Suppression of microbunching instability with magnetic bunch length compression in a linac-based free electron laser

Suppression of microbunching instability with magnetic bunch length compression in a linac-based free electron laser

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The aim of this paper is to investigate the effect of the magnetic bunch length compression on the development of the vegetable glycerin for sale microbunching instability.It will be shown that, after removing the linear energy chirp required for the compression, an additional and properly tuned R_{56} transport matrix element is able to dilute the initial energy modulation and to suppress the current spikes created by the microbunching instability without affecting the bunch length.A by-product of the study is the observation that a single compressor is more effective ventilationstejp than the two-compressors scheme in reducing the unwanted modulations caused by the microbunching instability.

The study is based on analytical calculations and on the simulation code elegant.