Article
Materials Science, Ceramics
Chuanqi Liu, Dingyu Yang, Haibo Tian, Wen Zhang, Jun Zhu
Summary: It has been found that doping Sr into CsPbX3 perovskites can improve the photoresponse performance and reduce the Pb content for environmental protection. By investigating the effects of Sr doping concentration, it was found that Sr doping increased the density of CsPbBr3 thick films and modulated their bandgap. CsPb1-xSrxBr3 exhibited good optical responses under different bias voltages and X-ray doses. The X-ray response improved with increasing Sr doping concentration. Therefore, partially substituting Sr into CsPbBr3 is a feasible method for reducing Pb content in X-ray detectors. Furthermore, the development of CsPb1-xSrxBr3 thick films provides a new strategy for X-ray detection.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Peter Sichman, Roman Stoklas, Stanislav Hasenohrl, Dagmar Gregusova, Milan Tapajna, Boris Hudec, Stefan Hascik, Tamotsu Hashizume, Ales Chvala, Alexander Satka, Jan Kuzmik
Summary: This study investigates vertical GaN transistors with a semi-insulating channel layer and a C doping of 1 x 10^17 cm(-3). The structures are grown using metal-organic chemical vapor deposition on conductive GaN substrates. The transistors demonstrate normally off behavior and an on/off ratio of 10^7 at a gate bias of -2 V, with an open channel drain current of 30 mA at a gate bias of 4 V.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Mikolaj Amilusik, Marcin Zajac, Tomasz Sochacki, Boleslaw Lucznik, Michal Fijalkowski, Malgorzata Iwinska, Damian Wlodarczyk, Ajeesh Kumar Somakumar, Andrzej Suchocki, Michal Bockowski
Summary: The co-doping of manganese and carbon in gallium nitride crystals grown by halide vapor phase epitaxy was investigated in terms of their structural, optical, and electrical properties. The results showed the significant roles of manganese and carbon in the co-doped gallium nitride crystals.
Article
Physics, Applied
Liqiang Tian, Guangcheng Sun, Dong Jing, Cong Pan, Zeen Ran, Wei Shi, Chao Zhang
Summary: Theoretical calculations on undoped semi-insulating GaAs at temperatures ranging from 5 to 500 K revealed that the peak value of electron mobility reached 11.4 x 10(5) cm(2) V-1 s(-1) at 27 K, while the peak value of dark resistivity was approximately 1.29 x 10(12) ohm cm at 154 K. Various scattering processes and material properties have a significant impact on the performance of semiconductor materials.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Aadil Waseem, Muhammad Ali Johar, Ameer Abdullah, Indrajit Bagal, Jun-Seok Ha, June Key Lee, Sang-Wan Ryu
Summary: This study introduces wearable piezoelectric nanogenerators based on GaN:Mg and GaN:Mg/ZnO nanowires, showing high voltage and current outputs. By adjusting the nanowire diameter, incorporating Mg as a dopant, and depositing a ZnO shell, the researchers successfully enhanced the performance of the nanogenerators.
Article
Engineering, Electrical & Electronic
Yiwei Li, Wenyu Zhang, Kun Cao, Yang Li, Gangqiang Zha, Tingting Tan
Summary: CdZnTe polycrystalline films were grown on TFT circuit boards and ITO/TFT substrates using the close-spaced sublimation (CSS) technique in this study. The phase, morphology, and structure of the CZT polycrystalline film were characterized, and the cracking mechanism of CZT film deposited on TFT circuit boards was investigated. The results indicated that high substrate temperatures caused stress release between the Al film and ITO film, leading to CZT film detachment. Additionally, the presence of SiNx on TFT circuit boards facilitated the rupture of CZT film.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Physics, Multidisciplinary
Qun-Si Yang, Qing Liu, Dong Zhou, Wei-Zong Xu, Yi-Wang Wang, Fang-Fang Ren, Hai Lu
Summary: Alpha particle radiation detectors with planar double Schottky contacts were fabricated on 5-mu m-thick epitaxial semi-insulating GaN:Fe film. The detectors showed stable performance at high bias and potential reliability at high temperature.
