Hosing Instability Suppression in Self-Modulated Plasma Wakefields
Hosing Instability Suppression in Self-Modulated Plasma Wakefields
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DOI：
10.1103/physrevlett.112.205001
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发表时间：
2014-04
影响因子：
8.6
通讯作者：
J. Vieira;W. Mori;P. Muggli
中科院分区：
文献类型：
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作者：
J. Vieira;W. Mori;P. Muggli
我们表明，如果等离子体密度扰动是线性的，则在长粒子束的自调制不稳定性饱和后，可以抑制软管不稳定性。我们推导出最大束倾斜的缩放比例和自调制不稳定性的种子，以确保超出自调制饱和的稳定传播。简化的软管方程的数值解和三维颗粒细胞模拟证实了我们的分析结果。当一串粒子束或激光脉冲激发线性尾迹时，我们的结果也可能适用。
We show that the hosing instability can be suppressed after the saturation of the self-modulation instability of a long particle bunch if the plasma density perturbation is linear. We derive scalings for maximum bunch tilts and seeds for the self-modulation instability to ensure stable propagation beyond saturation of self-modulation. Numerical solutions of the reduced hosing equations and three-dimensional particle-in-cell simulations confirm our analytical findings. Our results may also apply when a train of particle bunches or laser pulses excites a linear wake.