Luminosity lifetime in the Tevatron
Since the inauguration of colliding proton-antiproton operations in 1987, the Tevatron has exhibited luminosity lifetimes shorter than expected. During a typical colliding beam storage period, called a store, luminosity is calculated periodically by measuring the charge and emittances of each bunch. The growth of the transverse bunch emittances is the dominant cause of luminosity deterioration. Throughout, this period, the position spectrum of the bunches exhibited betatron signals larger than expected from Schottky noise. A model assuming externally driven betatron oscillations explains both the betatron signals and the emittance growth. A program is underway to improve the Tevatron luminosity lifetime. The abort kickers have been identified as sources of emittance growth, and some quadrupole power supplies are further candidates. Because the horizontal dispersion through the RF cavities is nonzero, RF phase noise has been investigated. Noise in the main dipole regulation circuit has also been studied. 13 refs., 4 figs.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 7142456
- Report Number(s):
- FNAL/C-88/80; CONF-880695-46; ON: DE88014110; TRN: 88-028989
- Resource Relation:
- Conference: 1. European particle accelerator conference, Rome, Italy, 7 Jun 1988; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FERMILAB TEVATRON
LUMINOSITY
LIFETIME
BEAM EMITTANCE
EXPERIMENTAL DATA
NOISE
ACCELERATORS
CYCLIC ACCELERATORS
DATA
INFORMATION
NUMERICAL DATA
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SYNCHROTRONS
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics