Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 18th International Conference on RF Superconductivity



Conference Name

18th International Conference on RF Superconductivity, 17-21 July, 2017, Lanzhou, China


The RF-Dipole Crabbing Cavity designed for the LHC High Luminosity Upgrade includes two higher order mode (HOM) couplers. One of the HOM couplers is an rf filter, which is a high pass filter designed to couple to the horizontal dipole modes and accelerating modes up to 2 GHz, while rejecting the fundamental operating mode at 400 MHz. The coupler consists of a high pass filter circuit where the rejection of the operating mode and transmission of HOMs are sensitive to dimensional deviations. An rf test box has been designed to measure the transmission of the rf filter in order to qualify the fabricated HOM coupler and to tune the coupler. This paper presents the measurements of the HOM coupler with the rf test box.


Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.

Original Publication Citation

DeSilva, S. U., Delayen, J. R., Li, Z., & Park, H. (2018). Lessons learned from RF-dipole prototype cavities for LHC luminosity upgrade. In V.R.W. Schaa, Y. He, L. Li, & N. Zhao (Eds.), Proceedings of the 18th International Conference on RF Superconductivity (pp. 506-508). Joint Accelerator Conferences Website.


0000-0002-4809-9439 (De Silva)