Готові списки джерел за темами / Acceleraton of particles

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Добірка наукової літератури з теми "Acceleraton of particles"

Автор: Grafiati

Опубліковано: 10 березня 2023

Оновлено: 31 липня 2025

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Статті в журналах з теми "Acceleraton of particles"

Nishida, Yasushi. "Electron linear accelerator based on cross field acceleration principle." Laser and Particle Beams 7, no. 3 (1989): 561–79. http://dx.doi.org/10.1017/s0263034600007540.

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Powerful lasers have the potential to be used for power sources of the high energy particle accelerators. However, we have to convert the transverse wave into a longitudinal one which can trap the charged particles in the wave trough to accelerate them. In order to obtain a high field-gradient in an accelerator, several new concepts have been proposed. One of them is a beat wave accelerator (BWA) which uses a nonlinear optical mixing of two laser beams. Another concept is a Cross Field Acceleration (or a Vp × B acceleration) scheme, in which the trapped particles in the wave trough are acceler

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Comisso, Luca, Glennys R. Farrar, and Marco S. Muzio. "Ultra-High-Energy Cosmic Rays Accelerated by Magnetically Dominated Turbulence." Astrophysical Journal Letters 977, no. 1 (2024): L18. https://doi.org/10.3847/2041-8213/ad955f.

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Abstract Ultra-high-energy cosmic rays (UHECRs), particles characterized by energies exceeding 1018 eV, are generally believed to be accelerated electromagnetically in high-energy astrophysical sources. One promising mechanism of UHECR acceleration is magnetized turbulence. We demonstrate from first principles, using fully kinetic particle-in-cell simulations, that magnetically dominated turbulence accelerates particles on a short timescale, producing a power-law energy distribution with a rigidity-dependent, sharply defined cutoff well approximated by the form f cut E , E cut = sech ( E / E c

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Guidoni, S. E., J. T. Karpen, and C. R. DeVore. "Spectral Power-law Formation by Sequential Particle Acceleration in Multiple Flare Magnetic Islands." Astrophysical Journal 925, no. 2 (2022): 191. http://dx.doi.org/10.3847/1538-4357/ac39a5.

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Abstract We present a first-principles model of pitch-angle and energy distribution function evolution as particles are sequentially accelerated by multiple flare magnetic islands. Data from magnetohydrodynamic (MHD) simulations of an eruptive flare/coronal mass ejection provide ambient conditions for the evolving particle distributions. Magnetic islands, which are created by sporadic reconnection at the self-consistently formed flare current sheet, contract and accelerate the particles. The particle distributions are evolved using rules derived in our previous work. In this investigation, we

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Barač, Rocco, and Toni Šćulac. "Development of a simple algorithm for linear accelerator construction and simulation." St open 4 (August 31, 2023): 1–15. http://dx.doi.org/10.48188/so.4.13.

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Aim: To develop a simple algorithm that accurately constructs and simulates an Alvarez-type linear accelerator given the initial conditions and number of accelerator parts.Methods: We wrote the algorithm in Python, a programming language with numerous useful math and science libraries, and the ability to use classes and objects. The particles were accelerated in electric fields (which we assumed to be constant within each cavity at any given moment) to allow for a comparison of numerical results with an analytic expression. No magnetic fields were present in the simulations used in this articl

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Hogan, Mark J. "Electron and Positron Beam–Driven Plasma Acceleration." Reviews of Accelerator Science and Technology 09 (January 2016): 63–83. http://dx.doi.org/10.1142/s1793626816300036.

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Particle accelerators are the ultimate microscopes. They produce high energy beams of particles — or, in some cases, generate X-ray laser pulses — to probe the fundamental particles and forces that make up the universe and to explore the building blocks of life. But it takes huge accelerators, like the Large Hadron Collider or the two-mile-long SLAC linac, to generate beams with enough energy and resolving power. If we could achieve the same thing with accelerators just a few meters long, accelerators and particle colliders could be much smaller and cheaper. Since the first theoretical work in

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Lemery, F., K. Floettmann, R. Assmann, P. Piot, and F. X. Kaerntner. "An Adiabatic Phase-Matching Accelerator." Physical Review Accelrators and Beams 21, no. 5 (2017): 051302. https://doi.org/10.3204/PUBDB-2018-02172.

