Article
Chemistry, Multidisciplinary
Teng- Yang, Yuen Yung Hui, Jen-Iu Lo, Yu-Wen Huang, Yin-Yu Lee, Bing-Ming Cheng, Huan-Cheng Chang
Summary: This study demonstrates the use of fluorescent nanodiamonds (FNDs) with nitrogen-vacancy (NV) centers as scintillators for imaging and characterizing extreme ultraviolet (EUV) radiation. The FNDs form a stable thin film and can emit bright red fluorescence when excited by EUV light. An FND-based imaging device has been developed for beam diagnostics of synchrotron radiations.
Article
Environmental Sciences
Anatoliy A. Nusinov, Tamara V. Kazachevskaya, Valeriya V. Katyushina
Summary: This paper discusses the importance of understanding and utilizing ultraviolet radiation fluxes from the Sun in modeling the upper atmosphere and ionospheres based on mathematical descriptions of physical processes. It presents aeronomic models of variations in extreme and far ultraviolet radiation, and compares the model calculations with observations to show the accuracy of the models in predicting parameters of the ionosphere and thermosphere.
Article
Biochemical Research Methods
Alexander Potthoff, Olaf Minte, Klaus Dreisewerd, Jens Soltwisch
Summary: This study investigates the ionization mechanisms of postionization (PI) in MALDI-2 and conducts experiments using two lasers with different pulse durations. The results show that the ion signal intensity has a quadratic dependency on the pulse energy, and shorter pulses produce higher ion signal intensities due to higher photon density. Comparative measurements allow the determination of the excited state lifetime of the matrices used.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2022)
Article
Thermodynamics
Qiang Xu, Bingzhi Liu, Weiye Chen, Tongpo Yu, Zunhua Zhang, Cheng Zhang, Lixia Wei, Zhandong Wang
Summary: The study developed a JSR system coupled with SVUV-PIMS and GC analysis, which allows for complementary analysis and cross-checking by different methods to improve the accuracy and fidelity of experimental data. This newly developed experimental method enables simultaneous and comprehensive measurement of fuel low-temperature oxidation products, providing a valuable tool for studying fuel low-temperature oxidation chemistry, revealing species pools, and developing combustion models.
COMBUSTION AND FLAME
(2022)
Article
Physics, Condensed Matter
Vladimir Pankratov, Viktorija Pankratova, Anatoli I. Popov
Summary: Vacuum ultraviolet excitation spectroscopy is a powerful tool for investigating luminescence properties of wide bandgap nanocrystalline phosphor materials. Selective excitation in a wide spectral range allows exploration of different luminescence processes in nanophosphors. The size-dependent luminescence properties of nanophosphors become significant when the electron thermalization length exceeds the nanoparticle size.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Review
Spectroscopy
Xuelu Ding, Kun Liu, Zhenyan Shi
Summary: Laser desorption/ablation postionization (LD/API) techniques have been rapidly developing in the field of mass spectrometry, offering solutions to ionization of neutral substances and showing potential in breakthroughs in bioanalytical applications.
MASS SPECTROMETRY REVIEWS
(2021)
Article
Astronomy & Astrophysics
Jen-Iu Lo, Rana Ghosh, Hsiao-Chi Lu, Wei-Hsiu Hung, Bing-Ming Cheng
Summary: The thermal variation of absorption spectra of icy ethene was measured from 13 to 100 K, showing that ethene ices might exhibit three structures within the temperature range of 13-60 K. This study enhances our understanding of the spectra of icy ethene at low temperatures and astrochemistry in cold astro-environments.
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2021)
Article
Food Science & Technology
Laetitia Theron, Aline Bonifacie, Jeremy Delabre, Thierry Sayd, Laurent Aubry, Philippe Gatellier, Christine Ravel, Christophe Chambon, Thierry Astruc, Jacques Rouel, Veronique Sante-Lhoutellier, Matthieu Refregiers, Frank Wien
Summary: Food processing can impact the structure and chemical state of proteins, potentially leading to oxidation and impairment of properties, affecting protein digestibility. This study aims to understand how oxidative processes influence the structure and activity of pepsin during digestion.
