Title :
Simulation of longitudinal multibunch instabilities in CESR
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
A tracking simulation predicts beam current thresholds in CESR (Cornell Electron-positron Storage Ring) based on the longitudinal dynamics of multibunch beams in RF cavities. The simulated thresholds are found to have a very strong dependence on the frequencies of the HOM cavity wakefields and are consistent with CESR measurements. Fourier transforms of simulated data are also consistent with observed spectral lines in CESR. After the phase III upgrade to SRF (Superconducting RF) cavities is completed in 1999, a significant increase in the thresholds is predicted
Keywords :
colliding beam accelerators; electron accelerators; particle beam bunching; particle beam stability; storage rings; CESR; Cornell Electron-positron Storage Ring; HOM cavity wakefields; RF cavities; beam current thresholds; longitudinal dynamics; longitudinal multibunch instabilities; multibunch beams; phase III upgrade; superconducting RF cavities; tracking simulation; Chaos; Drives; Fourier transforms; Frequency measurement; Physics; Predictive models; Radio frequency; Storage rings; Synchrotron radiation; Tracking;
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.1999.794204