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We present a general concept to accelerate non-relativistic charged particles. Our concept employs an adiabatically-tapered dielectric-lined waveguide which supports accelerating phase velocities for synchronous acceleration. We propose an ansatz for the transient field equations, show it satis- fies Maxwell’s equations under an adiabatic approximation and find excellent agreement with a finite-difference time-domain computer simulation. The fields were implemented into the particle- tracking program astra and we present beam dynamics results for an accelerating field with a 1-mm-wavelen

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Ogata, Atsushi, and Kazuhisa Nakajima. "Recent progress and perspectives of laser–plasma accelerators." Laser and Particle Beams 16, no. 2 (1998): 381–96. http://dx.doi.org/10.1017/s0263034600011654.

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Recent progress in laser-plasma accelerators has matured a concept of particle acceleration as a possible next-generation particle accelerator promising ultrahigh accelerating gradients in a compact size. Four major concepts of laser-plasma accelerators—the plasma beat wave accelerator, the laser wakefield accelerator, the self-modulated laser wakefield accelerator, and the plasma wakefield accelerator—are reviewed on accelerator physics issues and experiments demonstrating the basic mechanisms of their concepts. As a perspective to the future practical application, a design of 5-TeV linear co

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Kalmykov, S., O. Polomarov, D. Korobkin, J. Otwinowski, J. Power, and G. Shvets. "Novel techniques of laser acceleration: from structures to plasmas." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, no. 1840 (2006): 725–40. http://dx.doi.org/10.1098/rsta.2005.1734.

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Compact accelerators of the future will require enormous accelerating gradients that can only be generated using high power laser beams. Two novel techniques of laser particle acceleration are discussed. The first scheme is based on a solid-state accelerating structure powered by a short pulse CO 2 laser. The planar structure consists of two SiC films, separated by a vacuum gap, grown on Si wafers. Particle acceleration takes place inside the gap by a surface electromagnetic wave excited at the vacuum/SiC interface. Laser coupling is accomplished through the properly designed Si grating. This

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Fang, Jun, Qi Xia, Shiting Tian, Liancheng Zhou, and Huan Yu. "Kinetic simulation of electron, proton and helium acceleration in a non-relativistic quasi-parallel shock." Monthly Notices of the Royal Astronomical Society 512, no. 4 (2022): 5418–22. http://dx.doi.org/10.1093/mnras/stac886.

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ABSTRACT In addition to accelerating electrons and protons, non-relativistic quasi-parallel shocks are expected to possess the ability to accelerate heavy ions. The shocks in supernova remnants are generally supposed to be accelerators of Galactic cosmic rays, which consist of many species of particles. We investigate the diffusive shock acceleration of electrons, protons and helium ions in a non-relativistic quasi-parallel shock through a 1D particle-in-cell simulation with a helium-to-proton number density ratio of 0.1, which is relevant for Galactic cosmic rays. The simulation indicates tha

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Shikha Pandey, Ananya Singh, and Arshad Kamal. "Nanophotonic electron accelerator: A review of particle accelerator technology." International Journal of Science and Research Archive 14, no. 1 (2025): 1905–10. https://doi.org/10.30574/ijsra.2025.14.1.0209.

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Particle accelerators are indispensable tools in various industries, spanning a wide range of research fields such as nuclear and particle physics. They are particularly valuable in the medical sector for applications like medical imaging, radiotherapy and tumor treatment. Currently, the largest and most powerful particle accelerator is the Large Hadron Collider (LHC) at CERN, a 27-kilometer-long ring-shaped tunnel that accelerates particles, such as protons, to near-light speeds and collides them. While the LHC represents the pinnacle of accelerator technology, there is significant interest i

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Дисертації з теми "Acceleraton of particles"

Waldman, Zachary J. "Majorana Neutrinos in the Jacob-Wick phase convention." Diss., Online access via UMI:, 2008.

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Goutierre, Emmanuel. "Machine learning-based particle accelerator modeling." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASG106.

