Bunch-motion feedback for B-factories

Conference · Tue Sep 01 00:00:00 EDT 1992

OSTI ID:10133459

Lambertson, G R

The colliding electron and positron beams in a B-factory must have average current of one ampere or more to produce the required luminosity. The high current interacts with structures in the beam tube to drive strong coupled-bunch (c.b.) instabilities. To suppress these instabilities requires negative feedback of the bunch motions. Beam impedances arising from strong rf cavity modes should first be reduced to make the required feedback damping rate practical and the cost economical. In what follows, control of transverse motions will be discussed first, then longitudinal. We shall use the parameters of the 3.1 GeV ring of PEP-II to illustrate the general requirements.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10133459
• Report Number(s): LBL-33359; ESG-241; CONF-9204126-19; SLAC-AP-95; ON: DE93007717; IN: AP--95; TRN: 93:006449
• Resource Relation: Conference: B factories: state of the art in accelerators, detectors, and physics,Stanford, CA (United States),6-10 Apr 1992; Other Information: PBD: Sep 1992
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
B MESONS
MESON FACTORIES
BEAM BUNCHING
FEEDBACK
MOTION
INSTABILITY
IMPEDANCE
RF SYSTEMS
PEP STORAGE RINGS
KICKER MAGNETS
430200
BEAM DYNAMICS, FIELD CALCULATIONS, AND ION OPTICS