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TY - CONF AU - Eckoldt, H.-J. AU - Choroba, S. AU - Frei, M. AU - Grevsmühl, T. AU - Hauberg, A. AU - Havlicek, J. AU - Heidbrook, N. AU - Keens, S.G. AU - Leich, H. AU - Machau, K. AU - Ngada, N. AU - Strittmatter, T.H. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - XFEL Modulators with Pulse Cables 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 - The modulators of the European XFEL produce high voltage, at the 10kV level, having a power of up to 16.8 MW for 1.54 ms. The operation frequency of the super-conducting inac is 10 Hz. The series production of the 29 modulators started in 2012. The first modulator began operation in 2014 and the start of linac was beginning 2017. The R&D phase for the modulators started directly with the development of superconducting cavities. Besides the pulse generation, the modulator had to suppress the 10 Hz repetition rate in order not to disturb the grid. Another unique demand was the development of pulse cables. Since the power RF had to be generated in the tunnel, the klystrons were installed near the cavities. However, the modulators had to be installed outside of the tunnel for space, maintenance reasons and radiation concerns. This transmission of high power pulses via long cables is unique in the world and the suppression of EMI effects was mandatory. During the first year operation no EMI disturbances of other systems were detected and the modulator system works as expected. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2487 EP - 2489 KW - FEL KW - operation KW - klystron KW - linac KW - radiation DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-WEPMF053 UR - http://jacow.org/ipac2018/papers/wepmf053.pdf ER -