Influence of collective effects on the performance of high-luminosity colliders

Conference · Sun Apr 01 00:00:00 EST 1990

OSTI ID:6515698

Zisman, M S

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

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6515698
• Report Number(s): LBL-28820; CONF-9002128-3; ON: DE91001797; TRN: 91-000729
• Resource Relation: Conference: Workshop on beam dynamics issues of high luminosity asymmetric collider rings, Berkeley, CA (USA), 12-16 Feb 1990
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
COLLIDING BEAMS
BEAM DYNAMICS
ACCELERATORS
B MESONS
BEAM BUNCHING
BEAM EMITTANCE
DESIGN
ELECTRIC IMPEDANCE
ELECTRON-POSITRON INTERACTIONS
INSTABILITY
PERFORMANCE
SCATTERING
BEAMS
BOSONS
ELEMENTARY PARTICLES
HADRONS
IMPEDANCE
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MESONS
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics