Experimental simulation of ground motion effects

Author

Syphers, M.J. ; Ball, M. ; Brabson, B. ; Bucnick, J. ; Caussyn, D.D. ; Chao, A.W. ; Collins, J. ; Derenchuk, V. ; Dutt, S. ; East, G. ; Ellison, M. ; Ellison, T. ; Friesel, D. ; Gabell, W. ; Hamilton, B. ; Huang, H. ; Jones, W.P. ; Lee, S.Y. ; Li, D. ; Mi

Author_Institution

SSC Lab., Dallas, TX, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

420

Abstract

Synchro-betatron coupling in a proton storage ring with electron cooling was studied by modulating a transverse dipole field close to the synchrotron frequency. The combination of the electron cooling and transverse field modulation on the synchrotron oscillation is equivalent to a dissipative parametric resonant system. The proton bunch was observed to split longitudinally into two pieces, or beamlets, converging toward strange attractors of the dissipative system. These phenomena might be important to understanding the effect of ground vibration on the SSC beam, where the synchrotron frequency is about 4≃7 Hz, and the effect of power supply ripple on the RHIC beam, where the synchrotron frequency ramps through 60 Hz at 17 GeV/c

Keywords

beam handling techniques; proton accelerators; storage rings; RHIC beam; SSC beam; beamlets; dissipative parametric resonant system; electron cooling; ground motion effects simulation; ground vibration; longitudinal splitting; power supply ripple; proton bunch; proton storage ring; strange attractors; synchro-betatron coupling; synchrotron frequency; synchrotron frequency ramps; synchrotron oscillation; transverse dipole field; transverse field modulation; Cooling; Electrons; Frequency; Laboratories; Power supplies; Protons; Resonance; Storage rings; Synchrotrons; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.308894

Filename

308894