Suppression of microbunching instability in the linac coherent light source

被引：198

作者：

Huang, Z ^{[1
]}

Borland, M

Emma, P

Wu, J

Limborg, C

Stupakov, G

Welch, J

机构：

[1] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2004年 / 7卷 / 07期

关键词：

D O I：

10.1103/PhysRevSTAB.7.074401

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：

A microbunching instability driven by longitudinal space charge, coherent synchrotron radiation, and linac wakefields is studied for the linac coherent light source (LCLS) accelerator system. Since the uncorrelated ( local) energy spread of electron beams generated from a photocathode rf gun is very small, the microbunching gain may be large enough to significantly amplify rf-gun generated modulations or even shot-noise fluctuations of the electron beam. The uncorrelated energy spread can be increased by an order of magnitude to provide strong Landau damping against the instability without degrading the free-electron laser performance. We study different damping options in the LCLS and discuss an effective laser heater to minimize the impact of the instability on the quality of the electron beam.

引用

页码：73 / 82

页数：10

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