The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Treyer, D.M. AU - Keil, B. AU - Koprek, W. AU - Lipka, D. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - Production Tests, Calibration, and Commissioning of Button BPMs for the European XFEL 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 - Commissioning of the entire European XFEL started early 2017. More than 300 button-electrode type beam position monitors (BPMs) are used in its cold Linac and warm beam transfer lines. Signal processing in the BPM RF front-end (RFFE) electronics employs signal stretching by chirp filtering, switchable gain stages, digital step attenuators, and peak detection. In this paper we present details on RF front-end production tests, calibration, and BPM beam commissioning results. Furthermore, a calibration pulser circuit that is built into each BPM electronics is presented. The setup and algorithms for production calibration of all RFFEs are described. Finally, resolution measurements obtained by correlation among all XFEL BPMs (including cavity and re-entrant types) are presented, confirming that the system can be used for orbit correction and transmission measurement down to bunch charges of a few pico-Coulombs. PB - JACoW CP - Geneva, Switzerland SP - 259 EP - 262 KW - ion KW - FEL KW - electron KW - detector KW - electronics DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-TUPCF19 UR - http://jacow.org/ibic2017/papers/tupcf19.pdf ER -