Stochastic cooling with a double rf system

Technical Report · Tue Oct 01 04:00:00 EDT 1991

DOI:https://doi.org/10.2172/6062100· OSTI ID:6062100

Wei, J

Stochastic cooling for a bunched beam of hadrons stored in an accelerator with a double rf system of two different frequencies has been investigated. The double rf system broadens the spread in synchrotron-oscillation frequency of the particles when they mostly oscillate near the center of the rf bucket. Compared with the case of a single rf system, the cooling rate is significantly increased. When the rf voltage is raised, the reduction rate of the emittance, instead of decreasing linearly, now is independent of the ratio of the bunch area to the bucket area. With the double rf system, the spread in synchrotron-oscillation frequency is small for particles with synchrotron-oscillation amplitudes comparable to the dimension of the rf bucket. Consequently, stochastic cooling becomes less effective when the bunch area is close to the bucket area.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6062100
• Report Number(s): BNL-46792; AD/RHIC--105; ON: DE92004995
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAM BUNCHING
BEAM COOLING
BEAM DYNAMICS
BEAM EMITTANCE
BEAM TRANSPORT
BEAMS
CHARGED PARTICLES
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
GOLD IONS
HAMILTONIANS
ION BEAMS
IONS
MATHEMATICAL OPERATORS
OSCILLATIONS
PARTIAL DIFFERENTIAL EQUATIONS
QUANTUM OPERATORS
RF SYSTEMS
STOCHASTIC COOLING
SYNCHROTRON OSCILLATIONS