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Les accélérateurs de particules reposent sur des simulations de haute précision pour optimiser la dynamique du faisceau. Ces simulations sont coûteuses en ressources de calcul, rendant leur analyse en temps réel difficilement réalisable. Cette thèse propose de surmonter cette limitation en explorant le potentiel de l'apprentissage automatique pour développer des modèles de substitution des simulations d'accélérateurs de particules. Ce travail se concentre sur ThomX, une source Compton compacte, et introduit deux modèles de substitution : LinacNet et Implicit Neural ODE (INODE). Ces modèles son

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Verhagen, Erik. "Development of the new trigger and data acquisition system for the CMS forward muon spectrometer upgrade." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209110.

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Анотація:

La physique des particules élémentaires, aussi appelé physique des hautes énergies, est l'étude de l'infiniment petit, popularisée récemment par la découverte de nouvelles particules fondamentales permettant de consolider notre connaissance de la matière. Pour réaliser des mesures à une échelle aussi réduite, une méthode consiste à augmenter l’énergie des constituants de la matière, à l'aide d'accélérateur de particules, puis de les briser pour révéler leur constitution. Au-delà de l'intérêt en termes de physique expérimentale, réaliser des expériences de ce type est devenu une prouesse techno

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Johnson, Samantha. "Optimizing the ion source for polarized protons." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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Beams of polarized protons play an important part in the study of the spin dependence of the nuclear force by measuring the analyzing power in nuclear reactions. The source at iThemba LABS produces a beam of polarized protons that is pre-accelerated by an injector cyclotron (SPC2) to a energy of 8 MeV before acceleration by the main separated-sector cyclotron to 200 MeV for physics research. The polarized ion source is one of the two external ion sources of SPC2. Inside the ion source hydrogen molecules are dissociated into atoms in the dissociator and cooled to a temperature of approximately

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Weathersby, Stephen. "Damping higher order modes in the PEP-II B-factory storage ring collider." Diss., Connect to online resource - MSU authorized users, 2007.

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Thesis (Ph.D.)--Michigan State University. Dept. of Physics and Astronomy, 2007.<br>Title from PDF t.p. (viewed on August 18, 2009) Includes bibliographic references (p. 175-179). Also issued in print.

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Williams, Logan Todd. "Ion acceleration mechanisms of helicon thrusters." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47691.

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A helicon plasma source is a device that can efficiently ionize a gas to create high density, low temperature plasma. There is growing interest in utilizing a helicon plasma source in propulsive applications, but it is not yet known if the helicon plasma source is able to function as both an ion source and ion accelerator, or whether an additional ion acceleration stage is required. In order to evaluate the capability of the helicon source to accelerate ions, the acceleration and ionization processes must be decoupled and examined individually. To accomplish this, a case study of two helico

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Linz, Thomas M. "Self-Force on Accelerated Particles." Thesis, The University of Wisconsin - Milwaukee, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3712619.

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<p> The likelihood that gravitational waves from stellar-size black holes spiraling into a supermassive black hole would be detectable by a space based gravitational wave observatory has spurred the interest in studying the extreme mass-ratio inspiral (EMRI) problem and black hole perturbation theory (BHP). In this approach, the smaller black hole is treated as a point particle and its trajectory deviates from a geodesic due to the interaction with its own field. This interaction is known as the gravitational self-force, and it includes both a damping force, commonly known as radiation reactio

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Alton, Andrew K. "Evidence for the existence of jets in photon-parton interaction events at center of mass energies from 18 to 28 GEV." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/1014850.

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Experiment E683 at Fermi National Accelerator Laboratory (FNAL) in Batavia, Illinois, uses a modular, high-energy sampling calorimeter as the basis of the detector system. This detector provides information on the energy and position of particles that exit a collision of a photon or pion with a target proton. While exiting particles are thought to form what are described as "jets", and several E683 projects involve working with these jets, it has not yet been demonstrated that jets indeed have been detected.The solution proposed here involves demonstrating that E683 data has a statistically si

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Hosack, Michael G. "Optimization of particle tracking for experiment E683 at Fermi National Laboratory." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941370.

