| Paper | Title | Page |
|---|---|---|
TUP056 |
Electron Beam De-chirping in a Plasma | |
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| Beam-driven plasma wakefield acceleration (PWFA) is a promising and evolving technique for next-generation, compact light sources. By propagating a dense drive-beam through a plasma, expelled plasma electrons can excite wakefields supporting electric fields in excess of 10 GV/m. Like in a conventional radio-frequency cavity, the acceleration strongly depends on the injection phase with respect to the wakefield. Different injection schemes have been proposed recently, all having in common a significant time-energy correlation, the so-called energy-chirp. These energy-chirps typically lead to energy bandwidths of up to 10% in PWFA, hampering efficient beam transport and eventually any kind of free-electron laser (FEL) application. Analogous to short-range wakefields generated by electron beams in a resistive beam pipe, the wakefields generated by the electron beam in a plasma can be used to compensate the initial energy-chirp. Here we present the idea of electron beam de-chirping in a plasma and show the conditions for optimal de-chirping with simultaneous beam quality preservation. This is the basis for efficient beam transport and thus paves the way for FELs utilizing PWFA. | ||