Article
Thermodynamics
Tongpo Yu, Qiang Xu, Hong Wang, Cheng Xie, Jiwen Guan, Xiaoguo Zhou, Zhandong Wang
Summary: An in-depth investigation of the thermal decomposition mechanism of n-pentyl nitrate was conducted through experimental and computational studies. Intermediate products and mechanisms were identified using synchrotron radiation vacuum ultraviolet photoionization and quantum chemical calculations. The results suggest that both bond fission and hydrogen migration play important roles in the pyrolysis of n-pentyl nitrate.
COMBUSTION AND FLAME
(2023)
Article
Thermodynamics
Weiye Chen, Qiang Xu, Hao Lou, Qimei Di, Cheng Xie, Bingzhi Liu, Jiuzhong Yang, Herve Le Gall, L. S. Tran, Xudi Wang, Zongyu Xia, Olivier Herbinet, Frederique Battin-Leclerc, Zhandong Wang
Summary: Low temperature oxidation chemistry is important in the auto-ignition process of internal combustion engines. This study develops a variable pressure jet-stirred reactor (VPJSR) platform and probes intermediates using synchrotron vacuum ultraviolet photoionization mass spectrometry. The setup is validated by repeating experiments and shows good agreement with literature data. The VP-JSR system is valuable for studying fuel chemistry and guiding the development of reaction systems at high pressures.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Analytical
Jiu-Jie Kuang, Zhen-Yu Tian, Du Wang, Kai-Ru Jin, Bing Qian, Yang Pan
Summary: This study utilized an online synchrotron radiation photoionization mass spectrometry to investigate the dynamic processes of moxa pyrolysis, identifying over 70 species and highlighting both potentially beneficial and harmful substances produced at different temperatures.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Minggao Xu, Baozhong Zhu, Long Zhao, Yunlan Sun, Yang Pan, Jiuzhong Yang
Summary: The pyrolysis of chlorobenzene at high temperatures produces benzene as the main product, along with various chlorinated aromatics as intermediates. Free radicals and o-benzyne play crucial roles in the decomposition pathways of chlorobenzene. Meanwhile, small-molecule products such as acetylene, 1,3,5-hexatriyne, and diacetylene are formed through the bond cleavage of o-benzyne.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Review
Quantum Science & Technology
Mirco Kutas, Bjoern Erik Haase, Felix Riexinger, Joshua Hennig, Patricia Bickert, Tobias Pfeiffer, Michael Bortz, Daniel Molter, Georg von Freymann
Summary: Optical nonlinear conversion processes are widely used in scientific and industrial applications. One important application is the generation of paired signal and idler photons. However, in the past, only one of the photons was utilized. New quantum measurement methods enable the usage of both photons and the transfer of information between different spectral ranges, which is particularly important in extreme frequency ranges.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Immunology
Benita C. Y. Tse, Angela L. Ferguson, Yen Chin Koay, Georges E. Grau, Anthony S. Don, Scott N. Byrne
Summary: The ability of UV radiation to suppress the immune system has both beneficial and detrimental effects. This study identified six lipids that are increased in UV-exposed mice and preferentially located in T cell areas. These lipids were found to play an immune regulatory role by inhibiting T cell proliferation. This research is important in understanding the mechanisms of UV-mediated immune suppression.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Chemistry, Analytical
Min Dang, Ruidong Liu, Fengshuo Dong, Bing Liu, Keyong Hou
Summary: On-line mass spectrometry (MS) techniques with high time resolution and elimination of potential artifacts are important for fast on-line analysis. Vacuum ultraviolet photoionization (VUV-PI) is a suitable ionization source for MS, offering advantages such as less fragments, high sensitivity, and short response time. This review discusses instrumental developments and characterization efforts on VUV-PI-MS, including modifications of the ionization source and sampling interfaces. Different ionization mechanisms and the influence of dopants are also explored, along with various applications.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Chao He, Ralf I. Kaiser, Wenchao Lu, Musahid Ahmed, Pavel S. Pivovarov, Oleg V. Kuznetsov, Marsel V. Zagidullin, Alexander M. Mebel
Summary: Researchers have discovered a unconventional mechanism of reaction in which benzyl and phenyl radicals react to produce a specific isomer of the simplest polycyclic aromatic hydrocarbon (PAH), called 9H-fluorene, in the gas phase. The structure of 9H-fluorene provides fundamental insights into the evolution of hydrocarbons in high temperature settings and its potential use as a molecular building block for complex curved nanostructures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Chaya Weeraratna, Xiaochen Tang, Oleg Kostko, Vi H. Rapp, Lara A. Gundel, Hugo Destaillats, Musahid Ahmed