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The subject of this thesis is the improvement of particle tracking through the identification and correction of small systematic errors in particle "hit" locations due to positioning of tracking detectors. These errors call be as large or larger than the statistical spatial resolution of tracking detectors themselves, and therefore must be corrected. The focus is on identification and correction of errors due to rotations and beam axis translations.An algorithm is developed for use with proportional wire chamber and drift chamber detectors in experiment E683 at the Wideband facility of Fermi N

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Rosencranz, Daniela Necsoiu. "Monte Carlo simulation and experimental studies of the production of neutron-rich medical isotopes using a particle accelerator." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3077/.

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The developments of nuclear medicine lead to an increasing demand for the production of radioisotopes with suitable nuclear and chemical properties. Furthermore, from the literature it is evident that the production of radioisotopes using charged-particle accelerators instead of nuclear reactors is gaining increasing popularity. The main advantages of producing medical isotopes with accelerators are carrier free radionuclides of short lived isotopes, improved handling, reduction of the radioactive waste, and lower cost of isotope fabrication. Proton-rich isotopes are the result of nuclear inte

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Книги з теми "Acceleraton of particles"

CERN Accelerator School Superconductivity in Particle Accelerators (1995 Haus Rissen, Hamburg, Germany). CAS, CERN Accelerator School Superconductivity in Particle Accelerators: Haus Rissen, Hamburg, Germany, 17-24 May 1995 : proceedings. Edited by Turner S. 1935- and European Organization for Nuclear Research. CERN, European Organization for Nuclear Research, 1996.

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Melvin, Month, Dienes Margaret, and U.S. Particle Accelerator School (4th : 1984 : Fermi National Accelerator Laboratory), eds. Physics of particle accelerators. American Institute of Physics, 1987.

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Klapdor-Kleingrothaus, H. V. Non-accelerator particle physics. Institute of Physics Pub., 1998.

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Edwards, D. A. An introduction to the physics of high energy accelerators. Wiley, 1993.

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Lee, S. Y. Accelerator physics. 3rd ed. World Scientific, 2012.

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Blondel, Alain. ECFA/CERN studies of a European neutrino factory complex. CERN, 2004.

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1942-, Klapdor-Kleingrothaus H. V., ed. Beyond the desert 2002: Accelerator, non-accelerator and space approaches in the new millennium : proceedings of the Third International Conference on Particle Physics Beyond the Standard Model:Accelerator, Non-Accelerator and Space Approaches, Oulu, Finland, 2-7 June 2002. Institute of Physics, 2003.

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Wiedemann, Helmut. Particle Accelerator Physics. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-02903-9.

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Wiedemann, Helmut. Particle Accelerator Physics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18317-6.

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Wiedemann, Helmut. Particle Accelerator Physics. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05034-7.

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Частини книг з теми "Acceleraton of particles"

Otto, Thomas. "Risks and Hazards of Particle Accelerator Technologies." In Safety for Particle Accelerators. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57031-6_2.

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AbstractIn this section, the motivation and operation of particle accelerators are briefly introduced. Then, safety aspects of the key building blocks are treated. Magnets provide the steering forces for accelerated particles. Cryogenics provides the low temperatures required for the operation of superconducting magnets; radiofrequency technologies impart energy to accelerated particles. A byproduct of their operation is Non-ionising radiation. Another type of NIR is represented by lasers which find increasing use in accelerator applications. Finally, collimators shape the particle beams and p

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Seeman, J., D. Schulte, J. P. Delahaye, et al. "Design and Principles of Linear Accelerators and Colliders." In Particle Physics Reference Library. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34245-6_7.

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AbstractLinear accelerators (linacs) use alternating radiofrequency (RF) electromagnetic fields to accelerate charged particles in a straight line. Linacs were invented about 95 years ago and have seen many significant technical innovations since. A wide range of particle beams have been accelerated with linacs including beams of electrons, positrons, protons, antiprotons, and heavy ions. Linac parameter possibilities include pulsed versus continuous wave, low and high beam powers, low and high repetition rates, low transverse emittance beams, short bunches with small energy spreads, and accel

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Minty, Michiko G., and Frank Zimmermann. "Introduction." In Particle Acceleration and Detection. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_1.