Article
Physics, Condensed Matter
Zhen-kai Xie, Xu Chen, Jian-gang Guo
Summary: In this study, we report the structure, electrical and magnetic properties of Ba(Mn1-xCrx)(2)As-2 and Ba0.8K0.2(Mn1-xCrx)(2)As-2 compounds. By doping Cr in the BaMn2As2 semiconductor, the resistivity can be greatly decreased without changing the structural symmetry. XPS and Hall measurements show that the doped Cr has a valence state of +3, which effectively introduces electron carriers. Additionally, a magnetic transition is observed at low temperature, originating from the change in spin re-orientation from ideal antiferromagnetic to canted antiferromagnetic state.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Crystallography
Yun Lai, Ding Wang, Qinhao Kong, Xiaoju Luo, Jinfeng Tang, Rensuo Liu, Fei Hou, Xianying Wang, Troy J. Baker
Summary: Four-inch semi-insulating free-standing gallium nitride (GaN) wafers grown by hydride vapor phase epitaxy (HVPE) with carbon doping were obtained through a self-separated process. The as-grown wafer thickness can reach 900 mu m without cracks, and x-ray diffraction rocking curves show low FWHMs. The measured resistivity was greater than 10(10) Omega-cm.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Chemistry, Analytical
Adriano Cola, Lorenzo Dominici, Antonio Valletta
Summary: This study demonstrates the optical doping functionalities achieved by manipulating the interaction between deep levels and free carriers in semi-insulating CdTe diodes. A line-shaped optical beam focused on the cathode contact area induces a stable and controllable space charge, which can be imaged in real-time through the Pockels effect. A simple method is proposed to retrieve the two-dimensional electric field components. Numerical simulations confirm the experimental findings and provide insights into the underlying mechanism and critical parameters enabling the optical writing functionalities.
Article
Instruments & Instrumentation
Ali Murteza Altingun, Emrah Kalemci
Summary: This study aimed to investigate the influence of different electrode widths on the performance of CdZnTe detectors, analyzing parameters such as steering electrode bias, energy resolution, and charge sharing effect through simulations and experiments. Results showed that the detector performed best at a steering electrode bias of -50 V, the energy resolution performance decreased with increasing steering electrode width, and the charge sharing effect became more pronounced.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Instruments & Instrumentation
A. Sagatova, V. Krsjak, S. Sojak, O. Riabukhin, E. Kovacova, B. Zatko
Summary: This study investigated the radiation degradation of semi-insulating GaAs detectors by 8 MeV electrons up to doses of 1500 kGy, evaluating the impact on GaAs material parameters and the properties of fabricated detectors. The results showed that as the dose increased, the electrical and spectral properties of the detectors were affected, exhibiting different characteristic changes at 1000 kGy and 1500 kGy.
JOURNAL OF INSTRUMENTATION
(2021)
Article
Chemistry, Multidisciplinary
Ling-Ling Zhou, Gang Wu, Jie Liu, Xi-Bin Yu
Summary: The utilization of Ga3+:ZnO quantum dots has been shown to effectively enhance the optoelectronic properties of Si solar cells, leading to improved photoelectric conversion efficiency.
Article
Agricultural Engineering
Yuxin Liu, Tianye Wang, Ningning Song, Quanying Wang, Ying Zeng, Shaoqing Zhang, Hongwen Yu
Summary: A novel hydrochar material, Fe3-SNHC, containing ferrous disulfide (FeS2) and iron nitride (FeN), was prepared via a one-pot hydrothermal method. Fe3-SNHC showed high adsorption and reduction capacities for Cr(VI), as well as good tolerance to coexisting anions at pH 2. Multiple active sites formed by interactions between heteroatoms improved the chemical inertness of the hydrochar. The dominant mechanisms involved in Cr(VI) removal were electrostatic adsorption, complexation, and synergistic reduction among multiple active sites.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Anusmita Chakravorty, Debdulal Kabiraj
Summary: This study investigates the quenching of luminescence from neutral vanadium V4+ atoms in vanadium-doped 4H-SiC using controlled defects. The intensity of V4+ related emissions decreases and thermally stimulated current increases with increasing ion fluence. Partial recovery can be achieved through thermal annealing.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(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)