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Orbit feedback system for maintaining an optimum beam collision

Y. Funakoshi, M. Masuzawa, K. Oide, J. Flanagan, M. Tawada, T. Ieiri, M. Tejima, M. Tobiyama, K. Ohmi et al.

H. Koiso

  • High Energy Accelerator Research Organization (KEK), 1-1 Oho, Ibaraki 305-0801, Japan

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Phys. Rev. ST Accel. Beams 10, 101001 – Published 25 October, 2007

DOI: https://doi.org/10.1103/PhysRevSTAB.10.101001

Abstract

An orbit feedback system around the interaction point (IP) has been developed and successfully employed at KEKB for more than 6 years. The purpose of the system is to maintain an optimum geometrical relationship of orbits of two beams at the IP and to prevent a luminosity degradation due to orbit drifts. The feedback system is based on orbit measurements around the IP rather than a direct measurement of the luminosity. Owing to the system, the luminosity degradation due to the orbit drifts is suppressed to around or less than 1%.

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Phys. Rev. ST Accel. Beams 10, 101001– Published 25 October, 2007
  • Received 13 September 2007
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