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AbstractParticle accelerators were originally developed for research in nuclear and high-energy physics for probing the structure of matter. Over the years advances in technology have allowed higher and higher particle energies to be attained thus providing an ever more microscopic probe for understanding elementary particles and their interactions. To achieve maximum benefit from such accelerators, measuring and controlling the parameters of the accelerated particles is essential. This is the subject of this book.

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Méot, François. "Microtron." In Particle Acceleration and Detection. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-59979-8_6.

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AbstractThis chapter introduces the microtron, and to the theoretical material needed for the simulation exercises. It begins with a brief reminder of the historical context, and continues with the beam optics and acceleration techniques that the microtron method leans on, relying in that on basic charged particle optics and acceleration concepts introduced in the previous chapters. It further addresses the following aspects: spiraling accelerated orbits tangenting at the accelerating gap, beam recirculation through an accelerating system, via return arcs, methods for periodic motion stability

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Minty, Michiko G., and Frank Zimmermann. "Collimation." In Particle Acceleration and Detection. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_6.

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AbstractParticles at large betatron amplitudes or with a large momentum error constitute what is generally referred to as a beam halo. Such particles are undesirable since they produce a background in the particle-physics detector. The background arises either when the halo particles are lost at aperture restrictions in the vicinity of the detector, producing electro-magentic shower or muons, or when they emit synchrotron radiation that is not shielded and may hit sensitive detector components. In superconducting hadron storage rings, a further concern is localized particle loss near one of th

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Roser, Thomas. "Past, Present, and Future of Polarized Hadron Beams." In Polarized Beam Dynamics and Instrumentation in Particle Accelerators. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-16715-7_1.

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AbstractThe acceleration and storage of high energy polarized proton beams has made tremendous progress over the last 40 years challenging along the way the technologies, precision and the understanding of the beam dynamics of accelerators. This progress is most evident in that one can now contemplate high energy colliders with polarized beams and high luminosity at the same time. After a brief summary of the development and history of polarized proton beam acceleration this chapter will focus on the acceleration of polarized proton beams from MeV to the 100s of GeVs and the possibility of acc

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Reames, Donald V. "Gradual SEP Events." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_5.

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AbstractGradual solar energetic-particle (SEP) events are “big proton events” and are usually much more “gradual” in their decay than in their onset. As their intensities increase, particles streaming away from the shock amplify Alfvén waves that scatter subsequent particles, increasing their acceleration, eventually limiting ion flow at the “streaming limit.” Waves generated by higher-speed protons running ahead can also throttle the flow of lower-energy ions, flattening spectra and altering abundances in the biggest SEP events. Thus, we find that the A/Q-dependence of scattering causes eleme

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Otto, Thomas. "Industrial Safety at Particle Accelerators." In Safety for Particle Accelerators. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57031-6_4.

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AbstractThe construction and operation of particle accelerators implies the use of numerous technologies and trades which are well-known from the manufacturing and construction industries. Consequently, their safety hazards are described in the literature and standard best practice solutions exist for controlling the risks emerging from these activities. In this section, the occupational hazards of electricity, mechanical equipment and pressure vessels are illustrated with examples from particle accelerator facilities. Further sections are dedicated to accelerator-specific protection against f

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Reames, Donald V. "Distinguishing the Sources." In Solar Energetic Particles. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_3.

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AbstractOur discussion of history has covered many of the observations that have led to the ideas of acceleration by shock waves or by magnetic reconnection in gradual and impulsive solar energetic particle (SEP) events, respectively. We now present other compelling observations, including onset timing, SEP-shock correlations, injection time profiles, high-energy spectral knees, e/p ratios, and intensity dropouts caused by a compact source, that have helped clarify these acceleration mechanisms and sources. However, some of the newest evidence now comes from source-plasma temperatures. In this

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Brugger, M., H. Burkhardt, B. Goddard, F. Cerutti, and R. G. Alia. "Interactions of Beams with Surroundings." In Particle Physics Reference Library. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34245-6_5.

