Nonlinear dynamics experiment in the Tevatron

Author

Merminga, N. ; Edwards, D. ; Finley, D. ; Gerig, R. ; Gelfand, N. ; Harrison, M. ; Johnson, R. ; Syphers, M. ; Meller, R. ; Siemann, R. ; Talman, R. ; Morton, P. ; Chao, A. ; Chen, T. ; Johnson, D. ; Peggs, S. ; Peterson, J. ; Saltmarsh, C. ; Schachinger,

Author_Institution

Fermi Nat. Accel. Lab., Batavia, IL, USA

fYear

1989

fDate

20-23 Mar 1989

Firstpage

1429

Abstract

Results of the continuing analysis of the nonlinear dynamics experiment, E778, are presented. Sixteen special sextupoles introduced nonlinearities in the Tevatron. Smear, which is one of the parameters used to quantify the degree of nonlinearity, was extracted from the data and compared with calculation. Injection efficiency in the presence of nonlinearities was studied. Measurements of the dynamic aperture were performed. The final results in one degree of freedom of the smear, the injection efficiency, and the dynamic aperture are presented. Particles captured on nonlinear resonance islands were directly observed and measurements were taken. The capture efficiency was extracted from the data and compared with prediction. The influence of tune modulation on the stability of these islands was investigated. Plans for future measurements are discussed

Keywords

synchrotrons; E778; Tevatron; capture efficiency; dynamic aperture; injection efficiency; nonlinear dynamics experiment; nonlinear resonance islands; sextupoles; smear; tune modulation; Apertures; Chaos; Data mining; Linear accelerators; Nonlinear distortion; Particle measurements; Particle tracking; Performance evaluation; Resonance; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/PAC.1989.73471

Filename

73471