Title :
Variations in lengthening of bunches in bunch-train operation in CESR
Author :
Greenwald, Z. ; Rubin, D.L.
Author_Institution :
Cornell Univ., Ithaca, NY, USA
Abstract :
In the Cornell Electron Storage Ring (CESR), which is operated with nine trains of five bunches, bunch lengthening results from the interaction of the bunch with the wake voltage induced at the hundred sliding joints along the ring. The decay time for the bunch induced voltage is longer than the time between bunches. Therefore the voltage witnessed by successive bunches will depend on both the resonance frequency of the sliding joint cavity and the arrival time of the bunches. In this paper we study the differences in the equilibrium bunch lengthening within the train and between trains due to the wakes induced in the sliding joints at two different resonance frequencies. One to achieve minimum power loss and the second to achieve minimum bunch lengthening
Keywords :
accelerator RF systems; accelerator cavities; electron accelerators; electron beams; high energy physics instrumentation computing; particle beam bunching; particle beam dynamics; storage rings; CESR; Cornell Electron Storage Ring; MAFIA code; bunch arrival time; bunch induced voltage; bunch-train operation; decay time; equilibrium bunch lengthening; minimum bunch lengthening; minimum power loss; resonance frequencies; resonance frequency; sliding joint cavity; sliding joints; trapped mode resonance frequency; wake voltage-bunch interactions; Electrons; Heating; Linear particle accelerator; Resonance; Resonant frequency; Storage rings; Temperature; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987942
