Title :
Effect on luminosity from bunch-to-bunch orbit displacements at CESR
Author :
Sagan, D. ; Billing, M. ; Palmer, M.
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
In routine operation the Cornell electron/positron storage ring, CESR, collides 9 trains of 4 or 5 bunches of electrons and positrons. The luminosity of individual bunch pairs can suffer if the transverse positions of those bunches are displaced differentially. This paper will present the results of studies of the effect of bunch-by-bunch or train-by-train variations in the luminosity by measuring (1) the deflection from the beam-beam interaction, (2) the relative positions of the bunches, and (3) the bunch dependent luminosity from the CLEO detector. Comparisons between these three methods are discussed
Keywords :
colliding beam accelerators; electron accelerators; particle beam bunching; particle beam diagnostics; storage rings; CESR; Cornell electron/positron storage ring; beam-beam interaction; bunch-bunch orbit displacements; collider; individual bunch pairs; luminosity effect; train-by-train variations; Condition monitoring; Electron beams; Electrostatics; Extraterrestrial measurements; Particle separators; Position measurement; Positrons; Radio frequency; Storage rings; Voltage fluctuations;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987511
