Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73471
