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TY - CONF AU - Persichelli, S. AU - Berrig, O.E. AU - Giovannozzi, M. AU - Herbst, J. AU - Kuczerowski, J. AU - Migliorati, M. AU - Salvant, B. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Impedance Studies of the Dummy Septum for CERN PS Multi-turn Extraction J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - A protection septum has been installed in the CERN PS section 15 in order to mitigate irradiation of the magnetic septum 16 for fast extractions towards the SPS. Impedance studies have been performed, showing that beams circulating in the septum during extraction generate sharp resonances in the coupling impedance. Impedance measurements with the wire technique have been performed, showing a good agreement with simulations. Instability rise times of trapped modes have been evaluated and compared to extraction duration. Solutions for reducing the impact on the stability of the beam have been considered. PB - JACoW CP - Geneva, Switzerland SP - 1704 EP - 1707 KW - impedance KW - extraction KW - septum KW - simulation KW - synchrotron DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-TUPRI058 UR - http://jacow.org/ipac2014/papers/tupri058.pdf ER -