Filters








29 Hits in 7.7 sec

Parallelization of plasma simulation codes: gridless finite size particle versus particle in cell approach

S. Briguglio, G. Vlad, B. Di Martino, G. Fogaccia
2000 Future generations computer systems  
The main features of gridless finite-size-particle codes are examined and compared with those of particle-in-cell ones, from the point of view of the performances that can be obtained, with respect to  ...  both the spatial-resolution level and the efficiency of parallel particle simulations.  ...  Conclusions In the present paper, we have shown that, in the framework of the gridless finite-size-particle approach, highly efficient parallel particle simulations can be obtained.  ... 
doi:10.1016/s0167-739x(99)00125-9 fatcat:uiudcoy7yzfnjbtzkhe4bi27oy

Gridless finite-size-particle plasma simulation

G. Vlad, S. Briguglio, G. Fogaccia, B.Di Martino
2001 Computer Physics Communications  
convenient path toward the target of an efficient parallelization and, hence, toward the high-resolution simulations: namely, the gridless finite-size-particle (FSP) approach.  ...  The main features of gridless finite-size-particle (FSP) codes are discussed, from the point of view of the performances that can be obtained, with respect both to the spatial-resolution level and the  ...  Conclusions In the present paper we have reconsidered the suitability of the gridless finite-size-particle approach to plasma physics particle simulation.  ... 
doi:10.1016/s0010-4655(00)00191-0 fatcat:44wyy77t3ndxhjoo75wdzk3i5m

Symplectic multi-particle tracking on GPUs

Zhicong Liu, Ji Qiang
2018 Computer Physics Communications  
Using a single GPU processor, the code achieves a factor of 2-10 speedup for a range of problem sizes compared with the time on a single state-of-the-art Central Processing Unit (CPU) node with similar  ...  The symplectic tracking model can preserve phase space structure and reduce non-physical effects in long term simulation, which is important for beam property evaluation in particle accelerators.  ...  These gridless finite-size particle plasma models are either electrostatic or gyrokinetic and are not particle tracking models typically employed in beam physics study.  ... 
doi:10.1016/j.cpc.2018.02.001 fatcat:ashzlqigljbkfkqov5zmoek2aa

ORB5: a global electromagnetic gyrokinetic code using the PIC approach in toroidal geometry [article]

E. Lanti, N. Ohana, N. Tronko, T. Hayward-Schneider, A. Bottino, B. F. McMillan, A. Mishchenko, A. Scheinberg, A. Biancalani, P. Angelino, S. Brunner, J. Dominski (+11 others)
2019 arXiv   pre-print
This paper presents the current state of the global gyrokinetic code ORB5 as an update of the previous reference [Jolliet et al., Comp. Phys. Commun. 177 409 (2007)].  ...  Variants of the physical model can be selected for electrons such as assuming an adiabatic response or a "hybrid" model in which passing electrons are assumed adiabatic and trapped electrons are drift-kinetic  ...  The authors deeply acknowledge past valuable contributions of Dr. T. M. Tran to the Orb5 code development. Fruitful discussions with S. Ethier are gratefully acknowledged.  ... 
arXiv:1905.01906v1 fatcat:feiywilk5zevzm4nbomufym6pi

ENZO: AN ADAPTIVE MESH REFINEMENT CODE FOR ASTROPHYSICS

Greg L. Bryan, Michael L. Norman, Brian W. O'Shea, Tom Abel, John H. Wise, Matthew J. Turk, Daniel R. Reynolds, David C. Collins, Peng Wang, Samuel W. Skillman, Britton Smith, Robert P. Harkness (+16 others)
2014 Astrophysical Journal Supplement Series  
, self-gravity of fluids and particles), primordial gas chemistry, optically-thin radiative cooling of primordial and metal-enriched plasmas (as well as some optically-thick cooling models), radiation  ...  In addition to explaining the algorithms implemented, we present solutions for a wide range of test problems, demonstrate the code's parallel performance, and discuss the Enzo collaboration's code development  ...  of particles as the number of grid cells in the Enzo simulation.  ... 
doi:10.1088/0067-0049/211/2/19 fatcat:fmam4dequvaqvm7bpo7jwnqnja

