SPEAR Nonlinear Studies

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.

Selection of Experimental Shift Summaries Relevant the Subject

Shift Summary: "Phase-Space Dynamics Studies" on January 22-23, 1996

List Publications

Publication about octupole induced frequency shift (About 1.78 MBytes !!!)

Phuong Tran, SSRL 15 February 1996