Control of coupled-bunch instabilities in high current storage rings

Conference · Mon Apr 01 04:00:00 EST 1991

OSTI ID:5660533

Lambertson, G

Intense particle beams may be subject to coupled-bunch instabilities that would grow at rates greater than the bunch oscillation frequencies. The suppression of the growth requires both reduction of the driving impedances and active feedback of bunch motions. The shunt impedances of higher-order cavity resonances can be reduced by passive dampers and the beam impedance within the band of the fundamental resonance can be reduced by rf feedback around the cavity and power amplifier. The feedback of bunch motions composed of numerous coupled-bunch modes requires broad-band systems for which the amplifiers are costly. Examples proposed for electron storage rings are presented. 10 refs, 5 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5660533
• Report Number(s): LBL-30225; CONF-910505--324; ON: DE91014713
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAM BUNCHING
BEAM DYNAMICS
CAVITY RESONATORS
ELECTRONIC EQUIPMENT
EQUIPMENT
FEEDBACK
IMPEDANCE
INSTABILITY
RESONATORS
STORAGE RINGS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
WAVEGUIDES