A5066612431- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- High voltage insulation and dielectric phenomena
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Power Transformer Diagnostics and Insulation
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Electrostatic Discharge in Electronics
- Neutrino Physics Research
- Ion-surface interactions and analysis
- Quantum Chromodynamics and Particle Interactions
- Material Properties and Processing
- Plant Surface Properties and Treatments
- Sensor Technology and Measurement Systems
- Atomic and Subatomic Physics Research
- Water Systems and Optimization
- Embedded Systems and FPGA Design
- Engineering Applied Research
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Muon and positron interactions and applications
University of Electro-Communications
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2015-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2006-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2022
European Organization for Nuclear Research
2018-2021
University of Catania
2007-2018
Istituto Nazionale di Fisica Nucleare
2012-2018
Clarus Therapeutics (United States)
2015
Ishikawa Prefectural University
2013
Austrian Academy of Sciences
2012
Understanding radial and azimuthal variation, tree-to-tree in sap flux density (Fd) as sources of uncertainty is important for estimating transpiration using flow techniques. In a Japanese cedar (Cryptomeria japonica D. Don.) forest, Fd was measured at several depths aspects 18 trees, heat dissipation (Granier-type) sensors. We observed considerable variation Fd. The coefficient (CV) calculated from depth 0-20 mm (Fd1) 20-40 (Fd2) ranged 6.7 to 37.6% (mean = 28.3%) 19.6 62.5% 34.6%) the...
Accelerated life tests of polymer insulation is used to get rapid distribution data. Low-density polyethylene (DED 2005) as the specimen was heated for 15 min at 130°C. A needle electrode then inserted into specimen. The tip ground an angle 30° and a radius curvature 5 μ. arrangement electrodes in specimens shown Fig. 1. test frequencies were 50, 300, 1000, 3000, 10,000 Hz.
The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Electroweak Reaction) experiment at 12 GeV upgraded Jefferson Lab are presented. A highlight Fundamental Symmetries subfield 2007 NSAC Long Range Plan was SLAC E158 measurement parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M{\o}ller) scattering. proposed will improve on this result by factor five, yielding most precise weak mixing angle low or high energy anticipated over next decade....
This paper describes the influence of electrolyte on tracking breakdown organic insulating materials by IEC (International Electrotechnical Commission) 112 Method. Two different kinds with surface active and non-surface agents have been employed to study wetting breakdown. The effect various contact angles is shown. Increasing applied voltage changes location dry band formed sample's so that droplet number does not always decrease increasing voltage. For samples lower angle, violet corona...
MeV-GeV dark matter (DM) is theoretically well motivated but remarkably unexplored. This Letter of Intent presents the DM discovery potential for a 1 m$^3$ segmented plastic scintillator detector placed downstream beam-dump at one high intensity JLab experimental Halls, receiving up to 10$^{22}$ electrons-on-target (EOT) in one-year period. experiment (Beam-Dump eXperiment or BDX) sensitive DM-nucleon elastic scattering level thousand counts per year, with very low threshold recoil energies...
This paper describes measured spectra of light emitted from discharges generated on the surface organic insulations. The corona discharge before carbon deposit showed many ultraviolet lines below 400 nm. These are produced by energy transition molecular nitrogen in air. After deposit, scintillation initiates. It contains visible above do not correspond with those dominant gases Therefore, structure materials may influence line for discharge. approaches toward sample's surface. arc and/or...
A new collaboration is being formed to develop a multi-kiloton Long-Baseline neutrino experiment that will be located at the Surf Underground Research Facility (SURF) in Lead, SD. In present design, detector inside cryostats filled with 68,400 ton of ultrapure liquid argon (less than 100 parts per trillion oxygen equivalent contamination). To qualify membrane technology for future very large-scale and underground implementations, strong prototyping effort ongoing: several smaller detectors...
A new large-area, lightweight tracker based on the GEM technology is under development for upcoming experiments in Hall at Jefferson Lab, where a longitudinally polarized electron beam of 11 GeV will be available late 2013. This beam, combined with innovative targets, provide luminosity up to 1039/(s⋅cm2) opening exciting opportunities investigate unexplored aspects inner structure nucleon and dynamics its constituents. The design presented this paper.
In this paper, various experimental results are described of bow-tie trees obtained in steam-cured crosslinked polyethylene which contains 103 to 105voids/mm3. The growth depends upon the applied voltage and frequency. Void size has a great influence on trees.
Crosslinked polyethylene is being used as an insulation of electric power cables because its excellent quality. But in spite the fact that and corsslinked have established service record, it was reported some crosslinked had failed over several years. <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1,2</sup> This might be quality or deteriorated by trees initiated grown at asymmetrical conductor a void under high field. In fact, careful...
Visual and thermal image data are used to detect the progress of tracking deterioration on surface organic insulating materials. The visual images provide quantitative real-time information regarding propagation process carbon path. It was confirmed that type test sample determines voltage dependence path area, flow leakage current in path, location high temperature regions. Furthermore, distribution density can be determined by method.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This paper describes the result of light-pulse measurement with light sensors for detecting tracking deterioration on surface organic insulating materials by means IEC 587 test method. Three kinds were used detection discharges generated insulator surface. Each can respond to ultraviolet (Su), visible (Sv) and infrared (Sr), respectively. An Su sensor continuously counted pulses from start until it came final breakdown, in which case an almost constant rising rate total number TN was...
The dielectric breakdown characteristics of polyethersulfone (PES) film was investigated in a temperature range from 25 to 250°C, under dc voltage conditions. dependence strength shows two distinct regions, referred as I (25-150°C) and II (150-250°C). In region I, the appears be electronic, is almost independent electric field rise time over times ranging microseconds seconds. II, impulse thermal due ionic conduction likely mechanism. calculated jumping distance 2λ <sub...
The gas electron multiplier technology has been proven to tolerate rat e larger than 50 MHz/cm2 without noticeable aging and provide sub resolution on working chambers up 45 cm x cm. A new multiplier-based tracker is under development for the Hall upgrade at Jefferson Lab. of have designed in a modular way: each chamber consists 3 adjacent modules, with an active area 40 each. We optimized flow inside module volume, using COMSOL physics simulator framework; COMSOL-based analysis includes...
A new hybrid silicon μstrip and large area GEM (Gas Electron Multiplier) tracker is under development for the upcoming high luminosity (up to 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">39</sup> /s/cm xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) experiments at Hall-A of JLab 12 GeV electron beam facility. The system consists 2 small 10×20 cm planes placed near scattering chamber 18 40×50 modules that form larger chambers with...
Abstract The measurement of the response function CsI(Tl) scintillators FARCOS array, to standard sources, cosmic rays and environmental background allows assessment their performance. Fast–Slow analysis discriminates between $$\gamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>γ</mml:mi> </mml:math> -rays charged particles. relatively good energy resolution observation well resolved escape peaks due interaction 4.44 MeV -ray generated by AmBe source. Furthermore,...
The dielectric breakdown characteristics of polyparabanic acid (PPA) film were investigated in a temperature range from 20 to 300°C, under square pulse conditions. dependence the strength shows two distinct regions, referr-ed as I (20-150°C) and II (150-300°C). In region I, appears be due an electron avalanche mechanism. II, impulse thermal Poole-Frenkel effect electrons likely