19–24 May 2024
Music City Center
US/Central timezone

Design of a two-cell C-band accelerator cavity with higher-order mode damping

TUPC02
21 May 2024, 16:00
2h
Country (MCC Exhibit Hall A)

Country

MCC Exhibit Hall A

Poster Presentation MC1.A03 Linear Lepton Colliders Tuesday Poster Session

Speaker

Haoran Xu (Los Alamos National Laboratory)

Description

Higher-order mode (HOM) damping is essential for building large-scale facility linear accelerators, such as a linear collider, because of the need to reduce the wakefield strength inside the accelerating structure. We designed a C-band accelerator cavity with distributed coupling and thin HOM-damping waveguides oriented in the radial direction. It was proposed that nickel-chrome (NiCr) coating deposited on the surface of the thin waveguides will be used to increase the surface resistivity and to damp the HOMs. Recently, we designed a two-cell cavity to conduct a concise high power test that will help us understand the fabrication challenges for the cavity with NiCr HOM absorbers, and examine the performance of the NiCr coating under high-power conditioning. This presentation will report the detailed electromagnetic and engineering design of the cavity, the theoretical prediction of the cavity high-gradient performance, the status of fabrication, and plans for high-gradient testing.

Funding Agency

This research was funded by the U.S. Department of Energy through Los Alamos National Laboratory, under Contract No. 89233218CNA000001 and DE-AC02-76SF00515.

Region represented North America

Primary author

Haoran Xu (Los Alamos National Laboratory)

Co-authors

Dongsung Kim (Los Alamos National Laboratory) Emilio Nanni (SLAC National Accelerator Laboratory) Evgenya Simakov (Los Alamos National Laboratory) Gerald Bustos (Los Alamos National Laboratory) Walter Barkley (Los Alamos National Laboratory) Zenghai Li (SLAC National Accelerator Laboratory)

Presentation materials

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