Building the third SRF Gun at HZDR

The multipurpose accelerator ELBE at HZDR which is delivering a large set of secondary beams, is driven by a thermionic DC injector. In order to enhance the beam quality of the machine, the development of superconducting RF injector has been pursued since the early 2000’s. The corresponding ELBE SRF Gun I of 2007 and Gun II of 2014 already delivered beam for the operation of several user beamlines, such as the FEL, positron generation, and THz facility. Currently, the next version – Gun III – and its cryomodule are being assembled, characterized, and prepared for the final commissioning throughout late 2017/early 2018. The new module benefits from the experiences gained with regard to emittance compensation and monitoring of operation variables made with the two predecessors.