Title :
Low emittance lattice for LEP
Author :
Alexahia, Y. ; Brandt, D. ; Cornelis, K. ; Hofmann, A. ; Koutchouk, J-P. ; Meddahi, M. ; Roy, G. ; Verdier, A.
Author_Institution :
JINR, Dubna, Russia
Abstract :
In order to obtain the largest luminosity with LEP2, it is attractive to make the beam emittance as small as possible because the beam-beam effect is not a limitation at the energy of E≈90 GeV for the obtained bunch currents. This can be achieved with a high tune lattice. Two possible candidates are lattices with a horizontal phase advance of 108° or 135° per cell. Both have a vertical phase advance of 60°. These lattices were developed during 1994 and the results are presented. Tests to reach high intensity for the 108° lattice were performed and the bunch current achieved is compared with expectations. For this lattice the detuning vs. intensity and several optics parameters were measured as well
Keywords :
beam handling equipment; beam handling techniques; colliding beam accelerators; electron accelerators; electron optics; storage rings; synchrotrons; 90 GeV; LEP; LEP2; beam emittance; beam-beam effect; bunch currents; detuning; high tune lattice; horizontal phase advance; low emittance lattice; optics parameters; vertical phase advance; Collimators; Lattices; Light sources; Nonlinear optics; Optical tuning; Performance evaluation; Resonance; Stimulated emission; Synchrotrons; Testing;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.504719
