Title :
Coherent mode of a high intensity beam in a synchrotron
Author :
Mechida, S. ; Uesugi, T. ; Ikegami, M.
Author_Institution :
KEK-Tanashi, Tokyo, Japan
Abstract :
As one of major sources which cause emittance growth and beam loss in high intensity hadron synchrotrons, we have investigated coherent mode oscillations in a beam. Using Sacherer´s (1968) envelope equations, mode frequencies of a bunched beam are derived. Multi-particle simulation shows that emittance growth occurs when the oscillation frequency of a coherent mode hits a resonance. The present status of a beam experiment at HIMAC is also mentioned, which is expected to show the direct observation of a resonance crossing of a coherent mode and beam loss
Keywords :
particle beam bunching; particle beam diagnostics; particle beam stability; synchrotrons; HIMAC; beam loss; coherent mode oscillations; emittance growth; envelope equations; high intensity beam; mode frequencies; oscillation frequency; resonance crossing; synchrotron; Electronic switching systems; Frequency; Integral equations; Linear accelerators; Linear particle accelerator; Particle accelerators; Particle beams; Resonance; Stability; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795625
