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Title: Suppressing the numerical Cherenkov radiation in the Yee numerical scheme

Abstract

The next generation of laser facilities will routinely produce relativistic particle beams from the interaction of intense laser pulses with solids and/or gases. Their modeling with Particle-In-Cell (PIC) codes needs dispersion-free Maxwell solvers in order to properly describe the interaction of electromagnetic waves with relativistic particles. A particular attention is devoted to the suppression of the numerical Cherenkov instability, responsible for the noise generation. It occurs when the electromagnetic wave is artificially slowed down because of the finite mesh size, thus allowing for the high energy particles to propagate with super-luminous velocities. In the present paper, we show how a slight increase of the light velocity in the Maxwell's equations enables to suppress this instability while keeping a good overall precision of calculations.

Authors:
;
Publication Date:
OSTI Identifier:
22570216
Resource Type:
Journal Article
Journal Name:
Journal of Computational Physics
Additional Journal Information:
Journal Volume: 305; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9991
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; CHERENKOV RADIATION; INSTABILITY; LASERS; NOISE; PARTICLE BEAMS; PULSES; RELATIVISTIC RANGE; SIMULATION; VELOCITY

Citation Formats

Nuter, Rachel, and Tikhonchuk, Vladimir. Suppressing the numerical Cherenkov radiation in the Yee numerical scheme. United States: N. p., 2016. Web. doi:10.1016/J.JCP.2015.10.057.
Nuter, Rachel, & Tikhonchuk, Vladimir. Suppressing the numerical Cherenkov radiation in the Yee numerical scheme. United States. https://doi.org/10.1016/J.JCP.2015.10.057
Nuter, Rachel, and Tikhonchuk, Vladimir. 2016. "Suppressing the numerical Cherenkov radiation in the Yee numerical scheme". United States. https://doi.org/10.1016/J.JCP.2015.10.057.
@article{osti_22570216,
title = {Suppressing the numerical Cherenkov radiation in the Yee numerical scheme},
author = {Nuter, Rachel and Tikhonchuk, Vladimir},
abstractNote = {The next generation of laser facilities will routinely produce relativistic particle beams from the interaction of intense laser pulses with solids and/or gases. Their modeling with Particle-In-Cell (PIC) codes needs dispersion-free Maxwell solvers in order to properly describe the interaction of electromagnetic waves with relativistic particles. A particular attention is devoted to the suppression of the numerical Cherenkov instability, responsible for the noise generation. It occurs when the electromagnetic wave is artificially slowed down because of the finite mesh size, thus allowing for the high energy particles to propagate with super-luminous velocities. In the present paper, we show how a slight increase of the light velocity in the Maxwell's equations enables to suppress this instability while keeping a good overall precision of calculations.},
doi = {10.1016/J.JCP.2015.10.057},
url = {https://www.osti.gov/biblio/22570216}, journal = {Journal of Computational Physics},
issn = {0021-9991},
number = ,
volume = 305,
place = {United States},
year = {Fri Jan 15 00:00:00 EST 2016},
month = {Fri Jan 15 00:00:00 EST 2016}
}