Influence of collective effects on the performance of high-luminosity colliders
- Lawrence Berkeley Lab., CA (USA)
The design of a high-luminosity electron-positron collider to study B physics is a challenging task from many points of view. In this paper we consider the influence of collective effects on the machine performance; most of our findings are generic,'' in the sense that they depend rather weakly on the details of the machine design. Both single-bunch and coupled-bunch instabilities are described and their effects are estimated based upon an example machine design (APIARY-IV). In addition, we examine the possibility of emittance growth from intrabeam scattering and calculate the beam lifetime from both Touschek and gas scattering. We find that the single-bunch instabilities should not lead to difficulty, and that the emittance growth is essentially negligible. At a background gas pressure of 10 nTorr, beam lifetimes of only a few hours are expected. Multibunch growth rates are very severe, even when using an optimized RF system consisting of single-cell, room-temperature RF cavities with geometrical shapes typical of superconducting cavities. Thus, a powerful feedback system will be required. In terms of collective effects, it does not appear that there are any fundamental problems standing in the way of successfully designing and building a high-luminosity B factory. 15 refs., 21 figs., 5 tabs.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC03-76SF00098; AC03-76SF00515
- OSTI ID:
- 6874765
- Report Number(s):
- SLAC-ABC-8; ON: DE90012654; TRN: 90-019804
- Country of Publication:
- United States
- Language:
- English
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Influence of collective effects on the performance of high-luminosity colliders
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Related Subjects
COLLIDING BEAMS
BEAM DYNAMICS
BEAM BUNCHING
BEAM EMITTANCE
BEAM-BEAM INTERACTIONS
ELECTRIC IMPEDANCE
ELECTRON-POSITRON INTERACTIONS
INSTABILITY
PERFORMANCE
SCATTERING
SUPERCONDUCTING CAVITY RESONATORS
BEAMS
CAVITY RESONATORS
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
PARTICLE INTERACTIONS
RESONATORS
SUPERCONDUCTING DEVICES
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics
430100 - Particle Accelerators- Design
Development
& Operation