Triggering at high luminosity colliders

Triggering at High Luminosity Colliders

This article discusses the techniques used to select online promising events at high energy and high luminosity colliders. After a brief introduction, explaining some general aspects of triggering, the more specific implementation options for well established machines like the Tevatron and Large Hadron Collider are presented. An outlook on what difficulties need to be met is given when designin...

Preserving high multibunch luminosity in linear colliders

An analytic theory of cumulative multibunch beam breakup in linear colliders is developed. Included is a linear variation of transverse focusing across the bunch train as might be applied, e.g., by chirping the radio frequency power sources or by using radio frequency quadrupole magnets. The focusing variation saturates the exponential growth of the beam breakup and establishes an algebraic dec...

Electron-cloud Effects in High-luminosity Colliders

Electron-cloud instabilities are expected to be important in most high-luminosity double-ring colliders. In this report, I describe a few parameter regimes and some critical parameter dependences of this type of instability, and illustrate these with simulation results for the PEP-II and KEK B factories, the LHC, the VLHC, and DAPHNE. In addition, I study the possibility and the potential impac...

ATTAINING HIGH LUMINOSITY IN LINEAR efe- COLLIDERS*

Electron - Cloud E ects in High - Luminosity Colliders

Electron-cloud instabilities are expected to be important in most high-lu-minosity double-ring colliders. In this report, I describe a few parameter regimes and some critical parameter dependences of this type of instability, and illustrate these with simulation results for the PEP-II and KEK B factories , the LHC, the VLHC, and DAPHNE. In addition, I study the possibility and the potential imp...