Tune modulated beam-beam resonances in the Tevatron

Conference · Wed May 01 00:00:00 EDT 1991

OSTI ID:5617468

Saritepe, S; Peggs, S

During the 88--89 Tevatron collider run, 6 antiproton bunches were colliding head-on with 6 proton bunches at 12 crossing points symetrically distributed around the ring. Typical intensities were 7 {times} 10{sup 10} and 2.5 {times} 10{sup 10} particles per bunch for protons and antiprotons respectively. The normalized transverse proton emittance (95% definition) was typically 25 {pi} mm-mr on both planes and the antiproton transverse emittance was typically 18 {pi} mm-mr. The working point (unshifted horizontal and vertical tunes) was near 19.41. Given the working point and typical tune spreads of about 0.024, it is unavoidable that the 12th order resonance will affect some of the antiprotons. This resonance was certainly felt by the {alpha} > 2{sigma} particles in the 88--89 run when proton and antiproton emittances were equal. The situation improved when the proton emittance was increased. In this paper, we determine the range of critical resonances by applying the analytic theory of tune-modulated beam-beam resonances to the 88--89 run and to the main injector upgrade scenario. The analytic theory neglects long-range tune shifts and resonances. 3 refs., 4 figs.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 5617468
• Report Number(s): FNAL/C-91/110; CONF-910505-326; ON: DE91014841
• Resource Relation: Conference: 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM-BEAM INTERACTIONS
RESONANCE
TUNING
BEAM EMITTANCE
FERMILAB TEVATRON
MODULATION
PROTON-ANTIPROTON INTERACTIONS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BEAM DYNAMICS
CYCLIC ACCELERATORS
HADRON-HADRON INTERACTIONS
INTERACTIONS
NUCLEON-ANTINUCLEON INTERACTIONS
PARTICLE INTERACTIONS
SYNCHROTRONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics