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TY - CONF AU - Sun, X. AU - Lill, R.M. AU - Stillwell, B.K. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - The RF BPM Pickup Electrodes Design for the APS-MBA Upgrade 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 Advanced Photon Source (APS) is currently in the preliminary design phase for a multi-bend achromat (MBA) lattice upgrade. Beam stability is critical for the MBA and will require roughly 570 rf beam position moni-tors (BPMs) to provide the primary measurement of the electron beam trajectory through the insertion device (ID) straight sections and in the storage ring arcs. The BPM assembly features 8 mm diameter pickup electrodes that are welded to a stainless steel chamber and integrated shielded bellows both upstream and downstream of the chamber to decouple the BPM electrodes from mechani-cal motion of adjacent chambers. The design, simula-tions, and prototype test results will be presented. PB - JACoW CP - Geneva, Switzerland SP - 199 EP - 202 KW - ion KW - pick-up KW - simulation KW - storage-ring KW - vacuum DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-TUPCF03 UR - http://jacow.org/ibic2017/papers/tupcf03.pdf ER -