Particle simulation of plasmas: review and advances

J P Verboncoeur
2005 Plasma Physics and Controlled Fusion  
Particle simulation of plasmas, employed since the 1960s, provides a selfconsistent, fully kinetic representation of general plasmas.  ...  While particle codes still enjoy prominance in a number of basic physics areas, they are now often used for engineering devices as well.  ...  Most of all, the author is grateful to the many members of this community, far too numerous to name, upon whose shoulders he stands, especially the one who mentored so many of us: CK (Ned) Birdsall.  ... 
doi:10.1088/0741-3335/47/5a/017 fatcat:dyjiveoqojcfxjxtz7uoq4wszi

Scaling of the proton density reduction scheme for the laser acceleration of proton beams with a narrow energy spread

A P L Robinson, P Gibbon, S M Pfotenhauer, O Jäckel, J Polz
2009 Plasma Physics and Controlled Fusion  
The laser acceleration of proton beams with quasi-monoenergetic features in the energy spectra from microdot targets is investigated by numerical simulation.  ...  The scaling of the spectral peak's energy, and number of protons in the spectral peak, with both microdot composition and laser intensity is considered.  ...  Acknowledgments We are grateful for the use of computing resources provided by Science  ... 
doi:10.1088/0741-3335/51/2/024001 fatcat:ouzjiooz4ja25cuwowb3fow25e

The intense slow positron source concept: A theoretical perspective on a proposed INEL facility

Henry Makowitz, James D. Abrashoff, William H. Landman, Richard K. Albano, Toshiki Tajima, James Daniel Larson
1994 AIP Conference Proceedings  
Plots of relative number of escaping particles versus radius were made at the exit aperture. These are also binned in radius.  ...  For such a concentric grid, the effects of the finite grid mesh size have also been examined.  ... 
doi:10.1063/1.45553 fatcat:yvylnz4sm5egdeq7t65aybqs4u

Simulation study of solar wind push on a charged wire: basis of solar wind electric sail propulsion

P. Janhunen, A. Sandroos
2007 Annales Geophysicae  
It is possible that artificial electron heating of the plasma in the interaction region could increase the propulsive effect even further.</p>  ...  We use 1-D and 2-D electrostatic plasma simulations to calculate the force and present a semitheoretical formula which captures the simulation results.  ...  Daglis thanks two referees for their help in evaluating this paper.  ... 
doi:10.5194/angeo-25-755-2007 fatcat:pdyeujlhhfcetmnx4ja2tz7fgi

Simulating Galaxy Clusters [article]

Michael L. Norman
2010 arXiv   pre-print
relations, overview of numerical methods, simulating gas in galaxy clusters, basic results on adiabatic clusters (Santa Barbara cluster comparison project), effect of additional physics, recent progress  ...  in galaxy clustering modeling (Galcons, turbulence, AGN jets, cluster-wide B-fields), simulating statistical samples and lightcones, and simulated SZE surveys.  ...  in a 0.3 solar metallicity plasma.  ... 
arXiv:1005.1100v1 fatcat:zay6tqlzojeo5jlc7f6u2kbicy

The 2012 Plasma Roadmap

Seiji Samukawa, Masaru Hori, Shahid Rauf, Kunihide Tachibana, Peter Bruggeman, Gerrit Kroesen, J Christopher Whitehead, Anthony B Murphy, Alexander F Gutsol, Svetlana Starikovskaia, Uwe Kortshagen, Jean-Pierre Boeuf (+4 others)
2012 Journal of Physics D: Applied Physics  
The plasma parameters can span many orders of magnitude and applications are found in quite different areas of daily life and industrial production.  ...  Journal of Physics D: Applied Physics is addressing this need for clarity and thus providing guidance to the field by this special Review article, The 2012 Plasma Roadmap.  ...  This roadmap was created with reference to the roadmap [16] prepared by the plasma electronics division of the Japan Society of Applied Physics (JSAP).  ... 
doi:10.1088/0022-3727/45/25/253001 fatcat:eylokekmwfdqnbqqwdn5srjuua

