Coupled beam hose and self-modulation instabilities in overdense plasma

Transverse stability of the drive beam is critical to plasma wakefield accelerators. A long, relativistic particle beam propagating in an overdense plasma is subject to beam envelope modulation and centroid displacement (hosing) instabilities. Coupled equations for the beam centroid and envelope are...

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Published inPhysical review. E, Statistical, nonlinear, and soft matter physics Vol. 86; no. 2 Pt 2; p. 026402
Main Authors Schroeder, C B, Benedetti, C, Esarey, E, Grüner, F J, Leemans, W P
Format Journal Article
LanguageEnglish
Published United States 06.08.2012
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Summary:Transverse stability of the drive beam is critical to plasma wakefield accelerators. A long, relativistic particle beam propagating in an overdense plasma is subject to beam envelope modulation and centroid displacement (hosing) instabilities. Coupled equations for the beam centroid and envelope are derived and solved. It is shown that the hosing growth rate is comparable to self-modulation, and coupling of the self-modulation enhances beam hosing and induces harmonic content. Large amounts of hosing significantly alters the structure of the plasma wakefields.
ISSN:1550-2376
DOI:10.1103/PhysRevE.86.026402