DocumentCode
3145643
Title
IS LEP beam-beam limited at its highest energy?
Author
Brandt, D. ; Herr, W. ; Meddahi, M. ; Verdier, A.
Author_Institution
CERN, Geneva, Switzerland
Volume
5
fYear
1999
fDate
1999
Firstpage
3005
Abstract
The operation of LEP at 45.6 GeV was limited by beam-beam effects and the vertical beam-beam parameter ξy never exceeded 0.045. At the highest energy of 94.5 GeV, the increased damping allows higher beam-beam parameters ξy. Values above 0.07 in the vertical plane averaged over four experiments have been obtained frequently with peak values up to 0.075 in a single experiment. Although the maximum intensity in LEP is presently limited by technical considerations, some observations indicate that the beam-beam limit is close and the question of the maximum possible values can be raised. These observations are shown in this paper and possible consequences are presented. The optimum operation of LEP in the neighbourhood of the beam-beam limit is discussed
Keywords
colliding beam accelerators; electron accelerators; particle beam dynamics; particle beam stability; storage rings; 45.6 GeV; 94.5 GeV; LEP; beam-beam effects; damping; vertical beam-beam parameter; Linear particle accelerator; Optical beams; Optical control; Optical coupling; Particle beams; Resonance; Stimulated emission; Tail; Undulators;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location
New York, NY
Print_ISBN
0-7803-5573-3
Type
conf
DOI
10.1109/PAC.1999.792127
Filename
792127
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