scholarly journals Timing Performance Simulation for 3D 4H-SiC Detector

Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 46
Author(s):  
Yuhang Tan ◽  
Tao Yang ◽  
Kai Liu ◽  
Congcong Wang ◽  
Xiyuan Zhang ◽  
...  
Keyword(s):  
Time Resolution ◽  
High Energy Physics ◽  
3D Structure ◽  
Three Dimensional ◽  
Threshold Energy ◽  
Atomic Displacement ◽  
High Energy ◽  
Simulation Software ◽  
Design And Optimization ◽  
Displacement Threshold

To meet the high radiation challenge for detectors in future high-energy physics, a novel 3D 4H-SiC detector was investigated. Three-dimensional 4H-SiC detectors could potentially operate in a harsh radiation and room-temperature environment because of its high thermal conductivity and high atomic displacement threshold energy. Its 3D structure, which decouples the thickness and the distance between electrodes, further improves the timing performance and the radiation hardness of the detector. We developed a simulation software—RASER (RAdiation SEmiconductoR)—to simulate the time resolution of planar and 3D 4H-SiC detectors with different parameters and structures, and the reliability of the software was verified by comparing the simulated and measured time-resolution results of the same detector. The rough time resolution of the 3D 4H-SiC detector was estimated, and the simulation parameters could be used as guideline to 3D 4H-SiC detector design and optimization.

Anisotropy of damage productions in electron irradiated molybdenum

1978 ◽  
Vol 36 (1) ◽  
pp. 354-355
Author(s):  
K. Izui ◽  
S. Furuno ◽  
H. Otsu ◽  
T. Nishida ◽  
H. Maeta
Keyword(s):  
Electron Flux ◽  
Threshold Energy ◽  
High Energy ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Displacement Threshold ◽  
The Mean ◽  
Channeling Effect ◽  
Different Origins ◽  
Threshold Energies

Anisotropy of damage productions in crystals due to high energy electron bombardment are caused from two different origins. One is an anisotropic displacement threshold energy, and the other is an anisotropic distribution of electron flux near the atomic rows in crystals due to the electron channeling effect. By the n-beam dynamical calculations for germanium and molybdenum we have shown that electron flux at the atomic positions are from ∽4 to ∽7 times larger than the mean incident flux for the principal zone axis directions of incident 1 MeV electron beams, and concluded that such a locally increased electron flux results in an enhanced damage production. The present paper reports the experimental evidence for the enhanced damage production due to the locally increased electron flux and also the results of measurements of the displacement threshold energies for the <100>,<110> and <111> directions in molybdenum crystals by using a high voltage electron microscope.

scholarly journals Impact of detector simulation in particle physics collider experiments - highlights

2019 ◽  
Vol 214 ◽  
pp. 02019
Author(s):  
V. Daniel Elvira
Keyword(s):  
Particle Physics ◽  
High Energy Physics ◽  
Hadron Collider ◽  
High Energy ◽  
Design And Optimization ◽  
The Cost ◽  
Detector Simulation ◽  
The Impact ◽  
Journal Submission ◽  
Energy Physics

Detector simulation has become fundamental to the success of modern high-energy physics (HEP) experiments. For example, the Geant4-based simulation applications developed by the ATLAS and CMS experiments played a major role for them to produce physics measurements of unprecedented quality and precision with faster turnaround, from data taking to journal submission, than any previous hadron collider experiment. The material presented here contains highlights of a recent review on the impact of detector simulation in particle physics collider experiments published in Ref. [1]. It includes examples of applications to detector design and optimization, software development and testing of computing infrastructure, and modeling of physics objects and their kinematics. The cost and economic impact of simulation in the CMS experiment is also presented. A discussion on future detector simulation needs, challenges and potential solutions to address them is included at the end.

scholarly journals Dendrite-Free Lithium Electrodeposition Enabled by 3D Porous Lithiophilic Host toward Stable Lithium Metal Anodes

2021 ◽  
Author(s):  
Linghong Xu ◽  
Zhihao Yu ◽  
Junrong Zheng
Keyword(s):  
Coulombic Efficiency ◽  
Short Circuit ◽  
3D Structure ◽  
Three Dimensional ◽  
Current Collector ◽  
High Energy ◽  
Lithium Metal ◽  
Lithium Storage ◽  
Practical Utilization ◽  
Lithium Dendrite

