Fast global orbit feedback system in PLS-II

Abstract

The transverse position of the electron beam in the Pohang Light Source-II is stabilized by the global orbit feedback system. A slow orbit feedback system has been operating at 2 Hz, and a fast orbit feedback (FOFB) system at 813 Hz was installed recently. This FOFB system consists of 96 electron-beam-position monitors, 48 horizontal fast correctors, 48 vertical fast correctors and Versa Module Europa bus control system. We present the design and implementation of the FOFB system and its test result. Simulation analysis is presented and future improvements are suggested. K: Instrumentation for particle accelerators and storage rings -high energy (linear accelerators, synchrotrons); Instrumentation for synchrotron radiation accelerators; Accelerator Subsystems and Technologies 1Corresponding author.

A method to detect multiple error sources and suppression of periodic beam motion with feedforward correction

“…The first one is to detect possible error sources and to eliminate or remove these sources [4,5]. The second one is to use a feedback [6]- [9] or feedforward correction [10,11] to suppress beam motion caused by such error sources.…”