Impedance measurements on a test bench model of the ILC crab cavity

Author

Goudket, P. ; Beard, C. ; McIntosh, P. ; Burt, G. ; Dexter, A. ; Chanlek, N. ; Jones, R.M.

Author_Institution

ASTeC/Cockcroft Inst., Daresbury

fYear

2007

fDate

25-29 June 2007

Firstpage

2206

Lastpage

2208

Abstract

In order to verify detailed impedance simulations, the resonant modes in an aluminium model of the ILC crab cavity were investigated using a bead-pulling technique as well as a stretched-wire frequency domain measurement. The combination of these techniques allow for a comprehensive study of the modes of interest. For the wire measurement, a transverse alignment system was fabricated and RF components were carefully designed to minimize any potential impedance mismatches. The measurements are compared with direct simulations of the stretched-wire experiments using numerical electromagnetic field codes. High impedance modes of particular relevance to the ILC crab cavity are identified and characterized.

Keywords

accelerator RF systems; accelerator cavities; electric impedance measurement; frequency-domain analysis; linear colliders; ILC crab cavity; RF components; aluminium model; bead-pulling technique; impedance simulations; numerical electromagnetic field codes; potential impedance mismatches; resonant modes; stretched-wire frequency domain measurement; Aluminum; Electromagnetic fields; Electromagnetic measurements; Frequency domain analysis; Frequency measurement; Impedance measurement; Radio frequency; Resonance; Testing; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4441198

Filename

4441198