Abstract Lithium metal is a promising anode utilized in cutting-edge high-energy batteries owing to the low density, low electrochemical potential, and super high theoretical capacity. Unfortunately, continuous uncontrollable lithium dendrite growth and ‘dead’ lithium result in capacity decay, low coulombic efficiency, and short circuit, severely hindering the practical utilization of lithium anode. Herein, we propose a three-dimensional porous lithiophilic current collector for lithium storage. The conductive 3D structure constructed by carbon fiber (CF) can well accommodate the deposited lithium, eliminating volume change between the lithium depositing/stripping process. Moreover, the polydopamine (PDA) coating on the CF surface possesses a large number of polar groups, which can homogenize Li+ ions distribution and apply as the sites for lithium deposition, decreasing nucleation overpotential. As a result, under the 1 mA cm−2 current density, the PDA coated CF (PDA@CF) electrode exhibits high CE (∼98%) for 1000 cycles. Galvanostatic measurements demonstrate that the Li anode using PDA@CF achieves 1000 h cycling life under 1 mA cm−2 with a low overpotential (&lt;15 mV). The LiFePO4 full cell shows enhanced rate performance and stable long-term cycling.

Computer Simulation of Displacement Damage in Silicon Carbide

2004 ◽  
Vol 851 ◽  
Author(s):  
R. Devanathan ◽  
F. Gao ◽  
W. J. Weber
Keyword(s):  
Silicon Carbide ◽  
Radiation Effects ◽  
Threshold Energy ◽  
High Energy ◽  
Dynamics Simulation ◽  
Displacement Damage ◽  
Energy Cascades ◽  
Displacement Threshold ◽  
Atom Energy ◽  
Shed Light

ABSTRACTWe have performed molecular dynamics simulation of displacement events on silicon and carbon sublattices in silicon carbide for displacement doses ranging from 0.005 to 0.5 displacements per atom. Our results indicate that the displacement threshold energy is about 21 eV for C and 35 eV for Si, and amorphization can occur by accumulation of displacement damage regardless of whether Si or C is displaced. In addition, we have simulated defect production in high-energy cascades as a function of the primary knock-on atom energy and observed features that are different from the case of damage accumulation in Si. These systematic studies shed light on the phenomenon of non-ionizing energy loss that is relevant to understanding space radiation effects in semiconductor devices.

scholarly journals Monte Carlo Threshold Energy Estimation for A + B → C + D processes: An Educational Resource in Experimental High Energy Physics Research

2016 ◽  
Vol 39 (1) ◽  
Author(s):  
Manuel Alejandro Segura ◽  
Julian Salamanca ◽  
Edwin Munevar
Keyword(s):  
Monte Carlo ◽  
Learning Curve ◽  
High Energy Physics ◽  
Threshold Energy ◽  
High Energy ◽  
Educational Resource ◽  
Final State ◽  
Energy Estimation ◽  
Pedagogical Environment ◽  
Energy Physics

Specialized documentation envisioned from a pedagogical bases to train scientifically and technologically teachers and researchers, who initiate themselves in the analysis of high energy physics (HEP) experiments, is scarce. The lack of this material makes that young scientists' learning process be prolonged in time, raising costs in experimental research. In this paper we present the Monte Carlo technique applied to simulate the threshold energy for producing final-state particles of a specific two-body process (A + B → C + D), as pedagogical environment to face both computationally and conceptually an experimental analysis. The active/interactive learning-teaching formative process presented here is expected to be an educational resource for reducing young scientists' learning curve and saving time and costs in HEP scientific research.

GRAPHICAL CONCEPTS FOR THE REPRESENTATION OF EVENTS IN HIGH ENERGY PHYSICS

1990 ◽  
Vol 01 (01) ◽  
pp. 147-163 ◽  
Author(s):  
H. DREVERMANN ◽  
C. GRAB
Keyword(s):  
Magnetic Field ◽  
High Energy Physics ◽  
Three Dimensional ◽  
Charged Particles ◽  
Homogeneous Magnetic Field ◽  
High Energy ◽  
Track Geometry ◽  
Aleph Detector ◽  
Complicated Event ◽  
Energy Physics

Different methods to graphically represent points and tracks of events, measured with the ALEPH-detector at LEP, are discussed. Special emphasis is put on projections, that are adapted to the cylindrical geometry of the detector, to the track geometry of charged particles moving in a homogeneous magnetic field and to the event topologies, encountered in Z0 physics. A new concept, the so-called "V-plot", is introduced, which incorporates the full three-dimensional information of spatial points in a single picture. It is ideally suited for the study of more complicated event topologies, such as e.g. decays of particles within jets, and of the correlation between tracks and calorimeter clusters. In addition, we propose ways of combining histograms and projections to incorporate the tracking and calorimetric information into a single picture. We describe methods of employing colour schemes to facilitate recognition of correlations between hits, tracks and/or subdetectors in different representations.

