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

fYear

2010

fDate

8-11 May 2010

Firstpage

724

Lastpage

727

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-5705-2

Type

conf

DOI

10.1109/ICMMT.2010.5525043

Filename

5525043