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TY - CONF AU - Vogel, E. AU - Barbanotti, S. AU - Hartl, I. AU - Jensch, K. AU - Klinke, D. AU - Kostin, D. AU - Lorkiewicz, J.A. AU - Möller, W.-D. AU - Nietubyć, R. AU - Schmökel, M. AU - Sekutowicz, J.K. AU - Sievers, S. AU - Smedley, J. AU - Steinhau-Kühl, N. AU - Sulimov, A.A. AU - Teichert, J. AU - Thie, J.H. AU - Weise, H. AU - Wiencek, M. AU - Winkelmann, L. AU - van der Horst, B. ED - Schaa, Volker RW ED - Pei, Guoxi ED - Chin, Yong Ho ED - Fu, Shinian ED - Zhao, Ning TI - SRF Gun Development at DESY J2 - Proc. of LINAC2018, Beijing, China, 16-21 September 2018 CY - Beijing, China T2 - Linear Accelerator Conference T3 - 29 LA - english AB - A future upgrade of the European XFEL (E-XFEL) foresees an additional cw operation mode increasing the flexibility in the photon beam time structure. This mode requires among others a cw operating photo injector. We believe that using an SRF gun is the preferred approach as the beam parameters of normal conducting pulsed guns can be potentially met by SRF guns operating cw. Since more than a decade DESY in collaboration with TJNAF, NCBJ, BNL, HZB and HZDR performs R&D to develop an all superconducting RF gun with a lead cathode. In the frame of E-XFEL cw upgrade feasibility studies, the SRF-gun R&D program gained more attention and support. Within the next few years we would like to demonstrate the performance of the all superconducting injector required for the E-XFEL upgrade. The selected approach offers advantages w.r.t. the cleanliness of the superconducting surface, but requires a complete disassembly of a cryostat and stripping the gun cavity in a clean room to exchange the cathode. Thus it is practical only when the life time of the cathode is at least several months. In this paper we present the actual status of the R&D program, next steps and the longer term plans. PB - JACoW Publishing CP - Geneva, Switzerland SP - 105 EP - 108 KW - gun KW - cathode KW - cavity KW - SRF KW - laser DA - 2019/01 PY - 2019 SN - 2226-0366 SN - 978-3-95450-194-6 DO - DOI: 10.18429/JACoW-LINAC2018-MOPO037 UR - http://jacow.org/linac2018/papers/mopo037.pdf ER -