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AbstractWith the exceptions of Synchrotron Radiation sources, beams of accelerated particles are generally designed to interact either with one another (in the case of colliders) or with a specific target (for the operation of Fixed Target experiments, the production of secondary beams and for medical applications). However, in addition to the desired interactions there are unwanted interactions of the high energy particles which can produce undesirable side effects. These interactions can arise from the unavoidable presence of residual gas in the accelerator vacuum chamber, or from the impact

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Тези доповідей конференцій з теми "Acceleraton of particles"

Sethi, V. K., I. G. Wright, and R. B. Dooley. "Bed Material Factors Affecting Accelerated in-Bed Wastage in FBCS." In CORROSION 1994. NACE International, 1994. https://doi.org/10.5006/c1994-94171.

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Abstract Bed materials obtained from several operating atmospheric pressure, fluidized-bed combustors (FBC)s were characterized to determine physical and chemical differences that may be responsible for causing excessive wear of in-bed evaporator tubes. The two main controlling parameters identified were quartz content and quartz particle size. In addition, the chemical constituents of some coals led to the formation of surface coatings on bed particles that may increase the surface hardness, or may serve to blunt hard or angular particles. The mechanism of formation of such coatings is not un

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Pogorelsky, Igor, Marcus Babzien, Sandra G. Biedron, et al. "Brookhaven's accelerator test facility: a testbed for advanced particle accelerators and lasers." In Laser Technology for Defense and Security XX, edited by Mark S. Zediker and Mark Dubinskii. SPIE, 2025. https://doi.org/10.1117/12.3060504.

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Piot, Philippe, G. Chen, E. Frame, C. Jing, S. Kuzikov, and J. G. Power. "A Compact Short-Wavelength Free-Electron Laser driven by a Two-Beam Acceleration Scheme." In Compact EUV & X-ray Light Sources. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/euvxray.2024.etu3a.5.

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Particle accelerators based on a two-beam acceleration scheme offer a path to high-accelerating fields by p owering the a ccelerating structures using s hort (nanosecond) radiofrequency pulses. In this contribution, we discuss a compact X-ray free-electron laser (FEL) concept based on a ∼ 0.5 GeV accelerator. We present the optimization of the accelerator and FEL process. We also discuss ongoing and planned experiments toward developing an integrated proof-of-principle experiment at Argonne National Laboratory in the vacuum and extreme ultraviolet (V/EUV) regimes.

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Kotaki, H., K. Nakajima, M. Kando, et al. "Laser Wakefield Acceleration Experiments." In Applications of High Field and Short Wavelength Sources. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/hfsw.1997.the24.

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Laser-driven particle accelerators have been conceived over the past decade to be the next-generation particle accelerators, promising super-high field particle acceleration and a compact size compared with conventional accelerators 1). Among a number of laser accelerator concepts, laser wakefield accelerators have great potential to produce ultra-high-field gradients of plasma waves excited by intense ultrashort laser pulses 2). Recently wakefield excitation of the order of ~10GeV/m in a plasma has been directly confirmed by the use of a table-top-terawatt (T3) laser 3).

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Jen, Tien-Chien, Longjian Li, Qinghua Chen, Wenzhi Cui, and Xinming Zhang. "The Acceleration of Micro- and Nano-Particles in Supersonic De-Laval-Type Nozzle." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42583.

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The particle velocity in cold gas dynamic spraying (CGDS) is one of the most important factors that can determine the properties of the bonding to the substrate. The acceleration of gas to particles is strongly dependent on the densities of particles and the particle size. In this paper, the acceleration process of micro-scale and nano-scale copper (Cu) and platinum (Pt) particles in De-Laval-Type nozzle is investigated. A numerical simulation is performed for the gas-particle two phase flow with particle diameter ranging from 100nm to 50μm, which are accelerated by carrier gas Nitrogen in a s

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Fukanuma, H., N. Ohno, B. Sun, and R. Huang. "The Influence of Particle Morphology on In-flight Particle Velocity in Cold Spray." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0097.

