JOURNAL A
(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)