Fel Operation with the Superconducting Rf Photo Gun at Elbe
نویسندگان
چکیده
The superconducting RF photoinjector (SRF gun) operating with a 31⁄2-cell niobium cavity and Cs2Te photocathodes is installed at the ELBE radiation center. Since 2012 a new UV driver laser system developed by MBI has been installed for the SRF gun. It delivers CW or burst mode pulses with 13 MHz repetition rate or with reduced rates of 500, 200, and 100 kHz at an average UV laser power of about 1 W. The new laser allows the gun to serve as a driver for the infrared FELs at ELBE. In the first successful experiment a 260 μA beam with 3.3 MeV from the SRF gun was injected into the ELBE linac, further accelerated, and then guided to the FEL. First lasing was achieved at 41 μm wavelength. The spectrum, detuning curve and further parameters were measured.
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