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Abstract Cold spray is a relatively recent spray coating technology in which metal or alloy particles are plastically deformed by the kinetic energy of the particles accelerated in a supersonic gas flow through a convergent-divergent nozzle before hitting the substrate. The particle velocity at impact onto the substrate is a key factor in determining the characteristics of the cold spray deposit. Therefore, various studies have been carried out on particle acceleration with the aim of obtaining faster cold spray particle velocities. Mathematical modeling has also been carried out on spherical

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Zhang, Liwen, Weihao Liu, Yunliang Zhu, and Hongliang Xu. "Cascade acceleration of particles in an inverse-Cherenkov particle accelerator using a single laser source." In 2022 Cross Strait Radio Science & Wireless Technology Conference (CSRSWTC). IEEE, 2022. http://dx.doi.org/10.1109/csrswtc56224.2022.10098457.

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Yagami, Hisanori, and Tomomi Uchiyama. "Vortex Simulation for Behavior of Solid Particles Falling in Air." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-12019.

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The behavior of small solid particles falling in an unbounded air is simulated. The particles, initially arranged within a spherical region in a quiescent air, are made to fall, and their fall induces the air flow around them, resulting in the gas-particle two-phase flow. The particle diameter and density are 1 mm and 7.7 kg/m3 respectively. A three-dimensional vortex method proposed by one of the authors is applied. The simulation demonstrates that the particles are accelerated by the induced downward air flow just after the commencement of their fall. It also highlights that the particles ar

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Han, T., W. Li, X. Guo, and X. Yang. "Design of Cold Spray Nozzle to Optimize the Particle Velocity by Numerical Simulation." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0595.

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Abstract This study investigated the accelerating behavior of spray particles during cold spraying (CS) by employing a computational fluid dynamics program, FLUENT. Optimization of the dimensions of CS nozzle was conducted to maximize particle velocity. The results show that the expansion ratio, divergent length, particle density and size, operating temperature significantly influence particle acceleration. It is found that the spray particles in nozzles with long divergent length can obtain a relatively higher impact velocity, but too long divergent length will reduce the particle velocity. B

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Leitz, K. H., M. O’Sullivan, A. Plankensteiner, H. Kestler, and L. S. Sigl. "Open FOAM Modelling of Particle Heating and Acceleration in Cold Spraying." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0589.

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Abstract In cold spraying a powder material is accelerated and heated in the gas flow of a supersonic nozzle to velocities and temperatures that are sufficient to obtain cohesion of the particles to a substrate due to plastic deformation. The deposition efficiency of the powder particles is significantly determined by their velocity and temperature. The particle velocity correlates with the kinetic energy of the particles and thereby with the amount of energy that is converted to plastic deformation and thermal heating. The initial particle temperature significantly influences the mechanical p

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Звіти організацій з теми "Acceleraton of particles"

Pullammanappallil, Pratap, Haim Kalman, and Jennifer Curtis. Investigation of particulate flow behavior in a continuous, high solids, leach-bed biogasification system. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7600038.bard.

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Recent concerns regarding global warming and energy security have accelerated research and developmental efforts to produce biofuels from agricultural and forestry residues, and energy crops. Anaerobic digestion is a promising process for producing biogas-biofuel from biomass feedstocks. However, there is a need for new reactor designs and operating considerations to process fibrous biomass feedstocks. In this research project, the multiphase flow behavior of biomass particles was investigated. The objective was accomplished through both simulation and experimentation. The simulations included

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Steinberg, R. I., and C. E. Lane. Non-accelerator particle physics. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5043726.

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Guo, Fan. Particle acceleration/energization during reconnection. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1340946.

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Dimits, A. M., and J. A. Krommes. Stochastic particle acceleration and statistical closures. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/5111904.

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Guo, Fan. Nonthermal Particle Acceleration in Magnetic Reconnection. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1345962.

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Eweis, Youssef. Electromagnetic Particle Acceleration at Relativistic Speeds. Iowa State University, 2021. http://dx.doi.org/10.31274/cc-20240624-610.

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Mosko, S. (Power converters for particle accelerators). Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6948922.

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Ogitsu, T., A. Devred, and K. Kim. Quench antenna for superconducting particle accelerator magnets. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/91952.

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Shoemaker, Jordan, Janardan Upadhyay, Kip Bishofberger, et al. Assessment of Additive Manufacturing of Particle Accelerator. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/2229654.

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Tourtellott, John. INTEGRATED WORKFLOW MANAGEMENT FOR PARTICLE ACCELERATOR SIMULATION. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1638224.

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