Speaker
Description
This presentation will report on the status high gradient testing of a two-cell accelerator cavity with distributed coupling and higher-order-mode (HOM) damping slots covered with nickel-chromium (NiCr) absorbing material. The cavity is designed with a specific purpose to demonstrate applicability of NiCr material for damping HOMs in a C-band distributed-coupling accelerating structure, such as may be used in a C3 linear collider. The purpose of this experiment is to conduct a simple high-power test to understand fabrication challenges for the cavity with NiCr HOM absorbers and examine performance of the NiCr coating during high power conditioning. We will report the detailed electromagnetic and engineering design of the cavity, fabrication, cold testing, tuning, the results of high gradient testing at the CERF-NM C-band high gradient test facility at Los Alamos National Laboratory, and the results of the post-mortem inspection under a scanning electron microscope.
| Working group | WG4 |
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