Summary: A new generation of electronic cigarettes with acidifying additives exacerbates the youth vaping epidemic. The behavior of nicotine in vaping aerosols was studied using X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. It was found that nicotine in the core of aqueous particles is partially protonated and further protonated by acidification. However, the degree of nicotine protonation at the particle surface is significantly lower. The presence of propylene glycol and glycerol completely eliminates nicotine protonation at the surface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chao He, Ralf I. Kaiser, Wenchao Lu, Musahid Ahmed, Yahaira Reyes, Stanislaw F. Wnuk, Alexander M. Mebel
Summary: The gas-phase reaction between the 1-indenyl radical and the cyclopentadienyl radical was studied using synchrotron-based mass spectrometry coupled with a pyrolytic reactor. The isomer selective production of phenanthrene, anthracene, and benzofulvalene was identified through soft photoionization with tunable vacuum ultraviolet photons. Our findings challenge the classical theory regarding the combination of radicals and provide insight into the evolution of the cosmic carbon budget.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Ryan Reynolds, Musahid Ahmed, Kevin R. Wilson
Summary: Criegee intermediates (CIs) play a crucial role in the ozonolysis of unsaturated organic compounds, controlling the formation of small fragmentation products and higher molecular weight oligomeric compounds. The reaction of CI with carboxylic acids (RCOOH) to produce oligomeric alpha-acyloxyalkyl hydroperoxides (AAHPs) is of interest to the chemical transformation of organic compounds in the atmosphere. The rate of this reaction in condensed phases, however, is still uncertain.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Jason M. Gross, Seyedeh Reyhaneh Shavandi, Teodora Zagorac, Michael J. Pasterski, Luke Hanley
Summary: This study compares the effects of nanosecond laser ablation and femtosecond laser ablation on silicon. It is found that nanosecond laser ablation produces more visible nanostructures, while femtosecond laser ablation creates protruding nanostructures and conical craters.
JOURNAL OF LASER APPLICATIONS
(2023)
Article
Chemistry, Physical
Cameron J. J. Mackie, Wenchao Lu, Jiashu Liang, Oleg Kostko, Biswajit Bandyopadhyay, Ishan Gupta, Musahid Ahmed, Martin Head-Gordon
Summary: The stability and distributions of small water clusters generated in a supersonic beam expansion were studied using tunable vacuum ultraviolet (VUV) radiation generated at a synchrotron. Time-of-flight mass spectrometry revealed enhanced population of protonated water clusters (H+(H2O)( n )) based on ionization energy and photoionization distance from source, indicating the presence of magic numbers below n = 21 commonly reported in the literature. The VUV threshold photoionization of neutral water clusters near the nozzle exit resulted in a different nonequilibrium state compared to a skimmed molecular beam, leading to the discovery of a new magic number at 14.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Physical
Souvick Biswas, Dababrata Paul, Chao He, Nureshan Dias, Musahid Ahmed, Michelle L. Pantoya, Ralf I. Kaiser
Summary: Researchers have discovered an active heterogeneous surface chemistry between aluminum nanoparticles (AlNPs) and alumina in hydrocarbon jet fuels, which challenges previous understanding of alumina’s reactivity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Musahid Ahmed, Wenchao Lu
Summary: Understanding the origins of structure and bonding at the molecular level in complex chemical systems is crucial in physical chemistry. This study utilizes vibrational spectroscopy, X-ray techniques, microreactors, and aerosol beams to investigate intricate interactions such as hydrogen bonding, proton transfer, and noncovalent interactions. Various spectroscopy methods provide insights into the self-assembly and growth processes of different chemical systems. Future directions in studying hydrogen-bond networks in deep eutectic solvents and organic frameworks are also discussed.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Microbiology
Gabriel D. Parker, Luke Hanley, Xiao-Ying Yu
Summary: This article discusses the challenges and importance of sample preparation and various mass spectrometry imaging techniques in the investigation of plant-microbe interactions. It highlights the advantages of using mass spectral imaging to study these interactions at the molecular level, and emphasizes the need for proper sample preparation methods. The article also mentions recent advancements in microfluidic devices and machine learning, which hold promise for studying microorganisms using mass spectrometry imaging.
