The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Toyama, T. AU - Ichikawa, A. AU - Koseki, T. AU - Kuboki, H. AU - Nakamura, K.G. AU - Nakaya, T. AU - Okada, M. AU - Uno, W. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - New Design of a Tapered-Coupler BPM Toward Simpler Geometry and Flatter Frequency Response J2 - Proc. of IBIC2017, Grand Rapids, MI, USA, 20-24 August 2017 C1 - Grand Rapids, MI, USA T2 - International Beam Instrumentation Conference T3 - 6 LA - english AB - The tapered-coupler stripline beam position monitor has been used for the intra-bunch feedback system in the J-PARC MR. It should be realized with a special shaped striplines, for example, whose width is tailored exponentially and whose gap distances between the inner surface of the beam pipe should be also decreasing as a exponential function in order to keep the characteristic impedance 50 ohm. This 3D varying geometry makes it difficult to achieve the good balance between the electrode responses to the beam. We present a new design method with a groove, which may give simpler geometry and flatter frequency response. PB - JACoW CP - Geneva, Switzerland SP - 237 EP - 239 KW - ion KW - coupling KW - pick-up KW - feedback KW - proton DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-TUPCF13 UR - http://jacow.org/ibic2017/papers/tupcf13.pdf ER -