Suppression of microbunching instability in the linac coherent light source

By Zhirong Huang, M. Borland, P. Emma, Jihuai Wu, C. Limborg, G. Stupakov, J. Welch. 2004

196 citations recorded by the source corpus.

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.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering, Radiation

View Paper: https://www.semanticscholar.org/paper/a1f0e5ebaebc40aa30d21113a0add8b1ca36a2a1

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

1. D. Xiang
2. E. Hemsing
3. G. Stupakov
4. Alexander Zholents

In Electrical and Electronic Engineering

1. D. Xiang
2. E. Hemsing
3. G. Stupakov
4. Alexander Zholents

In Radiation

1. E. Hemsing
2. D. Xiang
3. G. Stupakov
4. Alexander Zholents

Citations in the corpus

• Beam by design: laser manipulation of electrons in modern accelerators (2014, methodology): “…Xiang and Stupakov, 2009; Yu, 1991); laser heaters, which are used to suppress the microbunching instability to produce higher radiation power (Huang et al., 2004a); periodically modulated beams for the generation of mode-locked x-rays (Feng et al., 2012; Kur et al., 2011; Thompson and…”