Title :
Effect of the beam-beam interactions on the dynamic aperture of the LHC at collision
Author :
Gelfand, N. ; Johnstone, C. ; Sen, T. ; Wan, W.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
The dynamic aperture of the LHC at collision energy is limited by the field errors in the IR quadrupoles being built at FNAL and KEK. The 300 μrad crossing angle, incorporated in the design to reduce the effect of the long-range beam beam interactions, enhances the effect of the multipoles on the dynamic aperture. We have investigated the possibility of a different crossing angle with a more accurate modelling of the long-range interactions. Tune scans have been done to determine if a better choice of the tunes exists
Keywords :
colliding beam accelerators; particle beam stability; proton accelerators; storage rings; synchrotrons; IR quadrupoles; LHC; beam-beam interactions; dynamic aperture; field errors; long-range beam beam interactions; long-range interactions; multipoles; tune scans; Apertures; Extraterrestrial measurements; Geometry; Goniometers; Large Hadron Collider; Lattices; Measurement errors; Measurement units; Resonance; Size measurement;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.794219
