Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

In May 2014 the 1st superconducting photo injector (SRF gun) at HZDR was replaced by a new gun, featuring a new resonator and a new cryostat. The intention for this upgrade was to reach higher beam energy, higher bunch charge and lower emittance at the same time. With the improved parameters user experiments of the superconducting CW accelerator ELBE are to be served, that benefit from an increased average beam current at a given repetition rate of some hundred kHz. Although the cavity performance stays behind its specifications, the SRF gun has been optimized for an operation mode at 200 pC and a repetition rate of 100 kHz to generate four times more THz pulse energy then possible by ELBE's thermionic injector. Because of this significant improvement, the new gun has been recently used for first user shifts at the THz facility at ELBE. In this contribution we will report on first results and operational experiences.