Maximal gradient E0T MVm 14.0 Nominal energy gain MeV 20.18

The normal conducting booster cavity is intended to in-crease the electron bunch energy in the Photo Injector Test (DESY, Zeuthen) stage 2 experiments [1]. The normal con-ducting cavity is selected due to infrastructure particulari-ties in DESy Zeuthen. The L-band cavity is designed to provide the accelerating gradient up to 14 MV/m with the total input rf power up to 8.6 MW, rf pulse length up to 900 mks and repetition rate 5 Hz. The multi-cell cavity is based on the CDS compensated accelerating structure with the improved coupling coefficient value. The main design ideas and decisions are described briefly together with cav-ity parameters- rf properties, cooling and pumping circuits