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TY - CPAPER AU - Novokhatski, A. TI - Propagation of the High Frequency Fields in the Chain of the Superconducting Cavities J2 - Proc. of International Conference on RF Superconductivity (SRF2015), Whistler, BC, Canada, Sept. 13-18, 2015 AB - Combination with the very high repetion rate requires to use the superconducting cavities to accelerate very short bunches for the FEL operation.. In the cavities these bunches excite very high frequency electromagnetic fields. There are severe concerns, that these fields will remain inside the structure for a long time, bring additional heating or even break up the Cooper pairs. We present results of the simulation of the transient dynamics of wake fields of very short bunches. We show how much of the energy is vanishing through the beam pipes immediately and how much energy is staying in the cavity for a long time. PB - JACoW CY - Geneva, Switzerland SP - 1049 EP - 1051 KW - cavity KW - wakefield KW - electromagnetic-fields KW - resonance KW - accelerating-gradient DA - 2015/12 PY - 2015 SN - 978-3-95450-178-6 DO - 10.18429/JACoW-SRF2015-THPB001 UR - http://srf2015.vrws.de/papers/thpb001.pdf ER -