25–30 Aug 2024
Hilton Chicago
America/Chicago timezone

An overview of microphonics in CEBAF and current moderation techniques

MOPB007
26 Aug 2024, 16:00
2h
Boulevard (Hilton Chicago)

Boulevard

Hilton Chicago

720 South Michigan Ave Chicago, IL 60605 USA
Poster Presentation MC4.2 Cryomodules and cryogenics Monday Poster Session

Speaker

Tom Powers (Thomas Jefferson National Accelerator Facility)

Description

Superconducting RF (SRF) structures are susceptible to frequency detuning from external vibrations and modal mechanical resonances in the structure. These small disturbances, known as microphonics, require additional RF power in CW accelerating structures since the frequency is constantly shifting. In the Jefferson Lab CEBAF accelerator, time and frequency data of this frequency shift have been recorded for many years, allowing a retrospective analysis of different microphonics-mitigation techniques. Some of these techniques are specific to the design of each CEBAF cryomodule, for example implementing BNNT damping material on the cavity string. Other techniques are universal such as affixing vacuum lines and reinforcing waveguide structures.

Funding Agency

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.

Author

Peter Owen (Thomas Jefferson National Accelerator Facility)

Co-author

Tom Powers (Thomas Jefferson National Accelerator Facility)

Presentation materials

There are no materials yet.