Article
Chemistry, Multidisciplinary
Chao He, Ralf I. Kaiser, Wenchao Lu, Musahid Ahmed, Vladislav S. Krasnoukhov, Pavel S. Pivovarov, Marsel V. Zagidullin, Valeriy N. Azyazov, Alexander N. Morozov, Alexander M. Mebel
Summary: Using a microchemical reactor and computational fluid dynamics (CFD) simulations, it is discovered that the reaction between benzyl and propargyl radicals synthesizes the simplest representative of PAHs, naphthalene. This reveals a novel Propargyl Addition-BenzAnnulation (PABA) mechanism and provides important insights into the origin of aromatic substances in the universe.
Article
Chemistry, Analytical
Teodora Zagorac, Hugo Andres Lopez Pena, Jason M. Gross, Katharine Moore Tibbetts, Luke Hanley
Summary: This study examines the use of ultraviolet picosecond laser desorption postionization (ps-LDPI-MS) for the detection of tricyclic antidepressants. The results show that 213nm ps-LDPI-MS has less fragmentation than other methods. The ionization energies of the compounds are predicted using density functional theory calculations.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Alon Zamir, Estefania Rossich Molina, Musahid Ahmed, Tamar Stein
Summary: This computational study investigates water cluster confinement within small finite polycyclic aromatic hydrocarbons (PAHs). The results serve as a model for understanding confinement in larger systems and provide insights into molecular interactions in confined systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Wenchao Lu, Emily Zhang, Jin Qian, Chaya Weeraratna, Megan N. Jackson, Chenhui Zhu, Jeffrey R. Long, Musahid Ahmed
Summary: This study investigated the crystallization and growth mechanism of the metal-organic framework Co-MOF-74 within microscopic volumes using wide-angle X-ray scattering and vibrational spectroscopy. The experiments revealed the molecular and structural details of the growth process, and the reduction in reagent volume in the microchip reactor accelerated the reaction rate. The synthesis of the metal-organic framework in microscopic volumes resulted in monodisperse and micron-sized crystals, which differed from those typically observed under bulk reaction conditions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Ralf I. Kaiser, Long Zhao, Wenchao Lu, Musahid Ahmed, Mikhail M. Evseev, Valeriy N. Azyazov, Alexander M. Mebel, Rana K. Mohamed, Felix R. Fischer, Xiaohu Li
Summary: This study provides compelling evidence for a barrierless, low-temperature pathway leading to racemates of [5] and [6]helicene, utilizing synchrotron based molecular beam photoionization mass spectrometry combined with electronic structure calculations. The results suggest a potential pathway for future astronomical observations and contribute to a fundamental understanding of the origins of homochirality on early Earth.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Estefania Rossich Molina, Bo Xu, Oleg Kostko, Musahid Ahmed, Tamar Stein
Summary: This study investigates the interactions between anthracene monomers and dimers with water cluster systems. The analysis shows that water tends to remain clustered around PAHs and is confined in specific cases, depending on the size and structure of the PAH.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(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)
