Article
Computer Science, Software Engineering
George S. Evans, Joseph M. Watkins, Chase N. Taylor, Jagoda Urban-Klaehn, Chuting T. Tsai
Summary: Coincidence Doppler Broadening (CDB) Positron Annihilation Spectroscopy (PAS) is a non-destructive material analysis technique used to measure characteristics of structural defects in samples. The Coincidence Doppler Broadening Analysis Program (CDB-AP) is a graphical user interface that allows for rapid analysis of large datasets.
Article
Instruments & Instrumentation
Leon Chryssos, Christoph Hugenschmidt
Summary: Coincidence Doppler Broadening Spectroscopy (CDBS) can reveal the elemental signature at the annihilation site in matter, and can be used to analyze foreign atoms, vacancy-solute complexes, and precipitates in solids. Due to the lack of a comprehensive program for the analysis of CDBS data, a modular python-based open source software solution was developed to extract the annihilation line reliably and provide ratio curves highlighting the elemental signature in the spectra. The new program allows the readout and averaging of multiple detector pairs, and implements an improved algorithm to significantly reduce the background at high Doppler shifts.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Physics, Multidisciplinary
R. Dominguez-Reyes, A. Rodriguez-Lopez
Summary: High-purity sulfur and selenium samples were studied using Coincidence Doppler Broadening spectroscopy, and their ratio curves relative to aluminum were obtained. The position of the first maximum in each ratio curve distribution was added to previous data to analyze the tendencies of elements with respect to atomic number Z, providing reference background knowledge for understanding Positron Annihilation Spectroscopy studies involving materials containing sulfur or selenium.
ROMANIAN JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Physical
Chase N. Taylor, Jagoda Urban-Klaehn, Thuy T. Le, Radoslaw Zaleski, Jeffrey D. Rimer, Kevin L. Gering
Summary: The study investigates the aging characteristics of catalysts using positron annihilation spectroscopy, tracking the evolution of microstructures in zeolite catalysts during deactivation. Results show that as the reaction progresses, zeolite nanopores decrease in size while mesopores increase, indicating a change in defect structure. The technique's sensitivity to different pore structures suggests it may be useful for heterogeneous catalysis studies.
Article
Polymer Science
Katarina Cifranicova, Ondrej Sausa, David Pavel Kralovic, Helena Svajdlenkova
Summary: This study investigated a commercial photopolymer mixture using positron annihilation spectroscopy (PALS), near infrared spectroscopy (NIR), and bulk density measurements to study microstructural free volume, which affects material properties. It was found that 0.5 mol% of photoinitiator (PI) is sufficient to achieve similar microstructures for 2 mm and 5 mm-thick samples. The thickness and amount of PI were found to have an impact on the free volume characteristics, which correlated with bulk density, monomer conversion, and H bonded interactions determined from NIR. Spatial graded microstructural study revealed more pronounced differences with increased PI amount and reduced thickness.
Article
Physics, Applied
Juanmei Duan, Maciej O. Liedke, Wojciech Dawidowski, Rang Li, Maik Butterling, Eric Hirschmann, Andreas Wagner, Mao Wang, Lawrence Boyu Young, Yen-Hsun Glen Lin, Minghwei Hong, Manfred Helm, Shengqiang Zhou, Slawomir Prucnal
Summary: In this study, the effect of intense pulsed light melting on defect distribution and activation efficiency in chalcogenide-implanted GaAs was investigated. The results showed that after nanosecond pulsed light melting, the main defects in heavily doped GaAs are gallium vacancies decorated with chalcogenide atoms substituting As.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Spectroscopy
R. W. Gladen, V. A. Chirayath, P. A. Sterne, A. J. Fairchild, A. R. Koymen, A. H. Weiss
Summary: The study utilized positron annihilation induced Auger-gamma coincidence spectroscopy to investigate the mechanisms of low energy electron emission from bilayer graphene on a copper substrate. The experimental results demonstrated the effectiveness of the method in resolving the Doppler-broadened annihilation gamma spectrum from surfaces, allowing for characterization of the chemical composition of the topmost atomic layer of porous materials.
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
(2021)
Article
Materials Science, Multidisciplinary
V. Chatzikos, K. Mergia, G. Bonny, D. Terentyev, D. Papadakis, G. E. Pavlou, S. Messoloras
Summary: In this study, the evolution of open volume defects in neutron irradiated tungsten materials was investigated using positron annihilation spectroscopy. The results showed that neutron irradiation resulted in the formation of dislocations and voids in all tungsten grades, and the density of dislocations and voids decreased with increasing irradiation temperature, while the void size increased.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Luca Chiari, Kenji Kojima, Yusuke Endo, Hiroki Teshigahara, Maik Butterling, Maciej Oskar Liedke, Eric Hirschmann, Ahmed G. Attallah, Andeas Wagner, Masanori Fujinami
Summary: The formation and evolution of hydrogen-induced defects in nickel were investigated using positron annihilation lifetime spectroscopy, revealing that hydrogen addition at room temperature can lead to the formation of a large number of atomic vacancies. These defects in nickel agglomerate into large vacancy clusters during room temperature aging, demonstrating the primary role of hydrogen in the formation and stabilization of vacancies.
