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Design of a prototype laser-plasma injector for the DESY-II synchrotron

The present state of progress in laser wakefield acceleration encourages considering it as a practical alternative to conventional particle accelerators. A promising application would be to use a laser plasma accelerator as an injector for a synchrotron light source. The injector could deliver low charge (∼ 100 pC) beams to top up the storage ring and reduce the load on the chain of conventional injectors. Yet, the energy spread and jitter of the laser plasma beam pose a significant difficulty for an efficient injection. In this paper we propose a design of a prototype injector to deliver 500 MeV low-intensity electron bunches to the DESY-II electron synchrotron. The design utilizes presently available conventional accelerator technology, such as a chicane and an X-band radio frequency cavity, to reduce the energy spread and jitter of the electron beam down to a sub-per-mille level.