JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Huang, J.Y. AU - Kim, J.-H. AU - Lee, J.-W. AU - Park, M.K. AU - Won, S.C. ED - Pak, Cheol-on ED - Kurokawa, Shin-ichi ED - Katoh, Tadahiko ED - Furukawa, Kazuro ED - Schaa, Volker RW TI - PLS Beam Position Measurement and Feedback System J2 - Proc. of ICALEPCS1991, Tsukuba, Japan, 11-15 November 1991 CY - Tsukuba, Japan T2 - International Conference on Accelerator and Large Experimental Physics Control Systems T3 - 3 LA - english AB - A real-time orbit correction system is proposed for the stabilization of beam orbit and photon beam positions in Pohang Light Source. PLS beam position monitor system is designed to be VMEbus compatible to fit the real-time digital orbit feedback system. A VMEbus based subsystem control computer, Mil-1553B communication network and 12 BPM/PS machine interface units constitute digital part of the feedback system. With the super-stable PLS correction power supply, power line frequency noise is almost filtered out and the dominant of beam orbit fluctuations are expected to appear below 15 Hz. DSP board in SCC for the computation and using an appropriate compensation circuit for the phase delay by the vacuum chamber, PLS real-time orbit correction system is realizable without changing the basic structure of PLS computer control system. PB - JACoW Publishing CP - Geneva, Switzerland SP - 427 EP - 430 KW - real-time KW - feedback KW - closed-orbit KW - detector KW - controls DA - 1992/12 PY - 1992 SN - 2226-0358 SN - 978-3-95450-254-7 DO - doi:10.18429/JACoW-ICALEPCS1991-S12FC05 UR - https://jacow.org/icalepcs1991/papers/s12fc05.pdf ER -