The beam energy measurement system for the Beijing electron-positron collider

Details The beam energy measurement system for the Beijing electron-positron collider The beam energy measurement system for the Beijing electron-positron collider

2011-09-27

arxiv.org/abs/1109.5771v1

Nuclear Inst. and Methods in Physics Research, A 659 (2011) pp. 21-29

Physics

Accelerator Physics

Scientific paper

10.1016/j.nima.2011.08.050

The beam energy measurement system (BEMS) for the upgraded Beijing electron-positron 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 \cdot 10^{-5}. The relative uncertainty of the beam's energy spread is about 6 %.

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