Emittance preservation in plasma-based accelerators with ion motion

被引：32

作者：

Benedetti, C. ^{[1
]}

Schroeder, C. B. ^{[1
]}

Esarey, E. ^{[1
]}

Leemans, W. P. ^{[1
]}

机构：

[1] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2017年 / 20卷 / 11期

关键词：

ELECTRON-ACCELERATORS; LINEAR COLLIDER; WAKEFIELD; PHYSICS;

D O I：

10.1103/PhysRevAccelBeams.20.111301

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In a plasma-accelerator-based linear collider, the density of matched, low-emittance, high-energy particle bunches required for collider applications can be orders of magnitude above the background ion density, leading to ion motion, perturbation of the focusing fields, and, hence, to beam emittance growth. By analyzing the response of the background ions to an ultrahigh density beam, analytical expressions, valid for nonrelativistic ion motion, are derived for the transverse wakefield and for the final (i.e., after saturation) bunch emittance. Analytical results are validated against numerical modeling. Initial beam distributions are derived that are equilibrium solutions, which require head-to-tail bunch shaping, enabling emittance preservation with ion motion.

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页数：9

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