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TY - CONF AU - Hwang, J.G. AU - Dürr, V. AU - Ries, M. AU - Schiwietz, G. AU - Schälicke, A. AU - Wolk, D. ED - Schaa, Volker RW TI - Development of a New Button Beam-position Monitor for BESSY VSR J2 - Proc. of IBIC2018, Shanghai, China, 09-13 September 2018 CY - Shanghai, China T2 - International Beam Instrumentation Conference T3 - 7 LA - english AB - An extreme operation mode such as the BESSY-VSR conditions stimulates the development of a high accuracy bunch-by-bunch beam-position monitor (BPM) system which is compatible with the bunch-selective operation for the orbit feedback system. Such a system will also greatly benefit to accelerator R&D such as transverse resonance island buckets (TRIBs). Compensation of the long-range ringing signal produced by the combined effect of impedance mismatching inside the button and trapped TE-modes in the aluminum-oxide insulator (Al2O3) material is required essentially to improve the resolution. This is important since the ringing causes a misreading of the beam position and current of following bunches. We show the design study of a new button-type BPM to mitigate the influence of the ringing signal as well as to reduce wake losses by improving the impedance matching in the button and by replacing the insulator material. PB - JACoW Publishing CP - Geneva, Switzerland SP - 265 EP - 268 KW - impedance KW - vacuum KW - resonance KW - storage-ring KW - operation DA - 2019/01 PY - 2019 SN - 978-3-95450-201-1 DO - DOI: 10.18429/JACoW-IBIC2018-TUPB04 UR - http://jacow.org/ibic2018/papers/tupb04.pdf ER -