Towards a combined THz/X-ray source : report IV of the series of reports by the Swedish FEL Center and the FREIA Group

In the framework of development of a Free Electron Laser (FEL) by the Swedish FEL Center and theFREIA laboratory, we discuss the design of a versatile combined THz/X-ray source driven by high-brightness electron bunches produced by a superconducting linear accelerator. The ultimate goal isto build a versatile photon source for multidisciplinary research at the FREIA laboratory of UppsalaUniversity. A signicant part of equipment is potentially available via the FREIA project at UppsalaUniversity after 2018 such as the cryogenic system, the system of power generation and transportation,control and data acquisition systems. For pump-probe experiments, we discus a possibility to combinethe THz source with an X-ray source based on the inverse Compton scattering of quantum laser pulsesfrom electron bunches. The X-ray source will operate in the \water window" with an output intensitycomparable to a second generation synchrotron. The envisioned THz/X-ray source is compact andcomparable in budget to the cost of one beamline at MAX IV. The source can also be used to trainstudents in accelerator physics and applications of THz and synchrotron radiation.the FREIA projectthe Swedish FEL Cente