ISSN - 01689002, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011, vol. 659, p. 21-29
The beam energy measurement system for the Beijing electronpositron collider
The beam energy measurement system (BEMS) for the upgraded Beijing electronpositron collider BEPC-II is described. The system is based on measuring the energies of Compton back-scattered photons. The relative systematic uncertainty of the electron and positron beam energy determination is estimated as 2×10-5. The relative uncertainty of the beams energy spread is about 6%. © 2011 Elsevier B.V. All rights reserved.