Multi-proton bunch driven hollow plasma wakefield acceleration in the nonlinear regime
Multi-proton bunch driven hollow plasma wakefield acceleration in the nonlinear regime
复制标题
DOI：
10.1063/1.4995354
复制
发表时间：
2017-07
期刊：
影响因子：
--
通讯作者：
Yangmei Li;G. Xia;K. Lotov;A. Sosedkin;K. Hanahoe;O. Mete-Apsimon
中科院分区：
文献类型：
--
作者：
Yangmei Li;G. Xia;K. Lotov;A. Sosedkin;K. Hanahoe;O. Mete-Apsimon
质子驱动的等离子体韦克菲尔德场加速已经在模拟中被证明能够在单个阶段中将粒子加速到能量前沿，但是其潜力受到以下事实的阻碍：目前可用的质子聚束比等离子体波长长几个数量级。幸运的是，质子微聚束允许共振驱动等离子体波。在本文中，我们提出使用一个中空的等离子体通道多质子束驱动等离子体韦克菲尔德加速，并证明它使非线性制度和共振激发强等离子体波的操作。这种新的制度还涉及用于加速束的中空通道（诸如发射度保持和均匀加速场）和用于驱动束的稳定减速的长桶的有益特征。在等离子体趋肤深度、驱动器半径、空心通道半径和微聚束周期之间的适当比例下，获得了该区域。
Proton-driven plasma wakefield acceleration has been demonstrated in simulations to be capable of accelerating particles to the energy frontier in a single stage, but its potential is hindered by the fact that currently available proton bunches are orders of magnitude longer than the plasma wavelength. Fortunately, proton micro-bunching allows driving plasma waves resonantly. In this paper, we propose using a hollow plasma channel for multiple proton bunch driven plasma wakefield acceleration and demonstrate that it enables the operation in the nonlinear regime and resonant excitation of strong plasma waves. This new regime also involves beneficial features of hollow channels for the accelerated beam (such as emittance preservation and uniform accelerating field) and long buckets of stable deceleration for the drive beam. The regime is attained at a proper ratio among plasma skin depth, driver radius, hollow channel radius, and micro-bunch period.