Results 31 to 40 of about 67,146 (302)
Acceleration of particles by acceleration horizons [PDF]
Physical Review D, 2013 We consider collision of two particles in the vicinity of the extremal acceleration horizon (charged or rotating) that includes the Bertotti-Robinson space-time and the geometry of the Kerr throat. It is shown that the energy in the centre of mass frame E_{c.m.} can become indefinitely large if parameters of one of the particles are fine-tuned, so the ...
openaire +2 more sources
Particle acceleration by fluctuating electric fields at a magnetic field null point [PDF]
, 2007 Particle acceleration consequences from fluctuating electric ields superposed on an X-type magnetic field in collisionless solar plasma are studied.
P. Petkaki +3 more
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Journal of Taibah University for Science, 2020 Spherical silver nanoparticles of required size were synthesized employing a seed-mediated approach using leaf extract of Azadirachta indica. Reaction pH was used to manipulate the rate of reduction of the precursor salt for achieving a fast rate of ...
Ashu Jain +2 more
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On White Holes as Particle Accelerator [PDF]
Gravitation and Cosmology, 2018 We analyze scenarios of particle collisions in the metric of a nonextremal black hole that can potentially lead to ultrahigh energy $E_{c.m.}$ in their centre of mass frame. Particle 1 comes from infinity to the black hole horizon while particle 2 emerges from a white hole region.
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Feedback learning particle swarm optimization [PDF]
, 2011 This is the author’s version of a work that was accepted for publication in Applied Soft Computing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may ...
Tang, Y +5 more
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Particle acceleration at reconnecting separator current layers [PDF]
, 2015 The aim of this work is to investigate and characterise particle behaviour in a 3D MHD model of a reconnecting magnetic separator. We use a relativistic guiding-centre test-particle code to investigate electron and proton acceleration in snapshots from ...
E. Parnell, C. +7 more
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An adaptive mutation operator for particle swarm optimization [PDF]
, 2008 Copyright @ 2008 MICParticle swarm optimization (PSO) is an effcient tool for optimization and search problems. However, it is easy to betrapped into local optima due to its in-formation sharing mechanism.
Yang, S +5 more
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Architecture Design for Particle Transport Code Acceleration [PDF]
Jisuanji kexue, 2022 The stochastic simulation method of particle transport is usually used to solve the characteristic quantity of a large number of moving particles.Particle transport problems are widely found in the fields of medicine,astrophysics and nuclear phy-sics.The
FU Si-qing, LI Tie-jun, ZHANG Jian-min
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Particle acceleration at a reconnecting magnetic separator [PDF]
, 2014 While the exact acceleration mechanism of energetic particles during solar flares is (as yet) unknown, magnetic reconnection plays a key role both in the release of stored magnetic energy of the solar corona and the magnetic restructuring during a flare.
Parnell, Clare Elizabeth +7 more
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Neutral particle acceleration by spatially modulated laser pulses
New Journal of Physics, 2023 The velocity gain of neutral particles (atoms, molecules, etc) from laser acceleration is always small. A possible scheme to obtain a high speed neutral particle beam is multistage acceleration. However, according to previous theoretical and experimental
J Y Yan, W Wang, Q Wei, P X Wang
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