High-quality electron beam generation in a proton-driven hollow plasma wakefield accelerator
High-quality electron beam generation in a proton-driven hollow plasma wakefield accelerator
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DOI：
10.1103/physrevaccelbeams.20.101301
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发表时间：
2016-10
影响因子：
1.7
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：
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作者：
Yangmei Li;G. Xia;K. Lotov;A. Sosedkin;K. Hanahoe;O. Mete-Apsimon
对质子驱动的等离子体尾场加速器的模拟表明，与传统加速器相比，加速梯度要高得多，并且在单个等离子体阶段将电子加速到能量前沿是可行的。然而，由于强的本征横场在径向和时间上的变化，光束质量仍然远远不适合在未来的对撞机上实际应用。在这里，我们提出了一种有效的质子驱动的空心通道加速机制。在这种情况下，电子见证束团位于加速场较强的区域，没有等离子体电子和离子。结果表明，在700m的单通道中，携带约10%1TeV质子驱动电荷的见证电子束可以在保持归一化发射度的情况下加速到0.6TeV，这一高质量和高电荷的电子束可能为未来等离子体能量前沿对撞机的发展铺平道路。
Simulations of proton-driven plasma wakefield accelerators have demonstrated substantially higher accelerating gradients compared to conventional accelerators and the viability of accelerating electrons to the energy frontier in a single plasma stage. However, due to the strong intrinsic transverse fields varying both radially and in time, the beam quality is still far from suitable for practical application in future colliders. Here we propose an efficient proton-driven accelerating regime in a hollow channel. In this regime, the electron witness bunch is positioned in the region with a strong accelerating field, free from plasma electrons and ions. We show that the witness electron beam carrying the charge of about 10% of 1 TeV proton driver charge can be accelerated to 0.6 TeV with preserved normalized emittance in a single channel of 700 m. This high quality and high charge beam may pave the way for the development of future plasma-based energy frontier colliders.