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TY - CONF AU - Wang, P. AU - Cao, D.Z. AU - Chen, H.B. AU - Shi, J. AU - Wang, Z.H. AU - Zha, H. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - RF System Based on Two Klystrons and Phase Modulation for Photo-Cathode Injector J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - We proposed an RF system with two klystrons, of which the powers are combined by a 3dB-hybrid. By managing the phases of the two klystrons respectively, the two pulses from the two output ports of the 3dB-hybrid can be of different powers, phases, and shapes. One of the two pulses can be set to an RF gun, while the other one can feed traveling accelerating structures. Two methods of phase modulation were proposed based on this scheme. Comparing with the state-of-art RF system, the new one can be of high efficiency or can generate electron beams with higher energy. The detailed analysis of the two methods and some experiments are described in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3996 EP - 3998 KW - gun KW - klystron KW - linac KW - experiment KW - cathode DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-THPAL149 UR - http://jacow.org/ipac2018/papers/thpal149.pdf ER -