Effects of RF noise on longitudinal emittance growth in the Tevatron

Author

Steimel, J. ; Lebedev, V. ; Gonin, I. ; Khabibouline, T. ; Reid, J. ; Romanov, G. ; Shiltsev, V. ; Tollestrup, A.

Author_Institution

Fermi Nat. Accel. Lab., USA

Volume

1

fYear

2003

fDate

12-16 May 2003

Firstpage

48

Abstract

Phase and amplitude noises in the Tevatron RF system and the intrabeam scattering (IBS) produce longitudinal emittance growth with consecutive particle loss from the RF buckets. That causes a decrease of the luminosity and an increase of the background in particle detectors during the store. The report presents experimental measurements of RF system noise and the effect on the longitudinal emittance growth. There is a satisfactory agreement between measured noise spectral densities and observed emittance growth. For high bunch intensities, IBS plays an important role and has been taken into account. The sources of noises and plans for further system improvements are discussed.

Keywords

accelerator RF systems; accelerator cavities; colliding beam accelerators; particle beam bunching; phase noise; proton accelerators; storage rings; synchrotrons; RF buckets; RF noise; Tevatron; amplitude noise; background increase; consecutive particle loss; high bunch intensities; individual cavities; intrabeam scattering; longitudinal emittance growth; number of colliding bunches; phase noise; DC generators; Density measurement; Lenses; Noise level; Noise measurement; Phase noise; Pollution measurement; Radio frequency; Superconducting device noise; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288837

Filename

1288837