Title :
Overview of LEP operation in 1998
Author :
Arduini, G. ; Assmann, Ralph ; Bailey, R. ; Burkhardt, H. ; Butterworth, A. ; Collier, P. ; Cornelis, K. ; Faugier, A. ; Jonker, M. ; Lamont, M. ; Meddahi, M. ; Morpurgo, G. ; Raimondi, P. ; Roy, G. ; Uythoven, J. ; Wenninger, J.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
After the installation of 32 additional RF cavities in the 1997-1998 shutdown LEP was operated at a beam energy of 94.5 GeV. The total integrated luminosity for the year 1998 clearly surpassed its target and reached 198 pb-1. Vertical beam-beam tuneshifts of more than 0.07 were obtained. The performance did not seem to be beam-beam limited, but the total beam current was limited by power dissipation problems to around 6 mA. A high phase advance optics (102°, 90°), with a smaller natural emittance, was used for regular operation in 1998. This contributed to the excellent performance of LEP, together with the further reduction of both the horizontal and vertical beta function at the interaction points. No dynamic aperture problems were encountered
Keywords :
beam handling techniques; colliding beam accelerators; electron accelerators; particle beam stability; storage rings; LEP operation; RF cavities; dynamic aperture problems; high phase advance optics; horizontal beta function; interaction points; power dissipation problems; vertical beam-beam tuneshifts; vertical beta function; Apertures; Cables; Copper; Particle beams; Physics; Power dissipation; Radio frequency; Safety; Switches; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792124
