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Title: Nonlinear Plasma Waves Excitation by Intense Ion Beams in Background Plasma

Abstract

Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed to describe the plasma response to a propagating ion beam. The model predicts very good charge neutralization during quasi-steady-state propagation, provided the beam pulse duration {tau}{sub b} is much longer than the electron plasma period 2{pi}/{omega}{sub p}, where {omega}{sub p} = (4{pi}e{sup 2}n{sub p}/m){sup 1/2} is the electron plasma frequency and n{sub p} is the background plasma density. In the opposite limit, the beam pulse excites large-amplitude plasma waves. If the beam density is larger than the background plasma density, the plasma waves break. Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron fluid results agree well with the PIC simulations for ion beam propagation through a background plasma. The reduced fluid description derived in this paper can provide an important benchmark for numerical codes and yield scaling relations for different beam and plasma parameters. The visualization of numerical simulation data shows complex collective phenomena during beam entry and exit from the plasma.

Authors:
; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC) (US)
OSTI Identifier:
827835
Report Number(s):
PPPL-3942
TRN: US0403711
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 15 Apr 2004
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 74 ATOMIC AND MOLECULAR PHYSICS; BENCHMARKS; COSMIC RAY PROPAGATION; ELECTRONS; EXCITATION; HEAVY IONS; ION BEAMS; LANGMUIR FREQUENCY; LENSES; PLASMA; PLASMA DENSITY; PLASMA WAVES; SIMULATION; BEAM PLASMA INTERACTIONS; BEAMS,HEAVY ION; NONLINEAR EFFECTS

Citation Formats

Kaganovich, Igor D, Startsev, Edward A, and Davidson, Ronald C. Nonlinear Plasma Waves Excitation by Intense Ion Beams in Background Plasma. United States: N. p., 2004. Web. doi:10.2172/827835.
Kaganovich, Igor D, Startsev, Edward A, & Davidson, Ronald C. Nonlinear Plasma Waves Excitation by Intense Ion Beams in Background Plasma. United States. https://doi.org/10.2172/827835
Kaganovich, Igor D, Startsev, Edward A, and Davidson, Ronald C. 2004. "Nonlinear Plasma Waves Excitation by Intense Ion Beams in Background Plasma". United States. https://doi.org/10.2172/827835. https://www.osti.gov/servlets/purl/827835.
@article{osti_827835,
title = {Nonlinear Plasma Waves Excitation by Intense Ion Beams in Background Plasma},
author = {Kaganovich, Igor D and Startsev, Edward A and Davidson, Ronald C},
abstractNote = {Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed to describe the plasma response to a propagating ion beam. The model predicts very good charge neutralization during quasi-steady-state propagation, provided the beam pulse duration {tau}{sub b} is much longer than the electron plasma period 2{pi}/{omega}{sub p}, where {omega}{sub p} = (4{pi}e{sup 2}n{sub p}/m){sup 1/2} is the electron plasma frequency and n{sub p} is the background plasma density. In the opposite limit, the beam pulse excites large-amplitude plasma waves. If the beam density is larger than the background plasma density, the plasma waves break. Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron fluid results agree well with the PIC simulations for ion beam propagation through a background plasma. The reduced fluid description derived in this paper can provide an important benchmark for numerical codes and yield scaling relations for different beam and plasma parameters. The visualization of numerical simulation data shows complex collective phenomena during beam entry and exit from the plasma.},
doi = {10.2172/827835},
url = {https://www.osti.gov/biblio/827835}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 15 00:00:00 EDT 2004},
month = {Thu Apr 15 00:00:00 EDT 2004}
}