Article
Chemistry, Applied
Tong Song, Peng Zhang, Chao Zhang, Liliang Gong, Xingzhong Cao, Baoyi Wang, Runsheng Yu, Wei Zhou
Summary: The pore structure of PEI/SBA-15 nanocomposites was investigated using PALS, TEM, XRD, and N2 adsorption and desorption techniques. The results showed that PALS could provide information about the micropores and mesopores in the SBA-15 matrix. The size of the micropores and mesopores obtained from theoretical models was slightly smaller than that obtained from N2 adsorption and desorption techniques due to the presence of open micropores in the channels. This study provides a unique tool for understanding the evolution of nanometer-sized pores and the relationship between the material structure and CO2 adsorption capacity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Paper & Wood
Laura Resch, Anna Karner, Wolfgang Sprengel, Roland Wuerschum, Robert Schennach
Summary: This study applied the experimental technique of positron annihilation lifetime spectroscopy (PALS) to monitor the microstructural changes of cellulose-based materials, such as paper, during water intake. Results showed that the mean positron lifetime increased with time in humid atmosphere, with different trends depending on the type of cellulose sample. The study demonstrated that water transport in paper can be reliably followed over a long timespan using PALS, and even distinguish between different types of cellulose materials based on the observed changes in positron lifetime.
Article
Physics, Applied
Sayantan Sil, Sudipta Moshat, Partha Pratim Ray, Joydeep Dhar, Dirtha Sanyal
Summary: This study reports the reversible and/or irreversible lattice defects in methylammonium lead iodide perovskites under different bias voltages, with electrical measurements and positron annihilation spectroscopy supporting the formation of p/n junctions at metal/semiconductor interfaces. Lower bias voltages lead to reversible lattice defects, while beyond a threshold voltage, the defects become permanent as observed by positron annihilation spectroscopy.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Tianjiao Wang, Te Zhu, Dandan Wang, Peng Zhang, Yamin Song, Fengjiao Ye, Qianqian Wang, Shuoxue Jin, Runsheng Yu, Fuyan Liu, Peng Kuang, Baoyi Wang, Liben Li, Xingzhong Cao
Summary: In this study, the evolution of vacancy-like defects and the formation of brittle precipitates in a reduced-activation V-Cr-Mn medium-entropy alloy were investigated. Various characterization techniques were used to study the local electronic circumstances, vacancy defects, and CrMn3 precipitates. The results showed that the Mn and Cr enrichments dissolved into the matrix at high temperatures and formed as CrMn3 precipitates at elevated temperatures. The vacancy defects mediated the migration of Cr and Mn, leading to the formation of CrMn3 precipitates.
Article
Physics, Particles & Fields
Yohei Ema, Filippo Sala, Ryosuke Sato
Summary: This study proposes a model of Dark Matter to explain the 511 keV photon emission from the Galactic Center, with potential for testing by various experiments and surveys.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Review
Chemistry, Physical
Vladimir Krsjak, Jarmila Degmova, Pavol Noga, Martin Petriska, Stanislav Sojak, Matus Saro, Igor Neuhold, Vladimir Slugen
Summary: Positron annihilation spectroscopy (PAS) is widely recognized as a powerful characterization technique in radiation damage studies, with applications now focused on ion implantation experiments to simulate future nuclear reactor environments. Researchers face challenges from a variety of experimental conditions such as ion energies and irradiation temperatures.
Article
Materials Science, Multidisciplinary
Aygul A. Mukhametgalina, Mariya A. Murzinova, Ayrat A. Nazarov, Asiya A. Samigullina, Milos Janecek, Josef Strasky, Kristina Bartha, Jakub Cizek
Summary: The microstructure and room temperature mechanical properties of alpha-titanium alloy Ti-5Al-0.5 V subjected to equal channel angular pressing (ECAP) and subsequent ultrasonic treatment (UST) were studied. The results showed that UST had little impact on dislocation density and vacancy concentration, and did not significantly affect the mechanical properties of the ECAP-ed titanium alloys.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Artem Musiienko, Jakub Cizek, Hassan Elhadidy, Petr Praus, Kate Higgins, Bogdan Dryzhakov, Andrii Kanak, Franck Sureau, Jindrich Pipek, Eduard Belas, Marian Betusiak, Mykola Brynza, Eric Lukosi, Bin Hu, Mahshid Ahmadi
Summary: The study found that both hybrid and all-inorganic MHPs exhibit low concentrations of vacancies regardless of their synthesis method, with crystals grown from solution prone to solvent inclusion during synthesis.
