Title :
Measurements of the octupole-induced amplitude-dependent frequency shift in SPEAR
Author :
Tran, P. ; Pellegrini, C. ; Yang, J. ; Cornacchia, M. ; Corbett, J.
Author_Institution :
Dept. of Phys., California Univ., Los Angeles, CA, USA
Abstract :
Four octupoles are used in SPEAR to provide the frequency spread for Landau damping of coupled-bunch motions at high current. With the planned implementation of a new low-emittance lattice, the effectiveness of the octupoles needs to be quantified. The recent development of a multi-dimensional turn-by-turn phase-space monitor and the availability of an accurate frequency analysis technique have made measurement of the octupole-induced amplitude-dependent frequency shift in the new SPEAR lattice possible. This paper presents the data collection and analysis procedures, and compares experimental results to model-based simulations
Keywords :
beam handling techniques; data analysis; electron accelerators; particle beam diagnostics; particle beam dynamics; storage rings; Landau damping; SPEAR; coupled-bunch motion; data analysis; data collection; frequency analysis; octupole-induced amplitude-dependent frequency shift; turn-by-turn phase-space monitor; Clocks; Damping; Electrons; Frequency measurement; Lattices; Monitoring; Phase measurement; Physics; RF signals; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505869
