Title :
Effect of tune modulation on the dynamic aperture of the SSC lattice
Author :
Sen, Tanaji ; Chao, A.W. ; Yan, Y.T.
Author_Institution :
Superconducting Super Collider Lab., Dallas, TX, USA
Abstract :
The effects of magnet power supply ripple on the long-term dynamic aperture of the SSC lattice by modulating the tunes is modeled. The lattice is represented by a Taylor map of twelfth order in the phase-space coordinates. The transverse tunes parameterizing the rotation matrix (obtained from the linear terms of the map) are sinusoidally modulated at different choices of amplitude and frequency. Particles are tracked through this modulated map for a million turns. The tune modulation results in a decrease of the dynamic aperture. The extent of this decrease depends largely on the tune of the lattice, and to a secondary extent on the amplitude and frequency of the ripple.<>
Keywords :
particle beam diagnostics; proton accelerators; storage rings; synchrotrons; SSC lattice; Superconducting Super Collider; Taylor map; long-term dynamic aperture; magnet power supply ripple; phase-space coordinates; transverse tunes; tune modulation; Amplitude modulation; Apertures; Chaos; Chirp modulation; Frequency; Lattices; Particle tracking; Phase modulation; Power supplies; Superconducting magnets;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164296
