Title :
Calculations and design of a third harmonic cavity for increasing the beam lifetime
Author :
Liu, Guangchao ; Wu, Cong-Feng ; Lin, Wang ; Hao, Fan ; Feng, Guangyao ; Zhang, Shancai ; Li, Weimin
Author_Institution :
Nat. Synchrotron Radiat. Lab., Univ. of Sci. & Tech. of China, Hefei, China
Abstract :
Higher harmonic cavities are used widely in light sources to increase the bunch length and decrease the charge density. This approach may be adopted to increase the beam lifetime in HLS-II. The beam dynamics and bunch lengthening with a passive harmonic cavity are presented in this paper. The result shows the charge density is decreased greatly. A third harmonic cavity similar to the KEK-PF RF cavity for HLS-II is designed, in which the higher order modes are absorbed by SiC ducts and three couplers with rodshaped antenna.
Keywords :
accelerator RF systems; accelerator cavities; particle beam bunching; particle beam dynamics; particle beam stability; synchrotrons; HLS-II; KEK-PF RF cavity; beam dynamics; beam lifetime; bunch length; charge density; light sources; rodshaped antenna; third harmonic cavity; Acceleration; Ducts; Electrons; Impedance; Light sources; Particle beams; Radio frequency; Silicon carbide; Synchrotron radiation; Voltage;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5705-2
DOI :
10.1109/ICMMT.2010.5525043
