Title :
Suppression of longitudinal coupled-bunch instabilities by a passive higher harmonic cavity
Author :
Bosch, R.A. ; Hsue, C.S.
Author_Institution :
Synchrotron Radiat. Res. Center, Hsinchu, Taiwan
Abstract :
A double RF-cavity system with a passive higher-harmonic cavity is considered for the purpose of preventing coupled-bunch instabilities and/or increasing the bunch lifetime. Expressions are presented for the onset of the equilibrium phase instability, the frequency and damping rate of the Robinson instability, the synchrotron frequency, synchrotron frequency spread, and bunch length. An algorithm is presented for evaluating the performance of a passive higher-harmonic cavity, and applied to the SRRC electron storage ring, which is being installed
Keywords :
beam handling equipment; beam handling techniques; cavity resonators; electron accelerators; particle beam diagnostics; storage rings; tuning; Robinson instability; SRRC electron storage ring; bunch lifetime; damping rate; double RF-cavity system; equilibrium phase instability; longitudinal coupled-bunch instability suppression; passive higher harmonic cavity; synchrotron frequency; synchrotron frequency spread; Damping; Impedance; Q factor; Radio frequency; Resonance; Resonant frequency; Storage rings; Synchrotron radiation; Tuning; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309653
