Title :
Longitudinal broadband impedance measurement system by coaxial line methods
Author :
Gang, Huang ; Wenhui, Huang ; Dechun, Tong ; Zhentang, Zhao
Author_Institution :
Tsinghua Univ., Beijing, China
Abstract :
Impedance of vacuum components in the ring is very important in the analysis of beam instability. This paper describes the construction of a broadband impedance measurement system. This system applies the coaxial line methods of M. Sands and J. Rees. The system is made up of HP8720B vector network analyser and a PC computer. A new RF connector is designed to get the inner conductor straining and RF impedance matching. A pillbox cavity is measured by this system. The result agreed well with the MAFIA calculation
Keywords :
accelerator RF systems; accelerator cavities; coaxial cables; electron accelerators; high energy physics instrumentation computing; microcomputer applications; network analysers; particle beam diagnostics; particle beam stability; storage rings; vacuum apparatus; HP8720B vector network analyser; MAFIA calculation; PC computer; RF connector; RF impedance matching; beam instability; coaxial line methods; electron storage ring; inner conductor; longitudinal broadband impedance measurement system; pillbox cavity; vacuum components; Coaxial components; Conductors; Connectors; Couplings; Frequency measurement; Impedance measurement; Radio frequency; Scattering parameters; Transmission line measurements; Yarn;
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.2001.987276
