The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Koprek, W. AU - Gloor, M. AU - Keil, B. AU - Malatesta, A. AU - Marcellini, F. AU - Marinkovic, G. AU - Roggli, M. AU - Stadler, M. AU - Treyer, D.M. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - Status of the Transverse Intra Bunch Train Feedback of 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 - The European XFEL has a transverse Intra Bunch Train Feedback (IBFB) that is able to measure and correct the beam position of each bunch individually by means of cavity beam position monitors (CBPMs) and stripline kicker magnets. The IBFB core system is located between the collimator and the beam distribution kicker system, using two vertical and two horizontal kickers as well as eight nearby CBPMs for an ultra-fast feedback loop. Moreover, it receives data from all undulator BPMs via longer fiber optic cables, thus allowing to correct small beam trajectory perturbations that may occur between the IBFB core systems and the undulators located some 100m downstream. After first lasing has been observed in 5/2017, the IBFB is presently being commissioned with beam. This paper will report on the final design of the IBFB system, FPGA-based data transfer and signal processing concept, as well as on the achieved performance and latest results of the different IBFB subsystems (including CBPMs) and overall system. PB - JACoW CP - Geneva, Switzerland ER -