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TY - CONF AU - Shobuda, Y. AU - Harada, H. AU - Hotchi, H. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Measurement Results of the Impedance of the RF-cavity at the RCS in J-PARC J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - The kicker impedance dominates at the RCS in J-PARC. Recently, we observe beam instabilities, which are not explained by the kicker. As a candidate causing the beam instability, the impedance of the RF-cavity is measured. The longitudinal impedance is measured by stretching a single-wire inside the cavity. On the other hand, the measurement of the transverse impedance is done by horizontally shifting the single-wire, due to the accuracy problem. The measured impedance is too low to explain the beam instability. PB - JACoW CP - Geneva, Switzerland SP - 255 EP - 257 KW - impedance KW - cavity KW - injection KW - kicker KW - proton DA - 2015/06 PY - 2015 SN - 978-3-95450-168-7 DO - 10.18429/JACoW-IPAC2015-MOPWA058 UR - http://jacow.org/ipac2015/papers/mopwa058.pdf ER -