CHEMISTRY OF MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Kaveh Edalati, Andrea Bachmaier, Victor A. Beloshenko, Yan Beygelzimer, Vladimir D. Blank, Walter J. Botta, Krzysztof Bryla, Jakub Cizek, Sergiy Divinski, Nariman A. Enikeev, Yuri Estrin, Ghader Faraji, Roberto B. Figueiredo, Masayoshi Fuji, Tadahiko Furuta, Thierry Grosdidier, Jeno Gubicza, Anton Hohenwarter, Zenji Horita, Jacques Huot, Yoshifumi Ikoma, Milos Janecek, Megumi Kawasaki, Petr Kral, Shigeru Kuramoto, Terence G. Langdon, Daniel R. Leiva, Valery Levitas, Andrey Mazilkin, Masaki Mito, Hiroyuki Miyamoto, Terukazu Nishizaki, Reinhard Pippan, Vladimir V. Popov, Elena N. Popova, Gencaga Purcek, Oliver Renk, Adam Revesz, Xavier Sauvage, Vaclav Sklenicka, Werner Skrotzki, Boris B. Straumal, Satyam Suwas, Laszlo S. Toth, Nobuhiro Tsuji, Ruslan Z. Valiev, Gerhard Wilde, Michael J. Zehetbauer, Xinkun Zhu
Summary: This article comprehensively reviews recent advances in the development of ultrafine-grained and nanostructured materials through severe plastic deformation and provides a brief history of this field. Severe plastic deformation methods have been effective in producing materials with advanced mechanical and functional properties, and the field of NanoSPD has experienced significant progress in the past two decades.
MATERIALS RESEARCH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Wanchai Deeloed, Tatiana Priamushko, Jakub Cizek, Songwut Suramitr, Freddy Kleitz
Summary: In this study, defect-rich ordered mesoporous spinel oxides were developed as bifunctional electrocatalysts for oxygen reduction and evolution reactions (ORR and OER). Chemical treatment with a NaBH4 solution enhanced the defect concentration and contributed to improved catalytic activity. The results provide insights into the development of highly active electrocatalysts through defect engineering methods.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Tomas Vlasak, Jakub Cizek, Oksana Melikhova, Frantisek Lukac, Dalibor Preisler, Milos Janecek, Petr Harcuba, Mariia Zimina, Ondrej Srba
Summary: In this study, a series of high-entropy alloys based on refractory metals were systematically investigated. It was found that a bcc single-phase solid solution can be formed at high temperatures, but phase separation occurs at lower temperatures. However, a metastable single-phase solid solution can be preserved at room temperature through rapid cooling. Moreover, the mechanical properties of annealed and as-cast alloys were found to be comparable.
Article
Materials Science, Multidisciplinary
J. Cizek, O. Melikhova, T. Vlasak, P. Hruska, D. Stary, F. Lukac
Summary: Severe lattice distortions are inherent features of complex concentrated alloys (CCAs) and play a key role in their extraordinary properties. Experimental results show that the bulk positron lifetime increases with the magnitude of lattice distortions, indicating that positrons can be used as probes of lattice distortions in CCAs.
Article
Multidisciplinary Sciences
Petr Praus, Lenka Rehackova, Jakub Cizek, Aneta Smykalova, Martin Kostejn, Jiri Pavlovsky, Miroslava Filip Edelmannova, Kamila Koci
Summary: This study synthesized C3N4 from nitrogen-rich precursors, forming vacancy complexes that are beneficial for hydrogen generation, and the photocatalyst exhibited higher performance than bulk C3N4 synthesized in air.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Michal Leibner, Martin Vlach, Veronika Kodetova, Jozef Vesely, Jakub Cizek, Hana Kudrnova, Frantisek Lukac
Summary: The development of microstructure in an Al-Sc-Er-Zr alloy during aging at 600 degrees C was investigated. It was found that Sc atoms segregate at dislocations, and two different structures of precipitates were observed.
