TELBE the coherent THz facility at ELBE: Enroute to naturally synchronized THz pump THz probe experiments beyond the 100 microjoule pulse energy limit

At the ELBE accelerator at the HZDR a new electron beamline, providing for femtosecond electron bunches with nC bunch charges and repetition rates in the 1 – 200 kHz regime is currently constructed. The 40 MeV electrons will be used in photon-electron interaction experiments with TW and PW class laser and for the generation of broad band and narrow bandwidth coherent THz pulses in the frequency range between 0.1 THz – 3 THz. Similar to previous work at FLASH the natural synchronization between light pulses generated by the same electron bunch shall be employed for fully synchronized experiments between narrow and broad band THz pulses as well as for novel electron bunch diagnostic (see also poster WEAP13). Pulse energies are expected to exceed the 100 μJ limit at scalable repetition rates between 1 and 200 kHz. The current status of the project and planned experiments are presented.