Coupled beam hose and self-modulation instabilities in overdense plasma.
Coupled beam hose and self-modulation instabilities in overdense plasma.
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DOI：
10.1103/physreve.86.026402
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
C. Schroeder;C. Benedetti;E. Esarey;F. Grüner;W. Leemans
中科院分区：
文献类型：
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作者：
C. Schroeder;C. Benedetti;E. Esarey;F. Grüner;W. Leemans
驱动光束的横向稳定性对等离子体尾流场加速器至关重要。在过密等离子体中传播的长相对论粒子束受到束包络调制和质心位移（软管）不稳定的影响。推导并求解了梁质心和包络线的耦合方程。结果表明，光束的管腔增长率与自调制相当，自调制的耦合增强了波束的管腔并诱导了谐波含量。大量的软管显著地改变了等离子体尾流场的结构。
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.