scholarly journals Transverse Spin Azimuthal Asymmetries in SIDIS at COMPASS: Multidimensional Analysis

2016 ◽  
Vol 40 ◽  
pp. 1660029 ◽  
Author(s):  
Bakur Parsamyan
Keyword(s):  
High Energy Physics ◽  
Three Dimensional ◽  
High Energy ◽  
Muon Beam ◽  
Distribution Functions ◽  
Multidimensional Analysis ◽  
Transverse Spin ◽  
Hadron Structure ◽  
Transverse Momentum Dependent ◽  
Azimuthal Asymmetries

COMPASS is a high-energy physics experiment operating at the SPS at CERN. Wide physics program of the experiment comprises study of hadron structure and spectroscopy with high energy muon and hadrons beams. As for the muon-program, one of the important objectives of the COMPASS experiment is the exploration of the transverse spin structure of the nucleon via spin (in)dependent azimuthal asymmetries in single-hadron production in deep inelastic scattering of polarized leptons off transversely polarized target. For this purpose a series of measurements were made in COMPASS, using 160 GeV/c longitudinally polarized muon beam and transversely polarized [Formula: see text] (in 2002, 2003 and 2004) and [Formula: see text] (in 2007 and 2010) targets. The experimental results obtained by COMPASS for unpolarized target azimuthal asymmetries, Sivers and Collins effects and other azimuthal observables play an important role in the general understanding of the three-dimensional nature of the nucleon. Giving access to the entire twsit-2 set of transverse momentum dependent parton distribution functions and fragmentation functions COMPASS data triggers constant theoretical interest and is being widely used in phenomenological analyses and global data fits. In this review main focus is given to the very recent results obtained by the COMPASS collaboration from first ever multi-dimensional extraction of transverse spin asymmetries.

scholarly journals A New Technology for Fast Two-Dimensional Detection of Proton Therapy Beams

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Robert Hollebeek ◽  
Mitch Newcomer ◽  
Godwin Mayers ◽  
Brian Delgado ◽  
Gaurav Shukla ◽  
...  
Keyword(s):  
Dose Rate ◽  
Spatial Resolution ◽  
Proton Therapy ◽  
Time Resolution ◽  
High Energy Physics ◽  
High Energy ◽  
High Dose Rate ◽  
High Dose ◽  
High Time Resolution ◽  
High Count

The Micromesh Gaseous Structure, or Micromegas, is a technology developed for high count-rate applications in high-energy physics experiments. Tests using a Micromegas chamber and specially designed amplifiers and readout electronics adapted to the requirements of the proton therapy environment and providing both excellent time and high spatial resolution are presented here. The device was irradiated at the Roberts Proton Therapy Center at the University of Pennsylvania. The system was operated with ionization gains between 10 and 200 and in low and intermediate dose-rate beams, and the digitized signal is found to be reproducible to 0.8%. Spatial resolution is determined to be 1.1 mm (1σ) with a 1 ms time resolution. We resolve the range modulator wheel rotational frequency and the thicknesses of its segments and show that this information can be quickly measured owing to the high time resolution of the system. Systems of this type will be extremely useful in future treatment methods involving beams that change rapidly in time and spatial position. The Micromegas design resolves the high dose rate within a proton Bragg peak, and measurements agree with Geant4 simulations to within 5%.

Graphical Concepts for the Representation of Events in High Energy Physics

1991 ◽  
Vol 02 (01) ◽  
pp. 328-330
Author(s):  
H. DREVERMANN ◽  
C. GRAB ◽  
B.S. NILSSON ◽  
R.K. VOGL
Keyword(s):  
Magnetic Field ◽  
High Energy Physics ◽  
Three Dimensional ◽  
Charged Particles ◽  
Homogeneous Magnetic Field ◽  
High Energy ◽  
Track Geometry ◽  
Aleph Detector ◽  
Complicated Event ◽  
Energy Physics

Different methods to graphically represent points and tracks of events, measured with the ALEPH-detector at LEP, are discussed. Special emphasis is put on projections, that are adapted to the cylindrical geometry of the detector, to the track geometry of charged particles moving in a homogeneous magnetic field and to the specific event topologies, encountered in Z0 physics. A new concept, the so-called “V-plot”, is introduced, which incorporates the full three dimensional information of spatial points in a single picture. It is ideally suited for the study of more complicated event topologies, such as e.g. decays of particles within jets, and of the correlation between information from tracking and calorimetric devices. In addition, we propose ways of combining histograms and projections in a single picture. We describe methods of employing colour schemes to facilitate recognition of correlations between hits, tracks and/or subdetectors in different representations.

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