Cluster explosion in an intense laser pulse: Thomas-Fermi model

Marian Rusek, Hervé Lagadec, Thomas Blenski
2000 Physical Review A. Atomic, Molecular, and Optical Physics  
A stepwise character of the explosion is observed in which atomic shells are expelled sequentially.  ...  A refined three-dimensional version of the time-dependent Thomas-Fermi model is used to qualitatively study the explosion of rare-gas atomic clusters in an intense laser field.  ...  We thank Maciej Lewenstein for many stimulating discussions and encouragement during the initial phase of this work. We also acknowledge Jaś Mostowski for providing us with his computer resources.  ... 
doi:10.1103/physreva.63.013203 fatcat:f4wmux3hxzap7luoltimqoehx4

Ion acceleration by superintense laser-plasma interaction

Andrea Macchi, Marco Borghesi, Matteo Passoni
2013 Reviews of Modern Physics  
In this paper we give an overview of the state-of-the art of ion acceleration by laser pulses as well as an outlook on its future development and perspectives.  ...  We describe the main features observed in the experiments, the observed scaling with laser and plasma parameters and the main models used both to interpret experimental data and to suggest new research  ...  ACKNOWLEDGMENTS We acknowledge support of EPSRC, Grant No. EP/ E035728/1 (LIBRA consortium), the Ministry of Education of the Czech Republic (Projects ECOP No.  ... 
doi:10.1103/revmodphys.85.751 fatcat:jlmsprtve5dc3mlxom5xv66yaq

Improvement of methods for evaluating the spacecraft pressure wall penetration probability
Совершенствование методики оценки вероятности пробоя стенок конструкции космических аппаратов

Б.Т. Добрица, Д.Б. Добрица, Б.Ю. Ященко
2017 Engineering Journal Science and Innovation  
Nölke 4.0 rev.1 13.3.2006 2.4 Column for MODAOST added in benchmark tables (cube, sphere, simple space station) and inclusion of first benchmarks for NASA91, ORDEM2000 and meteoroid environment MDPANTO  ...  Nölke 4.0 rev.3 1.4.2008 Completed ver. 4.0 Updated Bumper code meteoroid results for sphere, cube and space station (to reflect constant meteoroid density of 1.0g/cm 3 as required by the calibration case  ...  Typically, multiple battery cells are wired in series and parallel, so that loss of one cell will not result in significant loss of overall spacecraft battery power.  ... 
doi:10.18698/2308-6033-2017-7-1633 fatcat:5yllvkcwhbfvrlium43u6j4wre

Update on the Scientific Status of the Plasma Focus

Sunil Auluck, Pavel Kubes, Marian Paduch, Marek J. Sadowski, Vyacheslav I. Krauz, Sing Lee, Leopoldo Soto, Marek Scholz, Ryszard Miklaszewski, Hellmut Schmidt, Alexander Blagoev, Maurizio Samuelli (+13 others)
2021 Plasma  
Its focus is on understanding the principal defining characteristic features of the plasma focus in the light of the developments that have taken place in the last 20 years, in terms of new facilities,  ...  A future course of action is suggested that individual plasma focus laboratories could adopt in order to positively influence the future growth of research in this field, to the general benefit of not  ...  He would also like to thank Valery Nikulin for access to his work on the Frascati plasma focus and Ming Fang Lu for making available unpublished material from his research. P.  ... 
doi:10.3390/plasma4030033 fatcat:jymqlyp76jadpled5y6ana2bru
« Previous Showing results 1 — 15 out of 29 results