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TY - CPAPER AU - Arnold, A. AU - Ciovati, G. AU - Freitag, M. AU - Kneisel, P. AU - Lu, P.N. AU - Murcek, P. AU - Stirbet, M. AU - Teichert, J. AU - Turlington, L. AU - Vennekate, H. AU - Xiang, R. TI - RF Performance Results of the 2nd ELBE SRF Gun J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - As in 2007 the first 3.5 cell superconducting radio frequency (SRF) gun was taken into operation at Helmholtz-Zentrum Dresden-Rossendorf, it turned out that the specified performance to realize an electron energy of 9.4 MeV has not been achieved. Instead, the resonator of the gun was limited by field emission to about one third of this value and the measured beam parameters remained significantly below its expectations. However, to demonstrate the full potential of this electron source for the ELBE linear accelerator, a second and slightly modified SRF gun was developed and built in collaboration with Thomas Jefferson National Accelerator Facility. We will report on commissioning of this new SRF gun and present a full set of RF performance results. Additionally, investigations are shown that try to explain a particle contamination that happened recently during our first cathode transfer. PB - JACoW CY - Geneva, Switzerland SP - 1227 EP - 1230 KW - gun KW - SRF KW - cavity KW - electron KW - cathode DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB055 UR - http://srf2015.vrws.de/papers/thpb055.pdf ER -