Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 7th International Particle Accelerator Conference



Conference Name

7th International Particle Accelerator Conference, May 8-13, 2016, Busan, Korea


The LHC double quarter wave (DQW) crab cavities have two different types of Higher Order Mode (HOM) couplers in addition to a fundamental power coupler (FPC). The FPC requires conditioning, so to achieve this we have designed a radio-frequency (RF) quarter wave resonator to provide high transmission between two opposing FPCs. For the HOM couplers we must ensure that the stop-band filter is positioned at the cavity frequency and that peak transmission occurs at the same frequencies as the strongest HOMs. We have designed two test boxes which preserve the cavity spectral response in order to test the couplers.


© 2016 JACoW, Geneva, Switzerland.

Published under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) License.

Original Publication Citation

Mitchell, J. A., Apsimon, R., Burt, G., Calaga, R., Macpherson, A., Montesinos, E., Silva, S. D., Tutte, A. R. J., & Xiao, B. P. (2016). LHC crab cavity coupler test boxes. In Christine Petit-Jean-Genaz, Dong Eon Kim, Kyung Sook Kim, In Soo Ko, & Volker RW Schaa (Eds.), Proceedings of the 7th International Particle Accelerator Conference (pp. 2248-2250). Joint Accelerator Conferences Website.


0000-0002-4809-9439 (De Silva)