Document Type

Conference Paper

Publication Date


Publication Title

Proceedings of the 2011 Particle Accelerator Conference



Conference Name

2011 Particle Accelerator Conference, March 28-April 1, 2011, New York, New York


The superconducting parallel-bar cavity [1] is currently being considered as a deflecting system for the Jefferson Lab 12 GeV upgrade and as a crabbing cavity for a possible LHC luminosity upgrade. Currently the designs are optimized to achieve lower surface fields within the dimensional constraints for the above applications. A detailed analysis of the fundamental input power coupler design for the parallel-bar cavity is performed considering beam loading and the effects of microphonics. For higher beam loading the damping of the HOMs is vital to reduce beam instabilities generated due to the wake fields. An analysis of threshold impedances for each application and impedances of the modes that requires damping are presented in this paper with the design of HOM couplers.


© 2011 by PAC’11 OC/IEEE

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

Original Publication Citation

De Silva, S. U., & Delayen, J. R. (2011). Fundamental and HOM Coupler design of the superconducting parallel-bar cavities [Conference Paper]. 2011 Particle Accelerator Conference, New York, New York.


0000-0002-4809-9439 (De Silva)