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

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

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...

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Veröffentlicht in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2011-12, Vol.659 (1), p.21-29
Hauptverfasser: Abakumova, E.V., Achasov, M.N., Blinov, V.E., Cai, X., Dong, H.Y., Fu, C.D., Harris, F.A., Kaminsky, V.V., Krasnov, A.A., Liu, Q., Mo, X.H., Muchnoi, N.Yu, Nikolaev, I.B., Qin, Q., Qu, H.M., Olsen, S.L., Pyata, E.E., Shamov, A.G., Shen, C.P., Todyshev, K.Yu, Varner, G.S., Wang, Y.F., Xiao, Q., Xu, J.Q., Zhang, J.Y., Zhang, T.B., Zhang, Y.H., Zhukov, A.A.
Format: Artikel
Sprache:eng
Schlagworte:
[formula omitted] factory
Accelerators
Beam energy calibration
Beams (radiation)
Boundary element method
Collider BEPC-II
Compton backscattering
Energy (nuclear)
Mathematical analysis
Measuring instruments
Photons
Uncertainty
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Beschreibung
Zusammenfassung: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 2×10−5. The relative uncertainty of the beam's energy spread is about 6%.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2011.08.050