Copper prototype measurements of the HOM, LOM and SOM couplers for the ILC crab cavity

Burt, G. and Ambattu, P. K. and Dexter, A. and Goudket, P. and McIntosh, P. and Bellantoni, L. and Li, Z. and Xiao, L. (2008) Copper prototype measurements of the HOM, LOM and SOM couplers for the ILC crab cavity. In: 11th European Particle Accelerator Conference, EPAC 2008, 2008-06-232008-06-27.

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Abstract

The ILC Crab Cavity is positioned close to the IP and delivered luminosity is very sensitive to the wakefields induced in it by the beam. A set of couplers were designed to couple to and damp the spurious modes of the crab cavity. As the crab cavity operates using a dipole mode, it has different damping requirements from an accelerating cavity. A separate coupler is required for the monopole modes below the operating frequency of 3.9 GHz (known as the LOMs), the opposite polarization of the operating mode (the SOM), and the modes above the operating frequency (the HOMs). Prototypes of each of these couplers have been manufactured out of copper and measured attached to an aluminum nine cell prototype of the cavity and their external Q factors were measured. The results were found to agree well with numerical simulations.

Item Type:
Contribution to Conference (Paper)
Journal or Publication Title:
11th European Particle Accelerator Conference, EPAC 2008
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
136453
Deposited By:
Deposited On:
02 Sep 2019 10:35
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:38