Stimulated longitudinal emittance growth in the Main Ring

Conference · Wed Mar 01 04:00:00 EST 1989

OSTI ID:5820223

Jackson, G; Ieiri, T

During fixed target operations -- beam intensity is limited by coherent instabilities in both the Main Ring and Tevatron. The growth rates for instabilities are generally inversely proportional to the proton bunch length. Since fixed target operations are insensitive to the longitudinal emittance of the beams, bunch spreaders are employed to increase the emittance, and hence the bunch length. Emittance growth is stimulated by injecting noise onto either the RF phase or amplitude control voltages. Test results of the efficiency of various stimulation schemes are reported. The design of a bunch length monitor, used to measure the effect of the bunch spreader, is also presented. 12 refs., 5 figs.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (USA)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5820223
• Report Number(s): FNAL/C-89/87; CONF-890335-234; ON: DE89015141
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BEAM BUNCHING
BEAM DYNAMICS
BEAM EMITTANCE
BEAM MONITORS
COMPUTERIZED SIMULATION
CYCLIC ACCELERATORS
DESIGN
FERMILAB TEVATRON
MEASURING INSTRUMENTS
MONITORS
PERFORMANCE
SIMULATION
SYNCHROTRONS