Article
Materials Science, Multidisciplinary
Noriaki Kosaka, Jakub Cizek
Summary: The interface structure of semicoherent titanium carbide (TiC) nanoparticles and incoherent micron-sized TiC precipitates in Fe-C-Ti alloy hot-rolled steel sheets was studied using transmission electron microscopy (TEM) and positron annihilation spectrometry (PAS). The study found that the interface between TiC nanoparticles and the matrix is semicoherent, while the interface between micron-sized TiC precipitates and the matrix is incoherent. Measurement of positron lifetime revealed the presence of misfit defects at both interfaces.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Alice Hospodkova, Jakub Cizek, Frantisek Hajek, Tomas Hubacek, Jiri Pangrac, Filip Dominec, Karla Kuldova, Jan Batysta, Maciej O. Liedke, Eric Hirschmann, Maik Butterling, Andreas Wagner
Summary: A set of GaN layers prepared by metalorganic vapor phase epitaxy under different technological conditions were investigated using variable energy positron annihilation spectroscopy to find a link between technological conditions, GaN layer properties, and the concentration of gallium vacancies (V-Ga). Different correlations between technological parameters and V-Ga concentration were observed for layers grown from different gallium precursors.
Article
Chemistry, Physical
Lenka Volfova, Stefan Andrei Irimiciuc, Sergii Chertopalov, Petr Hruska, Jakub Cizek, Martin Vondracek, Michal Novotny, Maik Butterling, Maciej Oskar Liedke, Andreas Wagner, Jan Lancok
Summary: The influence of oxygen pressure on the structural and physical properties of various copper oxide phases grown by Pulsed Laser Deposition (PLD) on MgO (100) was investigated. Positron annihilation spectroscopy revealed the presence of positrons trapped at vacancies and large vacancy clusters with lifetimes ranging from 400 ps to 500 ps. Single copper vacancies were found in the CuO phase, while copper vacancy complexes coupled with oxygen vacancies were observed in the Cu2O phase. Suitable O-2 atmosphere conditions that induced a mixture of copper oxide phases were identified. In situ diagnostic techniques based on Optical Emission Spectroscopy and Langmuir Probe were used to monitor the deposition process and correlate with film properties.
APPLIED SURFACE SCIENCE
(2023)
Article
Astronomy & Astrophysics
Jan Wild, Jakub Cizek, Libor Nouzak, Jiri Pavlu, Jana Safrankova, Zdenek Nemecek, Jakub Vaverka, Dalibor Nosek, Tomas Burian, Anna Wildova, Jan Broulim
Summary: We present the first laboratory experiment investigating the interaction between a cosmic dust simulant and positrons emitted from a Na-22 radioisotope. By accurately measuring the charge of micrometer-sized SiO2 dust grains, we observed +1 e steps, indicative of positron annihilation inside the grain. The rate of these charging events aligns well with predictions from a model based on the continuous slowing down approximation of energetic positrons within the grain. Additionally, we attributed less frequent charging steps larger than +1 e to the emission of secondary electrons during the positron slowing down process. The coefficient of secondary electron emission was found to be approximately inversely proportional to the grain radius. Based on our experimental findings, we propose a potential scenario for charging in interstellar dark clouds.
ASTROPHYSICAL JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
O. Zivotsky, Y. Jiraskova, J. Bursik, D. Janickovic, J. Cizek
Summary: The structure and magnetic properties of Mn2FeSi alloy, a potential Heusler material, were studied using rapid solidification technology. It was found that the as-prepared Mn2FeSi ribbon exhibited paramagnetism at room temperature and had a cubic structure with a lattice parameter of 0.567 nm. The presence of other phases at low temperatures affected the structural and physical properties of the sample after annealing.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jan Zich, Martin Misek, Vaclav Holy, Karel Carva, Jakub Cizek, Jiri Navratil, Patrik Cermak, Petr Knotek, Katerina Cermak Sraitrova, Stanislav Cichon, Jiri Hejtmanek, Zdenek Jirak, Cestmir Drasar
Summary: Fe-intercalated Bi2Se3 single crystals exhibit unique physical properties, including superconductivity, pronounced Shubnikov-de Haas oscillations, and high carrier mobility. These properties are correlated with the structural properties and point defects of the crystals. The study suggests that the inhomogeneous distribution of defects in the sample volume may be responsible for the interesting properties of Bi2Se3.
Article
Materials Science, Multidisciplinary
Marc Wenskat, Jakub Cizek, Maciej Oskar Liedke, Maik Butterling, Martin Stiehl, Guilherme Dalla Lana Semione, Constanze Backes, Christopher Bate, Oksana Melikhova, Eric Hirschmann, Andreas Wagner, Hans Weise, Andreas Stierle, Martin Aeschlimann, Wolfgang Hillert
Summary: Superconducting radio-frequency (SRF) cavities have shown potential as qubits for quantum computing and are crucial components in modern particle accelerators. Recent research has found that temperature treatment can improve their performance by reorganizing the niobium oxide and near-surface vacancy structure.
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)
